Entries |
Document | Title | Date |
20080198202 | Microfluidic Architecture - A microfluidic architecture is disclosed. The microfluidic architecture includes a substrate having an edge and a thin film stack established on at least a portion of the substrate adjacent the edge. The thin film stack includes a non-conducting layer and a seed layer, where the seed layer is positioned such that a portion of the non-conducting layer is exposed. A chamber layer is established on at least a portion of the seed layer. The non-conducting layer, the seed layer, and the chamber layer define a microfluidic chamber. A layer having a predetermined surface property is electroplated on the chamber layer and on at least one of another portion of the seed layer and the exposed portion of the non-conducting layer. | 08-21-2008 |
20080231665 | INKJET PRINTHEAD, PRINTING METHOD USING THE SAME, AND METHOD OF MANUFACTURING THE INKJET PRINTHEAD - The inkjet printhead includes substrate having an ink feed hole formed to supply ink, a chamber layer stacked on the substrate, and including a plurality of main ink chambers formed therein with the ink feed hole therebetween and a plurality of compensation ink chambers formed therein between the main ink chambers that face each other; and a nozzle layer stacked on the chamber layer, and including a plurality of main nozzles corresponding to the main ink chambers and a plurality of compensation nozzles corresponding to the compensation ink chambers. | 09-25-2008 |
20080239012 | Inkjet Printer With A Pagewidth Printhead Having Nozzle Arrangements With An Actuating Arm Having Particular Dimension Proportions - An inkjet printer has a pagewidth printhead with a plurality of nozzle arrangements. Each nozzle arrangement includes a substrate with an inlet channel etched therethrough, and nozzle chamber walls and a roof to define an ink chamber, with an ink ejection port defined in the roof inline with the inlet channel. The nozzle arrangement includes a thermal actuating arm inside the chamber, an upper side of the arm defining a displacement area that acts on ink in the chamber to eject ink via the ejection port. The displacement area is greater than half an area of the ink ejection port but less than twice the area of the ink ejection port. | 10-02-2008 |
20080246819 | Inkjet Printhead Nozzle Incorporating Movable Roof Structures - A printhead is provided for an inkjet printer. The printhead includes a plurality of nozzle arrangements arranged in staggered rows. Each nozzle arrangement includes a substrate assembly defining an ink inlet channel. A static nozzle chamber wall extends from the substrate assembly and surrounds the ink inlet channel. A movable roof structure defines a movable nozzle chamber wall surrounding the static nozzle chamber wall. The movable nozzle chamber wall, together with the static nozzle chamber wall, defines a nozzle chamber in fluid communication with the ink inlet channel. The roof structure further defines an ink ejection port in fluid communication with the nozzle chamber. A thermal actuator includes an anchor located outside the static nozzle chamber wall and a plurality of actuator arms extending from the anchor to the roof structure. The thermal actuator is configured so that, upon actuation, the roof structure moves responsive to differential expansion of the arms and ink within the nozzle chamber is thereby ejected from the ink ejection port. | 10-09-2008 |
20080246820 | INKJET PRINTHEAD NOZZLE WITH A PATTERNED SURFACE - A nozzle is provided for an inkjet printhead. The nozzle includes a wafer assembly defining an ink supply channel. A chamber roof layer is supported by the wafer assembly. The chamber roof layer defines a nozzle chamber in fluid communication with the ink supply channel and a nozzle aperture through which ink in the nozzle chamber can be ejected. A thermal actuator is sandwiched between the wafer assembly and the chamber roof layer. The thermal actuator includes a heater element which, upon actuation, ejects ink from the nozzle chamber out through the nozzle aperture. The chamber roof layer defines an external patterned surface surrounding the nozzle aperture, the patterned surface being configured to inhibit dust particles from sticking to the chamber roof layer. | 10-09-2008 |
20080252696 | Inkjet Printer Having A Printhead With A Bi-Layer Thermal Actuator Coil - Provided is a printhead for an inkjet printer. The printhead has a plurality of micro-electromechanical ejection mechanisms arranged in a wafer substrate, with each mechanism having chamber walls and a roof formed on top of said substrate to define an ink chamber. One wall of the chamber defines a slot therein. The mechanism also includes an ink supply channel defined through the substrate to said chamber. The mechanism includes a bi-layer thermal actuator coil fast with the substrate and ending in a strut extending through the slot, said strut fast with a paddle device within the chamber. | 10-16-2008 |
20080259130 | SUBSTRATE FOR INKJET PRINTING HEAD AND METHOD FOR MANUFACTURING THE SUBSTRATE - There is provided a substrate for an inkjet printing head and a method for manufacturing the same, in which the substrate has a structure that different kinds of metals do not come into contact with ink or moisture. For this purpose, the structure is constituted such that a diffusion preventing layer for mainly protecting a lower layer among power wiring metals is covered by a metal layer for mainly supplying power, in connection with its upper surface and at least part of a side surface. Herewith, since a single metal appears on a surface of the power wiring including up to its side surface, even circumstance occurs of coming into contact with the ink or the moisture, a battery reaction accompanied by difference of ionization tendency is not generated, and thus corrosion or short-circuit of the power wiring is suppressed. | 10-23-2008 |
20080259131 | LOW ENERGY, LONG LIFE MICRO-FLUID EJECTION DEVICE - Micro-fluid ejection heads and methods for extending the life of micro-fluid ejection heads. One such micro-fluid ejection head includes a substrate having a plurality of thermal ejection actuators. Each of the thermal ejection actuators has a resistive layer and a protective layer thereon. A flow feature member is adjacent the substrate and defines a fluid feed channel, a fluid chamber associated with at least one of the actuators and in flow communication with the fluid feed channel, and a nozzle. The nozzle is offset to a side of the chamber opposite the feed channel. A polymeric layer having a degradation temperature of less than about 400° C. overlaps a portion of the at least one actuator associated with the fluid chamber and positioned less than about five microns from at least an edge of the at least one actuator opposite the fluid feed channel. | 10-23-2008 |
20080259132 | INKJET PRINTHEAD WITH NOZZLE ASSEMBLIES HAVING FLUIDIC SEALS - Provided is an inkjet printhead for a printer, the printhead having a plurality of micro-electromechanical nozzle assemblies. Each nozzle assembly includes a substrate defining an ink inlet channel and an arm fast with a thermal actuator itself fast with said substrate via an anchor arrangement. Each nozzle assembly also includes a nozzle on the substrate defining an ink aperture over the ink inlet channel, with a nozzle rim of the nozzle being inwardly displaceable by the actuator to eject ink from the aperture. The nozzle has a skirt portion and an inwardly directed lip that forms a fluidic seal in a complementary manner between the ink aperture and the thermal actuator. | 10-23-2008 |
20080278546 | PRINTHEAD WITH TURBULENCE INDUCING FILTER FOR INK CHAMBER - An inkjet printhead with an array of ink chambers, each having a nozzle, an actuator for ejecting ink through the nozzle, an inlet opening allowing ink to refill the chamber and a filter structure at the inlet opening. The filter structure has rows of obstructions extending transverse to the flow direction through the opening. The rows are spaced along the flow direction and the obstructions in each row being spaced such that they are out of registration with the obstructions in an adjacent row with respect to the flow direction. Filtering the ink as it enters the chamber removes the contaminants and bubbles but it also retards ink flow into the chamber. The present invention uses a filter structure that has rows of obstructions in the flow path. The rows are offset with respect to each other to induce turbulence. This has a minimal effect on the nozzle refill rate but the air bubbles or other contaminants are likely to be retained by the obstructions. | 11-13-2008 |
20080284824 | THERMAL INKJET WITH MULTIPLE DROP VOLUMES PER NOZZLE - A pagewidth printhead has a controller. The printhead also has a plurality of microelectromechanical nozzle arrangements controlled by the controller. Each nozzle arrangement includes side walls located on a wafer substrate with a roof portion attached to said walls to define a printing fluid chamber, the roof portion defining an ejection port. Each arrangement also includes an inlet defined in the substrate to supply the fluid chamber with printing fluid, and a plurality of heater elements suspended between the side walls in the fluid chamber, so that when electrical actuation energy is applied to respective heater elements a vapour bubble is formed in the fluid leading to a pressure increase in the chamber thereby ejecting the fluid via the ejection port. The controller is configured to actuate respective heater elements individually to facilitate weighted ink drop volumes to be ejected from the nozzle arrangement. | 11-20-2008 |
20080303873 | PRINTHEAD WITH RECIPROCATING CANTILEVERED THERMAL ACTUATORS - A printhead is provided for an inkjet printer. The printhead includes a wafer assembly supporting rows of ink ejection nozzles. Each nozzle includes a nozzle structure defining a nozzle chamber in fluid communication with an ink ejection port. A cantilevered thermal actuator terminates in a free end over an ink supply channel. The thermal actuator includes a serpentine heater layer connected to a CMOS drive circuitry layer of the wafer assembly. The CMOS drive circuitry layer is configured to actuate the thermal actuator and reciprocate the actuator to eject ink in the nozzle chamber out through the ink ejection port. | 12-11-2008 |
20080309731 | INK JET PRINTING HEAD - A printing head is provided in which a distance between an ejection port face of the printing head and a print medium is reduced to improve an ink ejection accuracy during a printing operation. The printing head of the present invention is a back shooting-type printing head. The heater and an electrode connected thereto are formed at the back face of the substrate. The electrode and an in-support-base wiring for supplying electricity to the heater via the electrode are connected to each other at the back face side of the substrate. The substrate and the support base have therebetween a liquid chamber wall member including therein a space. The substrate, the support base, and the liquid chamber wall member constitute a liquid chamber that communicates with the ejection port and that stores ink supplied to the ejection port. | 12-18-2008 |
20080316276 | PRINTHEAD INTEGRATED CIRCUIT HAVING AN INK EJECTION MEMBER WITH A LAMINATED STRUCTURE - A printhead integrated circuit (IC) for an inkjet printer. The printhead IC has a wafer substrate with drive circuitry and a plurality of nozzle arrangements located thereon. Each nozzle arrangement includes nozzle chamber structures defining a nozzle chamber and an ink ejection nozzle in fluid communication with said nozzle chamber, as well as an elongate actuator attached to the substrate for displacement towards and away from the substrate in response to actuating signals from the drive circuitry. Each arrangement also includes an ink ejection member attached to the actuator, the ejection member being positioned for acting on ink within the nozzle chamber to eject a drop of ink from the ink ejection nozzle. Each elongate actuator further includes an actuator arm of a laminated structure comprising a resiliently flexible inner layer, a conductive layer and a compensation layer, the inner layer being interposed between the conductive and compensation layers. | 12-25-2008 |
20090009562 | INKJET PRINTER HEAD AND METHOD TO MANUFACTURE THE SAME - An inkjet printer head includes a substrate, an insulating layer having a groove and disposed on the substrate, a heating member having a concavely curved upper surface and disposed on an upper portion of the groove, an electrode to make contact with the heating member to apply electric current to the heating member, a chamber layer disposed on the heating member, and a nozzle layer having one or more nozzles and disposed on the chamber layer. According to the inkjet printer head, the heating member has a curved structure to increase a length of the heating member, so that resistance of the heating member can be increased. Thus, the heating member can stably operate regardless of current variation applied thereto, and the printing work can be performed. | 01-08-2009 |
20090021561 | INKJET PRINT HEAD AND MANUFACTURING METHOD THEREOF - An inkjet print head and manufacturing method includes a substrate, an insulating layer formed on a surface of the substrate to have an electrode formation space, an electrode formed in the electrode formation space to be positioned on the same plane with the insulating layer, a heater formed on upper surfaces of the insulating layer and the electrode, and a passivation layer formed on the insulating layer and the heater. The heater is formed to be flat on the insulating layer and the electrodes, thereby reducing the thickness of the passivation layer. Further, copper having relatively high electric conductivity is used as a material of the electrodes, which apply current to the heater to generate heat, instead of aluminum, thereby increasing a degree of freedom in the thickness of the electrodes. Further, uniform current can be applied to the respective heaters at different positions in single firing and full firing of ink, thereby reducing entire input energy and also improving ink ejection stability and reliability of the inkjet print head. | 01-22-2009 |
20090033721 | INKJET PRINTER WITH UNIT CELLS HAVING SUSPENDED HEATER ELEMENTS - Provided is an inkjet printer having a printhead with a plurality of unit cells. Each unit cell includes a wafer substrate having a layer of micro-electromechanical drive circuitry, with a dielectric layer on the drive circuitry layer, and a passivation layer on the dielectric layer, the passivation layer defining a plurality of vias. Each unit cell also has sidewalls located on the passivation layer with a nozzle plate so that the nozzle plate and the sidewalls together form an ink chamber, as well as a heater element suspended from the sidewalls in said ink chamber. The heater element is electrically connected to the drive circuitry layer through the vias, the unit cell having an ink channel defined through the wafer substrate ending in an ejection nozzle in the nozzle plate. The vias through the passivation layer correspond with contact electrodes defined on the heater element, the vias forming a grid of apertures through said passivation layer. | 02-05-2009 |
20090079797 | LIQUID EJECTION HEAD, LIQUID EJECTION APPARATUS AND METHOD OF MANUFACTURING LIQUID EJECTION HEAD - A liquid ejection head includes: an ejection port through which liquid is ejected; a liquid chamber which is connected to the ejection port, the liquid chamber being filled with the liquid; a pressurization device which is arranged on a wall of the liquid chamber, the pressurization device pressurizing the liquid in the liquid chamber; and a movable member which has a free end on a side of the ejection port and a fixed end on a side opposite to the ejection port, the free end being arranged at a prescribed distance from the wall of the liquid chamber so as to face the wall of the liquid chamber, the movable member including a first layer that is an internal layer, and second and third layers that are respectively arranged on both surfaces of the first layer, the second and third layers having a stress lower than the first layer. | 03-26-2009 |
20090102892 | PRINTHEAD ASSEMBLY WITH SYMMETRICAL TRI-LAYER OUTER SHELL LAMINATE - A printhead assembly for an inkjet printer comprises an outer shell of a hot rolled tri-layer laminate of two different metals; a core element within the shell, the core element defining four separate ink reservoirs; a printhead constructed using MEMS techniques to provide ink nozzles, chambers and actuators; and a micro molding for distributing ink from the ink reservoirs to the printhead. The tri-layer shell is configured such that the effective coefficient of thermal expansion of the shell as a whole is substantially equal to that of silicon, and the outer layers of the tri-layer laminate are symmetrically disposed around a central layer thereof. | 04-23-2009 |
20090109261 | ELEMENT SUBSTRATE, PRINTHEAD, AND HEAD CARTRIDGE - This invention achieves both a small-size element substrate and high electrical efficiency when a plurality of printing element arrays having the same discharge amount exist on a single element substrate, and transistors which form driver arrays corresponding to the respective printing element arrays are formed at different array densities including transistors which form a driver array corresponding to a printing element array having a different discharge amount. The area of the transistor of the first driver array corresponding to the first printing element array is set larger than that of the transistor of the second driver array corresponding to the second printing element array. The wiring width of the first power supply wiring pattern corresponding to the first printing element array in a direction perpendicular to the printing element array is set smaller than that of the second power supply wiring pattern corresponding to the second printing element array. | 04-30-2009 |
20090115819 | MICRO-ELECTROMECHANICAL FLUID EJECTION MECHANISM HAVING A SHAPE MEMORY ALLOY ACTUATOR - Provided is a micro-electromechanical fluid ejection mechanism. The mechanism includes a substrate defining an ink passage in fluid communication with a tapered ink chamber having an ink ejection port, as well as a shape memory alloy (SMA) actuator arranged within the chamber. The actuator is configured to straighten when heated and to return to a bent state upon subsequent cooling to facilitate ejection of ink via the ejection port. | 05-07-2009 |
20090122117 | NOZZLE ASSEMBLY WITH LEVER ARM AND THERMAL BEND ACTUATOR - A nozzle assembly is provided for an inkjet printhead. The nozzle assembly includes a substrate assembly defining an ink inlet. A nozzle extends from the substrate assembly in register with the ink inlet and defines an opening through which ink can be ejected. A lever arm extends from the nozzle. A thermal bend actuator assembly is mounted to the substrate assembly and engages with the lever arm so that, upon actuation, the lever arm moves and ink within the nozzle is ejected out through the opening. | 05-14-2009 |
20090141087 | Thermal Inkjet Printhead Chip Structure and Manufacturing Method for the same - A thermal inkjet printhead chip structure includes a substrate, an oxide layer formed on the substrate, at least one driver circuitry each including a source, a drain and a gate and formed on the substrate and further surrounded by the oxide layer, a dielectric layer, a buffer layer, a resistive layer and a conductive layer. The dielectric layer is formed on the driver circuitry and has openings formed therethrough to expose the source and drain. The buffer layer is formed on the dielectric layer, covering the source and drain and connected to the source and drain. The resistive layer is formed on the buffer layer and has at least one heating area. The resistive layer extends above the source and drain and is connected to the source and drain. The conductive layer is formed on the resistive layer and exposes the heating area. A manufacturing method also is provided. | 06-04-2009 |
20090141088 | Inkjet Printhead Integrated Circuit - An inkjet printhead integrated circuit includes a substrate. A drive circuitry layer is positioned on the substrate, the substrate and the drive circuitry layer defining a plurality of ink inlet channels. Nozzle chamber walls and roofs spanning the nozzle chamber walls are positioned on the substrate to define nozzle chambers in fluid communication with respective ink inlet channels, the roofs defining respective ink ejection ports. Ink ejection members are positioned in respective nozzle chambers and are displaceable with respect to the roofs to eject ink from the ink ejection ports. Fulcrum formations are fast with the substrate and each fulcrum formation has an effort formation arranged on one side and a load formation on an opposite side. Each ink ejection member is fast with a respective load formation. Thermal actuators are outside of and associated with respective nozzle chambers and are connected to the drive circuitry layer to move with respect to the substrate on receipt of electrical signals from the drive circuitry layer. Each effort formation is fast with a respective thermal actuator such that reciprocal movement generated by the thermal actuators results in reciprocal movement of the ink ejection members and subsequent ink drop ejection from the ink ejection ports. | 06-04-2009 |
20090141089 | Ink Jet Nozzle Assembly Having Layered Ejection Actuator - An ink jet nozzle assembly is provided having a wafer substrate defining an ink supply passage, a drive circuitry layer formed on the wafer substrate, an ink chamber structure on the drive circuitry layer, the ink chamber structure defining an ink chamber in fluid communication with the ink supply passage and an ink ejection port, and a layered actuator having a first layer electrically coupled to the drive circuitry layer so that the drive circuitry layer can electrically actuate the actuator to thereby eject ink from the ink ejection port. | 06-04-2009 |
20090141090 | Unit Cell For A Thermal Inkjet Printhead - A unit cell for a thermal inkjet printhead includes a substrate portion that defines an ink supply passage, Drive circuitry and interconnect layers are positioned on the substrate portion. A nozzle plate defining a nozzle is provided. Side walls depend from the nozzle plate and are positioned on the substrate portion to define an ink chamber. A heater element is connected to the drive circuitry and is positioned intermediate the nozzle plate and the substrate portion. The heater element is suspended in the ink chamber in alignment with the nozzle and is shaped to be symmetrical about two planes that intersect along an axis extending through a centre of the nozzle. | 06-04-2009 |
20090153623 | INKJET PRINTHEAD AND METHOD OF MANUFACTURING THE SAME - An inkjet printhead and a method of manufacturing the same. The inkjet printhead includes a substrate, a chamber layer to define an ink chamber on an upper portion of the substrate, and an adhesive portion to adhere to the substrate and the chamber, wherein the adhesive portion is formed of a phenolic sensitive resin. | 06-18-2009 |
20090160912 | SELF-COOLING HIGH NOZZLE DENSITY INK JET NOZZLE ARRANGEMENT - An inkjet printhead having a high density array of micro-electromechanical nozzles arrangements. Each arrangement comprises side walls located on a wafer substrate with a roof layer deposited on said walls to define an ink chamber, the roof layer defining a nozzle aperture; an inlet defined in the substrate to supply the ink chamber with printing fluid; and at least one heater element having a mass of less than 250 picograms suspended between the side walls in the chamber, the heater element operable to form a vapour bubble when electrical actuation energy of less than 120 nanojoules is applied thereto, said heater element having an annular shape with a point of collapse of the bubble near a centre thereof. The inlet, heater element and nozzle aperture are configured such that all heat generated in the ink chamber by the heater element per actuation is negated completely between actuations by an intake of unheated ink into the ink chamber through the inlet and an expulsion of heated ink from the ink chamber through the nozzle aperture. | 06-25-2009 |
20090195621 | Inkjet Nozzle Arrangement Having Interleaved Heater Elements - An inkjet nozzle arrangement is provided having a wafer defining an ink chamber for holding ink and a chamber roof covering the ink chamber. The chamber roof has an ink ejection port supported by a plurality of outwardly extending bridge members and a plurality of elongate heater elements interleaved between the bridge members for causing ejection of ink held in the ink chamber through the ink ejection port. | 08-06-2009 |
20090213186 | Inkjet Printhead Having Plural Nozzle Arrangements Grouped In Pods - An inkjet printhead has a plurality of nozzle arrangements. Each nozzle arrangement comprises an ink chamber having an ink supply channel and an ink ejection port; an ink spreading prevention rim provided around and spaced apart from the ink ejection port to define a pit between the ink ejection port and the ink spreading prevention rim; and a thermal actuator mechanism configured to operatively eject ink from the chamber via the ejection port. The plurality of nozzle arrangement are grouped into pods, each pod having two rows of nozzle arrangements spatially staggered with respect to each other. | 08-27-2009 |
20090237460 | Inkjet Printhead With Thermal Actuator Coil - Provided is a printhead for an inkjet printer. The printhead has a plurality of micro-electromechanical ejection mechanisms arranged in a wafer substrate, with each mechanism having chamber walls and a roof formed on top of said substrate to define an ink chamber. One wall of the chamber defines a slot therein. The mechanism also includes an ink supply channel defined through the substrate to said chamber. The mechanism includes a bi-layer thermal actuator coil fast with the substrate and ending in a strut extending through the slot, said strut fast with a paddle device within the chamber. | 09-24-2009 |
20090237461 | INK EJECTION NOZZLE ARRANGEMENT - A printhead is provided for an inkjet printer. The printhead includes a wafer assembly defining a plurality of spaced apart groups of ink supply channels and a plurality of groups of ink ejection nozzle arrangements in fluid communication with respective ink supply channel groups. Each ink ejection nozzle arrangement includes a nozzle chamber structure mounted to the wafer assembly. Each ink ejection nozzle arrangement also defines a nozzle chamber for receiving ink from an ink supply channel and a nozzle rim through which ink in the nozzle chamber can be ejected. An anchor extends from the wafer assembly in a location external to the nozzle chamber. An elongate thermal actuator mechanism extends from the anchor and into the nozzle chamber. | 09-24-2009 |
20090237462 | NOZZLE ARRANGEMENT WITH SEALING STRUCTURE - The present invention relates a printhead for an inkjet printer. The printhead has a plurality of nozzle arrangements, with each arrangement having a substrate defining an ink inlet channel leading to a nozzle chamber in fluid communication with the ink inlet channel and an ink ejection port through which ink from the nozzle chamber is ejected. Each arrangement also includes an ink ejection paddle extending across the nozzle chamber between the ink inlet channel and the ink ejection port, and a thermal bend actuator configured to operatively actuate the paddle. Also included is a sealing structure interposed between a working end of the actuator arm and a proximal end portion of the paddle. | 09-24-2009 |
20090237463 | Inkjet Printhead With Moving Nozzle Openings - A printhead is provided for an inkjet printer. The printhead includes a substrate assembly defining ink inlet channels. Nozzles openings formed on the substrate assembly are in fluid communication with respective ink inlet channels. Lever arms extend from respective nozzles openings and thermal bend actuators are coupled to respective lever arms and anchored to the substrate assembly. The thermal bend actuators are configured to move the nozzles towards the substrate assembly to eject ink there through. | 09-24-2009 |
20090244198 | INK JET RECORDING HEAD, MANUFACTURING METHOD THEREOF, AND ELECTRON DEVICE - An ink jet recording head includes a substrate, having a front surface and a back surface opposite from the front surface, provided above the front surface with an energy generating element for generating energy used for ejecting ink; an ink supply port provided so as to penetrate between the front surface and the back surface of the substrate; a first layer provided on or above the front surface of the substrate; a protection layer which is provided so as to coat a wall of the substrate defining the ink supply port and which continuously extends onto the first layer; and a second layer located above the front surface of the substrate and including a portion provided on the protection layer and another portion provided on the first layer by penetrating through the protection layer. | 10-01-2009 |
20090273647 | INKJET PRINT HEAD AND MANUFACTURING METHOD THEREOF - An inkjet print head includes a substrate formed with a feed hole through which ink is transferred, and a notch prevention layer covering an area on the substrate where the feed hole is to be formed. Plasma electrons flown into the feed hole while the hole is formed on the substrate through dry etching can move through the notch prevention layer. As a result, corrosion of the substrate around the feed hole by the electrons can be prevented, thereby achieving a uniform width of the feed hole. | 11-05-2009 |
20090273648 | INKJET PRINTHEAD AND MANUFACTURING METHOD THEREOF - An inkjet printhead and a manufacturing method thereof. In the manufacturing method, a chip and a porous material are provided. A heating layer is formed on the chip. A conductive layer is formed on the heating layer, and includes a notch therein to define a heating area. A chamber for storing liquid is formed on the heating area, and includes a first side and a second side. The first side faces the heating area, and the second side is connected to the first side. The chamber is formed with an exit, from which the liquid is dispensed, on the second side. The porous material is disposed on the chamber, and the liquid flows to the chamber through the porous material. | 11-05-2009 |
20090273649 | Inkjet Printhead With Nozzle Layer Defining Etchant Holes - The current invention provides for an inkjet printhead for an inkjet printer. The inkjet printhead includes a wafer substrate defining an ink supply channel. Side wall portions extend away from one surface of the wafer substrate, and a nozzle layer supported on the side wall portions and extending parallel to said one surface of the wafer substrate. The nozzle layer and the side wall portions define an array of nozzle chambers for receiving ink. The nozzle layer defines ink ejection ports and etchant holes. The etchant holes are of sufficient diameter to retain ink in the nozzle chamber by surface tension. Each nozzle chamber has a thermal actuators cantilevered on the wafer substrate. The actuator partitions the nozzle chamber and has a heater layer which produces thermal expansion of said actuator upon activation. | 11-05-2009 |
20090278898 | METHOD OF MANUFACTURING INKJET PRINTHEAD AND INKJET PRINTHEAD MANUFACTURED USING THE SAME - A method of manufacturing an inkjet printhead includes forming a heater and an electrode on a substrate, forming a flow path forming layer by coating a first negative photoresist composition on the substrate, forming a sacrifice layer, planarizing the flow path forming layer and the sacrifice layer, forming a nozzle layer by coating a second negative photoresist composition on the flow path forming layer, forming an ink feed hole in the substrate, and eliminating the sacrifice layer, wherein the first and second negative photoresist compositions include a prepolymer which comprises one selected from the group consisting of a glycidyl ether functional group, a ring-opened glycidyl ether functional group, and an oxytein functional group in a monomer repeat unit, and one selected from the group consisting of a phenol novolac resin-based backbone, a bisphenol-A-based backbone, a bisphenol-F-based backbone, and an alicyclic backbone; a cationic initiator; a solvent; and a plasticizer. | 11-12-2009 |
20090278899 | Printhead Integrated Circuit Comprising Polymeric Cover Layer - A printhead integrated circuit comprises a substrate having drive circuitry and a plurality of nozzle assemblies positioned on the substrate. Each nozzle assembly has a moving portion moveable relative to a stationary portion for ejection of ink. The printhead integrated circuit is covered with a polymeric layer. The polymeric layer covers a gap defined between each moving portion and each stationary portion. | 11-12-2009 |
20090289997 | Inkjet Printhead Employing Nozzle Paddle Ink Ejecting Actuator - An inkjet printhead includes a substrate defining a fluid chamber, the fluid chamber having a fluid outlet nozzle and a fluid supply channel respectively defined in opposite walls of the chamber; a thermal actuator extending from outside of the fluid chamber into the fluid chamber via an aperture in a sidewall of the fluid chamber; and a nozzle paddle terminating the thermal actuator and positioned within the fluid chamber, the nozzle paddle operatively displaceable upwards by the thermal actuator to eject ink from within the fluid chamber out through the fluid outlet nozzle. The fluid chamber is provided with a rim extending around an inner surface of the side wall, the rim partially protruding from the inner surface into the fluid chamber. The rim is provided with a rim edge angled upwards towards the fluid outlet nozzle. The nozzle paddle is spaced from the rim edge to define a gap between an edge of the nozzle paddle and the rim edge, the gap facilitating ink flow from a side of the nozzle paddle facing the fluid supply channel to a side of the nozzle paddle facing the fluid outlet nozzle. | 11-26-2009 |
20090309933 | LIQUID EJECTING HEAD - A compact print head enabling high-quality, high-speed printing is provided. A liquid ejecting head includes: a substrate, having elements that generate energy used to eject liquid from ejection openings, and provided with a liquid supply port that communicates with a surface of the substrate having the elements and a opposite surface thereof; a member, provided above the surface of the substrate, and having walls of a liquid flow path that communicates with ejection openings and the supply port; an insulating layer, provided so as to cover the supply port, and provided with a plurality of through-holes; and a conducting layer electrically coupled to the elements, and provided within the insulating layer so as to be insulated with respect to the liquid. | 12-17-2009 |
20090315951 | PRINTHEAD HAVING ISOLATED HEATER - A liquid ejector includes a substrate, a heating element, a dielectric material layer, and a chamber. The substrate includes a first surface. The heating element is located over the first surface of the substrate such that a cavity exists between the heating element and the first surface of the substrate. The dielectric material layer is located between the heating element and the cavity such that the cavity is laterally bounded by the dielectric material layer. The chamber, including a nozzle, is located over the heating element. The chamber is shaped to receive a liquid with the cavity being isolated from the liquid. | 12-24-2009 |
20090315952 | SUBSTRATE FOR INK JET HEAD AND INK JET HEAD - A substrate for an ink jet head is provided with a plurality of energy generating members generating energy used for discharging an ink, an electrode pad which is arranged near a side of the substrate, and is for electrically connecting to an outside of the substrate, a plurality of electrode wirings for electrically connecting the plurality of energy generating members and the electrode pad, and a plurality of resistance elements which are respectively provided at the plurality of electrode wirings. Resistance values of the plurality of resistance elements differ from one another according to resistance values of the electrode wirings provided with the respective resistance elements. | 12-24-2009 |
20090315953 | LIQUID EJECTION HEAD AND METHOD OF MANUFACTURING THE SAME - Provided is a method of manufacturing a liquid ejection head having an element which generates energy utilized for ejecting liquid and an electrode layer electrically connected the element. The method includes the steps of: providing an electrode layer on a substrate, a width of one portion of the electrode layer being smaller than that of another portion near the one portion; providing a resist layer on a part of the electrode layer by any one of a screen printing method and a dispense method in such a manner that an end of the resist layer is positioned at the one portion; providing another layer on another part excluding the part of the electrode layer by utilizing the resist layer as a mask; and removing the resist layer. | 12-24-2009 |
20090315954 | LIQUID EJECTION HEAD - On the liquid ejection head substrate, an upper protective layer, as well as coming into contact with the resin layer which configures a path forming member such as a ejection opening, comes into contact with ink in an heat generating portion inside the channel formed. The upper protective layer contains iridium and silicon. The upper protective layer is configured so that, at a surface in contact with the ink and resin layer, Ir | 12-24-2009 |
20090315955 | LIQUID EJECTION HEAD - It is an objective of the present invention to provide an ink jet printing head substrate by which a high adhesion can be obtained between an electrode layer and a nozzle formation member and the corrosion or electrolysis for example of a electrode due to the contact between the electrode and ink can be reduced. To realize this, the present invention includes: an electrode layer for supplying power to a heat-generating portion that is provided on a substrate and that generates thermal energy for ejecting ink; and a resin layer provided on the electrode layer via a nickel-containing layer. The electrode layer includes precious metal as a main component. The nickel-containing layer consists of gold-nickel alloy containing nickel. | 12-24-2009 |
20090315956 | LIQUID EJECTION HEAD AND METHOD OF MANUFACTURING THE LIQUID EJECTION HEAD - To provide a print head that simplifies the manufacture process of a print head and reduces the manufacturing cost while preventing the peeling-off between a substrate and a flow passage forming member in the print head, and a method of manufacturing the print head. In the print head of the present invention, a protective layer is formed in a flow passage forming member side portion in a heat generating portion | 12-24-2009 |
20100026765 | Inkjet Printhead With Narrow Printing Zone - An inkjet printhead includes a supporting wafer substrate; an array of drop ejection apparatuses formed in a first side of the supporting wafer substrate, the array of drop ejection apparatuses configured as pairs of rows of drop ejection apparatuses, each drop ejection apparatus including a chamber with a nozzle, and an actuator extending into the nozzle; and a common ink channel extending between each pair of rows of drop ejection apparatuses. Each chamber has a sidewall adjacent to the common ink channel, the side wall provided with a grill portion for facilitating an in-flow of ink from the common ink channel into the chamber, the grill portion adapted to further filter the ink flowing therethrough. | 02-04-2010 |
20100039478 | INKJET PRINTHEAD COMPRISING ACTUATOR SPACED APART FROM SUBSTRATE - An inkjet printhead comprising a substrate and a plurality of nozzle assemblies disposed on the substrate. Each nozzle assembly includes a nozzle chamber for containing ink and an actuator for ejecting an ink droplet from a nozzle aperture when a resistive element of the actuator is heated by an electrical current. The resistive element of the actuator is spaced apart from the substrate and suspended in ink contained in the nozzle chamber. | 02-18-2010 |
20100053277 | LIQUID EJECTION HEAD - A present invention provides a print head improving an ink refill speed to reduce the time from the end of ejection of ink droplets until the beginning of next ejection of ink droplets and maintaining the high quality of images obtained by printing. An ink jet print head has an ejection port portion | 03-04-2010 |
20100053278 | LIQUID-DISCHARGE-HEAD SUBSTRATE, METHOD OF MANUFACTURING THE SAME, AND LIQUID DISCHARGE HEAD - A method of manufacturing a liquid-discharge-head substrate is provided, which includes a plurality of elements for discharging liquid, and a heating member for heating the liquid-discharge-head substrate, the method including the steps of preparing a substrate having an insulating layer made of an insulating material provided on or above the substrate, providing a conductive layer made of a conductive material, and forming a conductive line being configured to supply current for driving the element and a part of a heating member by using the conductive layer. | 03-04-2010 |
20100073430 | Ink Jet Nozzle Arrangement With A Segmented Actuator Nozzle Chamber Cover - A nozzle arrangement for an inkjet printer comprises a nozzle chamber; an ink supply channel for supplying ink to the nozzle chamber; a cover for covering the nozzle chamber, the cover defining an ink ejection port through which ink is ejected; a plurality of thermal bend actuators radially arranged around the ink ejection port; and a plurality of heater elements each corresponding to one of the plurality of thermal bend actuators. Each heater element is provided at an end of a corresponding thermal bend actuator opposite the ink ejection port. | 03-25-2010 |
20100073431 | Nozzle Structure With Reciprocating Cantilevered Thermal Actuator - A nozzle structure for an inkjet printer printhead includes an ink ejection port; a nozzle chamber in fluid communication with the ink ejection port and an ink supply channel of the inkjet printer printhead; and a cantilevered thermal actuator terminating in a free end over the ink supply channel. The thermal actuator includes a serpentine heater layer connected to a CMOS drive circuitry layer of the printhead. The thermal actuator is adapted to reciprocate towards and away from the ink ejection port in response to signals from the drive circuitry layer. | 03-25-2010 |
20100073432 | Ink Jet Printhead Incorporating Heater Element Proportionally Sized To Drop Size - An inkjet printhead comprises a plurality of nozzles; a supply of printing fluid in fluid communication with the plurality of nozzles; and a plurality of heater elements corresponding respectively to each of the nozzles, the heater elements for heating the printing fluid to form a gas bubble for ejecting a drop of printing fluid of a predetermined volume from the nozzle. Each of the heater elements has an area proportional to the predetermined volume. The area being such that an amount of energy generated by each heater element to form the gas bubble is substantially equal to or less than an amount of energy absorbable by a drop of printing fluid having the predetermined volume. | 03-25-2010 |
20100097430 | Inkjet Printhead Nozzle Assembly Having A Raised Rim To Support An Ink Meniscus - A nozzle assembly for an inkjet printhead includes a substrate defining a nozzle chamber and an ink inlet channel in fluid communication with said chamber; a nozzle defined on the substrate and located over the nozzle chamber, said nozzle having a crown portion with a skirt portion depending from the crown portion, the skirt portion forming a first part of a peripheral wall portion of the nozzle chamber, the nozzle surrounded by a raised rim for supporting a meniscus of a body of ink in the nozzle chamber; and an actuator with a connecting arm fast with the nozzle to operatively displace the nozzle towards the substrate. The nozzle is substantially hexagonally shaped. | 04-22-2010 |
20100110146 | HEATER STACK AND METHOD FOR MAKING HEATER STACK WITH CAVITY BETWEEN HEATER ELEMENT AND SUBSTRATE - A heater stack includes first strata configured to support and form a fluid heater element responsive to repetitive electrical activation and deactivation to produce repetitive cycles of fluid ejection from an ejection chamber above the heater element and second strata overlying the first strata and contiguous with the ejection chamber to protect the heater element. The first strata includes a substrate with a cavity formed either in or above the substrate, a heater substrata overlying the cavity and substrate, and a decomposed layer of material between the substrate and heater substrata and processed to provide the cavity substantially empty of the layer of material such that the cavity provides a means which, during repetitive electrical activation, enables the heater element to transfer heat energy into the fluid in the ejection chamber for producing ejection of fluid therefrom substantially without transferring heat energy into the substrate. | 05-06-2010 |
20100110147 | Inkjet Nozzle Assembly With Thermal Bend Actuator Defining Part Of Nozzle Chamber Roof - An inkjet nozzle assembly includes a nozzle chamber having a floor and a roof, wherein moving portion of the roof is moveable towards the floor for ejection of ink. A thermal bend actuator defines part of the moving portion of the roof, and an active beam of the actuator defines an upper layer of the moving portion. | 05-06-2010 |
20100118092 | Printhead Nozzle Arrangement Having Variable Volume Nozzle Chamber - A printhead has a plurality of nozzle arrangements. Each arrangement includes a substrate defining an ink inlet aperture with a wall portion bounding the ink inlet aperture and a crown portion defining a nozzle opening; a skirt portion depending from the crown portion to form part of a peripheral wall of the nozzle assembly, the crown and skirt portions being displaceable with respect to the wall portion towards the substrate to alter a volume of a nozzle chamber defined by the wall, crown and skirt portions; and a thermal actuator interconnecting the crown and skirt portions with the substrate, the actuator for displacing the crown and skirt portions. The wall portion and skirt portions are configured to define a fluidic seal to inhibit the egress of ink during such displacement. The substrate further includes a layer of micro-electromechanical drive circuitry for actuating the actuator. The actuator has a first active beam arranged above a second passive beam, the beams fabricated from a conductive ceramic material with an electrical connection between the active beam and the drive circuitry established via conductive pads. | 05-13-2010 |
20100123759 | LIQUID EJECTION HEAD, LIQUID-EJECTION HEAD SUBSTRATE, LIQUID EJECTING APPARATUS INCLUDING LIQUID EJECTION HEAD, AND METHOD OF CLEANING LIQUID EJECTION HEAD - A liquid ejection head includes a liquid-ejection head substrate including an element, which generates thermal energy used for ejecting a liquid from an ejection port, and a protective layer, which covers at least the element, and in which first layers and second layers are alternately stacked; a flow passage member which defines a wall of a flow passage communicating with the ejection port; and a flow-passage electrode disposed in the flow passage. | 05-20-2010 |
20100128091 | INKJET PRINTHEAD AND METHOD OF MANUFACTURING THE SAME - Disclosed are an inkjet printhead and a method of fabricating the same. The inkjet printhead can include a substrate; a chamber layer formed on the substrate and a nozzle layer formed on the chamber layer. The chamber layer defines one or more ink chambers in which ink to be ejected may be accommodated. The nozzle layer includes one or more nozzles through which the ink from the ink chambers are ejected. The nozzle layer may be formed of a cured product of a photosensitive dry film that includes an light absorption material. | 05-27-2010 |
20100149280 | SUBSTRATE FOR INK EJECTION HEADS, INK EJECTION HEAD, METHOD OFMANUFACTURING SUBSTRATE, AND METHOD OF MANUFACTURING INK EJECTION HEAD - A liquid ejection head according to the present invention includes a heat-generating resistor layer, a first electrode layer, an insulating layer extending over the heat-generating resistive layers and the first electrode layer, and a second electrode layer that has a first portion which extending through the insulating layer and which is electrically connected to the first electrode layer and also has a second portion which is not in contact with the insulating layer. The second portion has a space or a piece of resin disposed between the insulating layer and the second electrode layer. | 06-17-2010 |
20100149281 | LIQUID EJECTION HEAD SUBSTRATE AND LIQUID EJECTION HEAD - A liquid ejection head substrate includes a primary conductive layer; an insulating layer; a pair of secondary conductive layers; a first connecting portion where the primary conductive layer is electrically connected to the secondary conductive layers, the first connecting portion penetrating the insulating layer; and a second connecting portion whose contact area is smaller than that of the first connecting portion. In the secondary conductive layers, a voltage is applied such that a first secondary conductive layer has a higher potential than a second secondary conductive layer. | 06-17-2010 |
20100149282 | PRINTHEAD NOZZLE CELL HAVING PHOTORESIST CHAMBER - A nozzle cell of a printhead is provided which has a multi-layer substrate defining a fluid inlet, side walls extending from the substrate around the fluid inlet and comprising walls of silicon nitride encapsulating hardened photoresist, an apertured roof supported by the side walls to define a chamber, and a heater within the chamber, the heater heating the fluid in the chamber so that bubbles are generated therein to cause ejection of the fluid from a nozzle defined with the apertured roof. | 06-17-2010 |
20100165054 | Fin-Shaped Heater Stack And Method For Formation - A fin-shaped heater stack includes first strata configured to support and form fluid heater elements responsive to repetitive electrical activation and deactivation to produce repetitive cycles of ejection of a fluid, and second strata on the first strata to protect the fluid heater elements from adverse effects of the repetitive cycles of fluid ejection and of contact with the fluid. The first strata include a substrate having a front surface, and heater substrata supported on the front surface. The heater substrata have opposite facing side surfaces which extend approximately perpendicular to the front surface and an end surface interconnecting the side surfaces which extends approximately parallel to the front surface such that the heater substrata is provided in either an upright or inverted fin-shaped configuration on the substrate with the fluid heater elements forming the opposite facing side surfaces of the heat substrata. | 07-01-2010 |
20100165055 | Planar Heater Stack And Method For Making Planar Heater Stack - A heater stack includes first strata configured to form a fluid heater element responsive to energy from repetitive electrical activation and deactivation to fire repetitive cycles of heating and ejecting fluid from an ejection chamber above the fluid heater element and second strata overlying the first strata and contiguous with the ejection chamber to provide protection of the fluid heater element. The first strata includes a substrate and a heater substrata overlying the substrate and including a resistive layer having lateral portions spaced apart, a central portion extending between the lateral portions and defining the fluid heater element, and transitional portions interconnecting the central portion and lateral portions and elevating the central portion relative to the lateral portions and above the substrate to form a gap between the lateral portions and between the central portion and substrate insulating the substrate from the fluid heater element and a planar upper surface on the heater substrata. | 07-01-2010 |
20100201751 | INKJET NOZZLE ASSEMBLY WITH LOW DENSITY SUSPENDED HEATER ELEMENT - An inkjet nozzle assembly comprises: a nozzle chamber for containing ink, the nozzle chamber having a nozzle opening defined in a roof thereof; and a bubble-forming heater element positioned in the nozzle chamber. The heater element is suspended in the nozzle chamber and parallel with a plane of the roof. The heater element is comprised of solid material having a total mass of less than 10 nanograms. | 08-12-2010 |
20100201752 | Micro-Fluid Ejection Heads with Multiple Glass Layers - Methods for fabricating micro-fluid ejection heads and micro-fluid ejection heads are provided herein, such as those that use non-conventional substrates. One such micro-fluid ejection head includes a substrate having first and second glass layers disposed adjacent to a surface thereof and a plurality of fluid ejection actuators disposed adjacent to the second glass layer. The first glass layer is thicker than the second glass layer and the second glass layer has a surface roughness of no greater than about 75 Å Ra. | 08-12-2010 |
20100214367 | PRINTHEAD HAVING NOZZLES WITH STACKED CAPACITIVE ACTUATORS - A printhead is provided having a fluid ejection nozzles which each have a substrate, a layer of drive circuitry deposited on the substrate, and subsequent etchant layers deposited on the drive circuitry to define a nozzle chamber with walls and a roof structure defining a fluid ejection port. Each nozzle also has a stacked capacitive actuator arranged in the chamber. The actuator has alternate electrode plates sandwiched between a compressible polymer, wherein activation of the stacked actuator draws the electrode plates together to compress the polymer storing energy therein, with subsequent de-activation releasing the energy to eject fluid within the chamber from the ejection port. | 08-26-2010 |
20100245486 | RECORDING ELEMENT SUBSTRATE, METHOD OF MANUFACTURING THE RECORDING ELEMENT SUBSTRATE, AND LIQUID EJECTION HEAD - A recording element substrate includes a substrate; an insulating layer disposed on the substrate; a plurality of heating portions which are arranged on the insulating layer and which produce thermal energy used to eject a liquid; and a plurality of heat conduction members, each being located between adjacent heating portions with respect to an arrangement direction of the heating portions, the heat conduction members being located between the substrate side principal surface of the insulating layer and the heating portion side principal surface of the insulating layer and having higher thermal conductivity than the insulating layer. The heat conduction members are in contact with a heat conduction layer which has higher thermal conductivity than the insulating layer. | 09-30-2010 |
20100277551 | MICRO-ELECTROMECHANICAL NOZZLE ARRANGEMENT HAVING CANTILEVERED ACTUATOR - A micro-electromechanical nozzle arrangement for an inkjet printhead includes a substrate defining an inverted pyramidal ink chamber with a vertex thereof terminating at an ink supply channel defined by the substrate, said substrate having a layer of CMOS drive circuitry; a roof structure connected to the drive circuitry layer and covering the ink chamber, the roof structure defining a fluid ejection nozzle rim above said chamber; a plurality of actuators fast with and displaceable with respect to the roof structure, the actuators radially spaced about the nozzle rim between the guide rails, each actuator having a serpentine heater element configured to expand thermally upon receiving current from the drive circuitry thereby moving said actuators into the chamber and increasing a fluid pressure inside the chamber to eject a drop of ink via the ejection nozzle, wherein each actuator is cantilevered to a heater element in a bendable manner; and a central arm which having metal and PTFE portions to provide structural support for the actuators. | 11-04-2010 |
20100295903 | INK EJECTION NOZZLE ARRANGEMENT FOR INKJET PRINTER - An ink ejection nozzle arrangement for an inkjet printer includes a wafer substrate with an etched ink chamber and ink channel leading to the chamber; ink ejection nozzle defined over the chamber with an ejection port etched therein; a dielectric actuator arm attached to the substrate via a post on the substrate, the arm having a heating means formed of an electrically conductive material attached at a lower portion thereof proximate the post, wherein the arm extends through a slot in the chamber; and paddle fast with the arm inside the chamber, the paddle interposed between the ink channel and the ejection port. The slot in the chamber defines corrugations to inhibit leaking of ink from the slot. | 11-25-2010 |
20100302320 | HEATER ASSEMBLY FOR PRINTHEAD - A heater assembly for a printhead is provided having a heating element including a heating layer and a non-heating layer, and a heat conduction means positioned in the middle of the non-heating layer so as to be spaced from the heating layer to conduct heat generated by the heating element away from the actuator assembly. | 12-02-2010 |
20100302321 | INKJET NOZZLE ASSEMBLY WITH MOVABLE CROWN AND SKIRT PORTION - A nozzle assembly for an inkjet printhead includes a substrate assembly defining an ink inlet aperture; a nozzle having an endless wall portion extending from the substrate assembly and a moveable crown portion from which a skirt portion depends, the nozzle defining a nozzle chamber in fluid communication with the ink inlet aperture and a nozzle opening in fluid communication with the nozzle chamber; an anchor extending from the substrate assembly; and a thermal bend actuator connected between the anchor and the nozzle via a lever arm, the thermal bend actuator operable to move the crown and skirt portions relative to the endless wall portion to eject ink from the nozzle opening. The endless wall portion defines an inwardly directed lip serving as a fluidic seal for inhibiting an escape of ink during displacement of the crown and skirt portions. | 12-02-2010 |
20110050807 | INKJET PRINTHEAD HAVING SELECTIVELY ACTUABLE NOZZLES ARRANGED IN NOZZLE PAIRS - An inkjet printhead includes a substrate having an array of nozzles grouped in nozzle pairs. Each nozzle pair has a common nozzle chamber and a single actuator configured to selectively eject ink from one or other of the nozzles in the nozzle pair. | 03-03-2011 |
20110063375 | EJECTION NOZZLE ARRANGEMENT HAVING DYNAMIC AND STATIC STRUCTURES - An ejection nozzle arrangement is provided having a fluid chamber having a wall and a fluid port, an arm extending through an aperture in the wall, a dynamic structure cantilevered from the wall adjacent the aperture, a static structure cantilevered from the wall adjacent the dynamic structure. The arm is connected to the dynamic and static structures at a point distal from the aperture such that thermal expansion of the dynamic structure moves the arm upwards in the chamber to eject fluid from the chamber through the port. | 03-17-2011 |
20110096124 | INKJET PRINTHEAD HAVING LOW-LOSS CONTACT FOR THERMAL ACTUATORS - An inkjet printhead that has a supporting substrate, a conductive layer deposited in a pattern on one side of the supporting substrate, an insulating layer deposited such that the conductive layer is between the insulating layer and the supporting substrate, an ink chamber supported on the supporting substrate such that the conductive layer is between the ink chambers and the supporting substrate, a nozzle in fluid communication with the ink chamber, a heater on the insulating layer configured to vaporize some ink in the ink chamber such that a droplet of ink is ejected through the nozzle, the heater having a resistive element extending between a pair of contacts and, at least one metallic via in each of the contacts respectively, the metallic vias extending through the insulating layer to establish and electrical connection between the conductive layer and the contacts. The insulating layer has a planar surface on which the heater is supported. | 04-28-2011 |
20110096125 | INKJET PRINTHEAD WITH NOZZLE LAYER DEFINING ETCHANT HOLES - An inkjet printhead for an inkjet printer includes a wafer substrate defining an ink supply channel therethrough; side wall portions extending away from a surface of the wafer substrate; a nozzle layer supported on the side wall portions and extending parallel to the surface of the wafer substrate, the nozzle layer and the side wall portions defining an array of nozzle chambers, the nozzle layer defining ink ejection ports and etchant holes, the etchant holes being of sufficient diameter to retain ink in the nozzle chamber by surface tension; and a plurality of thermal actuators cantilevered on the wafer substrate, each thermal actuator being respectively positioned in a nozzle chambers to partition the nozzle chamber. A portion of each thermal actuator facing away from a respective ink ejection port is hydrophobic to facilitate the forming of an air bubble between the thermal actuator and the wafer substrate. | 04-28-2011 |
20110221825 | LIQUID DISCHARGE HEAD SUBSTRATE AND LIQUID DISCHARGE HEAD - Performing a high-speed recording operation using a slender liquid discharge head substrate causes an uneven temperature distribution for each energy generating element because the center portion of the liquid discharge head substrate is more liable to accumulate heat than the end portion thereof, which may affect the quality of a recorded image. For this reason, the surface of the energy generating element which contacts liquid is separated into a first region and a second region in which a protection film is thicker than the one in the first region, and the area in the first region for the element positioned at the end portion of the array of the elements is made greater than that in the first region at the center portion thereof. | 09-15-2011 |
20110261115 | Capping Layer for Insulator in Micro-Fluid Ejection Heads - A micro-fluid ejection head has a resistor layer defining a heater element. An insulative layer underlies the heater element and a capping layer on the insulative layer substantially prevents ion mobility between the resistor and insulative layers. Resistance stability of the heater has been shown improved as has adhesion of the heater to the insulator. Representative layers include insulation of methyl silesquioxane (MSQ) in a thickness of about 5000 Angstroms or more, while the cap is a silicon nitride in a thickness of about 2000 Angstroms or less. Other capping layers include silicon carbide, silicon oxide or dielectrics. The resistor layer typifies TaAIN in a thickness of about 350 Angstroms, including overlying anode and cathode conductors that define the heater. Coating layers are also disclosed as are thermal barrier layers. | 10-27-2011 |
20110261116 | PRINTHEAD INCLUDING SECTIONED STIMULATOR/FILTER DEVICE - A jetting module includes a nozzle plate, a thermal stimulation membrane, and an enclosure. Portions of the nozzle plate define a nozzle. The thermal stimulation membrane includes a first portion and a second portion. The first portion of the membrane includes a heater. The second portion of the membrane includes a plurality of pores. The enclosure includes a wall that extends from the nozzle plate to the thermal stimulation membrane to define a liquid chamber positioned between the nozzle plate and the thermal stimulation membrane. The liquid chamber is in fluid communication with the nozzle. The liquid chamber is in fluid communication with the plurality of pores of the thermal stimulation membrane. | 10-27-2011 |
20110261117 | PRINTHEAD STIMULATOR/FILTER DEVICE PRINTING METHOD - A method for forming drops includes providing a jetting module that includes a nozzle plate, portions of the nozzle plate defining a nozzle; a thermal stimulation membrane including a plurality of pores and one or more heating elements; and an enclosure extending from the nozzle towards the thermal stimulation membrane, the enclosure defining a liquid chamber positioned between the nozzle and the thermal stimulation membrane, the liquid chamber being in fluid communication with each of the nozzle and the plurality of pores; providing liquid under pressure sufficient to cause the liquid to divide into a plurality of portions as the liquid flows through the thermal stimulation membrane; each portion of the liquid flowing through a pore of the plurality of pores; jetting an individual stream of the liquid through the nozzle; and causing a liquid drop to break off from the individual stream of the liquid by applying a pulse of thermal energy to each portion of the liquid as each portion of the liquid flows through a respective one of the plurality of pores. | 10-27-2011 |
20110261118 | PRINTHEAD INCLUDING INTEGRATED STIMULATOR/FILTER DEVICE - A jetting module includes a nozzle plate, a thermal stimulation membrane, and an enclosure. Portions of the nozzle plate define a nozzle. The thermal stimulation membrane includes a plurality of pores. At least one of the plurality of pores overlaps the nozzle when viewed from a direction through the nozzle. The enclosure includes a wall that extends from the nozzle plate to the thermal stimulation membrane to define a liquid chamber positioned between the nozzle plate and the thermal stimulation membrane. The liquid chamber is in fluid communication with the nozzle. The liquid chamber is in fluid communication with the plurality of pores of the thermal stimulation membrane. | 10-27-2011 |
20110316935 | LIQUID EJECTION HEAD - A liquid ejection head including: a flow channel unit including a nozzle plate, and a flow-channel-containing substrate, the nozzle plate and the flow-channel-containing substrate being laminated, a head case formed with a common liquid flow channel configured to supply the liquid to the reservoir and joined to the flow-channel-containing substrate on the side opposite from the nozzle plate; a heater configured to heat the nozzle plate; a head cover heated by the heater and formed with a bottom surface portion opposing the nozzle plate on the side opposite from the head case, wherein a distal end of the head cover comes into abutment with a portion between an area of the nozzle plate corresponding to the reservoir and an area formed with the nozzle row, and a void is formed between the area of the nozzle plate corresponding to the reservoir and the head cover. | 12-29-2011 |
20110316936 | GALLIUM NAPHTHALOCYANINE SALTS EXHIBITING REDUCED KOGATION - A sulfonated dye salt of formula (II): | 12-29-2011 |
20120007924 | INK EJECTION NOZZLE WITH THERMAL ACTUATOR COIL - A printhead for an inkjet printer is disclosed. The printhead has ink nozzles formed on a print face of the printhead. Each ink nozzle has an ink chamber with an ink ejection port and an ink inlet port. A paddle device is arranged inside each chamber. Each ink nozzle further has a bi-layer thermal actuator coil with a fee end connected to the paddle device. Heating of the thermal actuator coil displaces the paddle device, causing ejection of an ink droplet through the ink ejection port. | 01-12-2012 |
20120019602 | PRINTING NOZZLE ARRANGEMENT HAVING FAULT DETECTOR - A printing nozzle arrangement is provided having an electrical current source, a fluid chamber having a fluid inlet and fluid ejection port, a heating element within the chamber electrically connected to the electrical current source, and a microprocessor. The heating element is configured such that electrical current applied by the electrical current source at a predetermined energy level causes resistive heating and ejection of the fluid from the fluid ejection port. The microprocessor is configured to test for faulty operation of the heating element by causing application of electrical current for a predetermined duration which does not result in fluid ejection. When faulty operation is determined, the microprocessor is configured to cause application of electrical current at an energy level significantly greater than the predetermined energy level in an attempt to clear fluid blockages associated with the chamber. | 01-26-2012 |
20120056942 | EJECTION NOZZLE ARRANGEMENT HAVING DYNAMIC STRUCTURE - An ejection nozzle arrangement is provided having a fluid chamber, an arm extending through an aperture in the chamber, and a dynamic structure cantilevered from the chamber adjacent the aperture. The arm is connected to the dynamic structure at a point distal from the aperture such that thermal expansion of the dynamic structure moves the arm upwards in the chamber to eject fluid from the chamber. | 03-08-2012 |
20120056943 | FLUID-EJECTION PRINTHEAD DIE HAVING AN ELECTROCHEMICAL CELL - A fluid-ejection printhead die includes a fluid-ejection firing element and an electrochemical cell. The fluid-ejection firing element is to cause droplets of fluid to be ejected from the fluid-ejection printhead die. The electrochemical cell is to measure an electrical property of the fluid. The fluid-ejection firing element and the electrochemical cell are both part of the fluid-ejection printhead die. | 03-08-2012 |
20120075386 | LIQUID DISCHARGE HEAD AND MANUFACTURING METHOD OF THE SAME - A liquid discharge head comprises: a liquid discharge head substrate including an element row in which a plurality of energy generating elements for generating thermal energy for use in discharging liquid are arranged; and a discharge port member corresponding to each of the plurality of energy generating elements, the discharge port members including a plurality of walls in contact with the liquid discharge head substrate to form a plurality of liquid chambers for storing liquid and a plurality of discharge ports which communicate with each of the plurality of the liquid chambers to discharge liquid with the thermal energy generated by the energy generating element; and a plurality of heat dissipating members corresponding to each of the plurality of the liquid chambers and having a first portion exposed to the liquid chamber and a second portion exposed to the atmosphere. | 03-29-2012 |
20120120157 | INKJET PRINTHEAD AND METHOD EMPLOYING CENTRAL INK FEED CHANNEL - An inkjet printhead ( | 05-17-2012 |
20120287206 | INKJET PRINTER HAVING PRINTHEAD AND INK FOR MINIMIZING CORROSION OF EXPOSED CORRODIBLE STRUCTURES WITHIN PRINTHEAD - An inkjet printer includes: an inkjet printhead having an exposed corrodible structure containing silicon nitride, borophosphosilicate glass (BPSG) or silicon oxide; and an ink reservoir containing said ink which is in fluid communication with said printhead. The ink includes: water; a dye; and a metal additive for minimizing corrosion of the exposed structure. | 11-15-2012 |
20120287207 | INKJET PRINTER HAVING PRINTHEAD AND INK FOR MINIMIZING CORROSION OF EXPOSED CORRODIBLE STRUCTURES WITHIN PRINTHEAD - An inkjet printer includes: an inkjet printhead having an exposed corrodible structure containing silicon nitride, borophosphosilicate glass (BPSG) or silicon oxide; and an ink reservoir containing said ink which is in fluid communication with said printhead. The ink includes: water; a dye; and a metal additive for minimizing corrosion of the exposed structure. | 11-15-2012 |
20120293587 | THERMAL INK JET PRINTHEAD - A thermal inkjet printhead may include a substrate and a resistive layer. A thermal resistor may be formed in the resistive layer. A first metal layer may be between the substrate and a resistive layer having a thickness to form a power bus. A dielectric layer may be between the first metal layer and the resistive layer. | 11-22-2012 |
20130044163 | FLUID EJECTION DEVICE - A fluid ejection device includes a thin film heater resistor portion having a heater resistor, and a two-layer structure disposed over the heater resistor. The two-layer structure includes a top layer and a bottom layer, with the top layer having a hardness that is at least 1.5 times greater than the hardness of the bottom layer. | 02-21-2013 |
20130050348 | PRINTHEAD SUPPORT STRUCTURE INCLUDING THERMAL INSULATOR - A printing system includes a plurality of inkjet printheads for printing on a print media that is moved relative to the plurality of printheads and a support structure for locating the plurality of printheads relative to the print media. The support structure includes a face adjacent to the print media. The face of the support structure includes a thermal insulator. | 02-28-2013 |
20130063527 | FLUID EJECTION DEVICE HAVING FIRST AND SECOND RESISTORS - A fluid ejection device comprises a first resistor layer that comprises at least a first resistor for heating fluid and a second resistor layer that comprises at least a second resistor for heating fluid. There is an electrically insulating layer between the first and second resistor layers. A print cartridge for a printer comprises a fluid container and a printhead, at least one nozzle, a first resistor layer that comprises at least a first resistor for pre-heating or thermally ejecting fluid, a second resistor layer that comprises at least a second resistor for pre-heating or thermally ejecting fluid, and an electrically insulating layer between the first and second resistor layers. | 03-14-2013 |
20130076837 | PLANAR HEATER STACK AND METHOD FOR MAKING PLANAR HEATER STACK WITH CAVITY WITHIN PLANAR HEATER SUBSTRATA ABOVE SUBSTRATE - A heater stuck includes first strata having a planar configuration supporting and forming a fluid heater element responsive to repetitive electrical activation and deactivation to produce repetitive cycles of fluid ejection from an ejection chamber above the heater element and second strata having a planar configuration coating the heater element of the first strata and being contiguous with the ejection chamber to protect the heater element. The first strata include a substrate and heater strata disposed on it and forming a cavity above the substrate and encompassed on three sides by the heater substrata. The heater substrata includes a pair of conductive layer portions constituting terminal leads disposed on the substrate at opposite sides of the cavity and a resistive layer disposed on the conductive layer portions and defining the fluid heater element that spans the top of the cavity. | 03-28-2013 |
20130201257 | NOZZLE ASSEMBLY WITH ELLIPTICAL NOZZLE OPENING AND PRESSURE-DIFFUSING STRUCTURE - A nozzle assembly for an inkjet printhead includes: an ink chamber having an elliptical nozzle opening defined in a roof of the ink chamber and an ink inlet; a heater element positioned in the ink chamber, the heater element having an elongate linear beam for generating a vapour bubble in the ink chamber, the elongate linear beam having a longitudinal axis extending parallel with a major axis of the elliptical nozzle opening; and a pressure-diffusing structure positioned relative to the ink inlet. The pressure-diffusing structure is configured for diffusing pressure pulses in ink supplied to the ink chamber via the ink inlet. | 08-08-2013 |
20130265369 | PATTERNED HEATER TRACES FOR INKJET PRINTHEAD - A printhead for an ink jet printer can be formed as a plurality of substructures which are connected subsequent to inspection and/or testing. A substructure can include a semiconductor substrate such as a silicon substrate having a plurality of heater traces which are used to maintain a temperature of melted solid ink within a tolerance of a desired temperature. The traces can be accurately formed using semiconductor processing techniques. Testing and/or inspecting the substructures prior to assembly can reduce rework and scrap, and can allow the formation of printhead structures from a wide variety of materials. | 10-10-2013 |
20130321532 | SCREEN PRINTED JET STACK HEATER - Apparatus and methods for heating a printer jet stack. The apparatus includes a first layer and a second layer disposed generally parallel to the first layer. The apparatus also includes a heating layer including a thermal epoxy configured to generate heat when an electrical current is applied thereto. The heating layer is disposed between and bonds together the first layer and the second layer. | 12-05-2013 |
20140300669 | LIQUID DISCHARGE HEAD, CLEANING METHOD FOR LIQUID DISCHARGE HEAD, LIQUID DISCHARGE APPARATUS, AND SUBSTRATE FOR LIQUID DISCHARGE HEAD - A substrate for a liquid discharge head includes an upper protection film that covers at least a region corresponding to each of thermal energy generation elements. The upper protection film and at least one of the upper protection films adjacent to the upper protection film within a liquid chamber are respectively connected to different external electrodes, and a voltage can be applied therebetween via the different external electrodes. | 10-09-2014 |
20150042725 | INKJET PRINT HEAD, METHOD OF MANUFACTURING THE SAME AND DRAWING APPARATUS EQUIPPED WITH THE SAME - Provided are a manufacturing method of an inkjet print head, the inkjet print head and a drawing apparatus equipped with the inkjet print head. The manufacturing method includes: forming a separation assisting layer on a substrate; forming heating resistors, thin-film transistors and nozzles for ejecting liquid, on the separation assisting layer; separating the separation assisting layer from the substrate; forming a first heat-conductive layer on the opposite surface of the separation assisting layer from the nozzles; and forming an ink supply port for supplying ink to the nozzles from a first heat-conductive layer side of the inkjet print head. | 02-12-2015 |
20150070442 | INKJET NOZZLE DEVICE CONFIGURED FOR VENTING GAS BUBBLES - An inkjet nozzle device configured for venting a gas bubble during droplet ejection. The inkjet nozzle device includes: a firing chamber for containing ink, the firing chamber having a floor and a roof defining an elongate nozzle aperture having a perimeter; and an elongate heater element bonded to the floor of the firing chamber, the heater element and nozzle aperture having aligned longitudinal axes. The device is configured to satisfy the relationships A =swept volume/area of heater element=8 to 14 microns; and B=firing chamber volume/swept volume=2 to 6. The swept volume is defined as the volume of a shape defined by a projection from the perimeter of the nozzle aperture to the floor of the firing chamber, and includes a volume contained within the nozzle aperture. | 03-12-2015 |
20150085021 | FLUID EJECTION APPARATUS - A fluid ejection apparatus ( | 03-26-2015 |
20150367636 | ELEMENT SUBSTRATE AND LIQUID DISCHARGE HEAD - An element substrate includes a discharge port that discharges a liquid, an energy-generating element that generates energy that discharges the liquid from the discharge port, an acting chamber that makes the energy of the energy-generating element act on the liquid, and a heating element including at least two heat generating surfaces that are exposed to the liquid inside the acting chamber, the heating element disposed inside the acting chamber. The element substrate further includes a substrate in which a supply port that supplies liquid to the acting chambers is formed. The heating element may be disposed such that the heat generating surfaces are spaced apart from the substrate. | 12-24-2015 |
20150367642 | ELEMENT SUBSTRATE AND LIQUID DISCHARGING HEAD - An element substrate includes a discharge port from which liquid is discharged, an energy generating element configured to generate energy for discharging the liquid from the discharge port, a heating element having a shape with a longitudinal axis and including at least two heating surfaces exposed to the liquid, a first support portion configured to support one end portion of the heating element, a second support portion configured to support the other end portion of the heating element, and a third support portion configured to support a portion between the one end portion and the other end portion. | 12-24-2015 |
20160009089 | MEMS Devices and Methods of Fabrication Thereof | 01-14-2016 |
20160009090 | INKJET PRINTHEAD SUBSTRATE, METHOD OF MANUFACTURING THE SAME, AND INKJET PRINTHEAD | 01-14-2016 |
20220134751 | WAFER STRUCTURE - A wafer structure is disclosed and includes a chip substrate and a plurality of inkjet chips. The chip substrate is a silicon substrate which is fabricated by a semiconductor process on a wafer of at least 12 inches. The plurality of inkjet chips include at least one first inkjet chip and at least one second inkjet chip. The plurality of inkjet chips are directly formed on the chip substrate by the semiconductor process, respectively, and diced into the at least one first inkjet chip and the at least one second inkjet chip, to be implemented for inkjet printing. | 05-05-2022 |