Patent application number | Description | Published |
20090040264 | SUBSTRATE FOR INK JET PRINTING HEAD, INK JET PRINTING HEAD, INK JET PRINTING APPARATUS, AND METHOD OF BLOWING FUSE ELEMENT OF INK JET PRINTING HEAD - A fuse element can be reliably blown and data that corresponds to whether or not the fuse element has been blown can be stored with high reliability. A resistor element is provided in a circuit through which an electric current flows to blow the fuse element in the ink jet printing head. The resistor element adjusts the electric current so that, in the process of blowing the fuse element, the current continues to flow for a predetermined duration even after a maximum current has passed through the fuse element. The predetermined duration is longer than a period from a time point when the electric current rises to a time point when the electric current reaches the maximum current. | 02-12-2009 |
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 |
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 |
20100079551 | SUBSTRATE FOR LIQUID DISCHARGE HEAD, METHOD OF MANUFACTURING THE SAME, AND LIQUID DISCHARGE HEAD USING SUCH SUBSTRATE - The invention provides a substrate for a liquid discharge head having a heat generating resistor layer, wiring electrically in contact with the heat generating resistor layer, an insulating protection layer that covers the heat generating resistor layer and the wiring, and a liquid passage that are formed in order on an insulating layer formed on a base plate. The insulating protection layer being a layer formed by radical shower CVD. | 04-01-2010 |
20100220154 | BASE FOR LIQUID DISCHARGE HEAD, AND LIQUID DISCHARGE HEAD USING THE SAME - A base for a liquid discharge head includes a heat element which forms an exothermic portion | 09-02-2010 |
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 |
20100285617 | LIQUID DISCHARGE HEAD SUBSTRATE, LIQUID DISCHARGE HEAD USING THE SUBSTRATE, AND MANUFACTURING METHOD THEREFOR - Provided is a liquid discharge head substrate including: a substrate; a heating resistor layer formed on the substrate; a flow path for a liquid; a wiring layer stacked on the heating resistor layer and having an end portion which forms a step portion on the heating resistor layer; and a protective layer covering the heating resistor layer and the wiring layer including the step portion, and formed between the heating resistor layer and the flow path, in which the protective layer is formed by a Cat-CVD method. | 11-11-2010 |
20110056079 | INK JET RECORDING HEAD AND MANUFACTURING METHOD OF INK JET RECORDING HEAD - An ink jet recording head includes a substrate provided with an energy generating element to generate energy used for discharging ink, a discharge port through which the ink is discharged, a supply port for supplying the ink, and an ink path formed on the substrate for making the discharge port and the supply port communicate with each other, wherein wall members forming the ink path are made of an inorganic material, and a space between adjacent ink paths is filled up by a metal layer. | 03-10-2011 |
20110192498 | MANUFACTURING METHOD FOR LIQUID-DISCHARGE HEAD SUBSTRATE - A manufacturing method for a liquid-discharge head substrate including a base material provided with an energy generating element that generates energy utilized for discharging liquid, a noble metal layer including noble metal provided on a surface of the base material on energy generating element side, and a material layer provided to come into contact with the noble metal layer. The manufacturing method includes preparing the base material on which the material layer is provided, oxidizing a part of a surface of the material layer by discharging electricity in oxygen-containing gas, and providing the noble metal layer on the base material. | 08-11-2011 |
20110199421 | CIRCUIT BOARD FOR INK JET HEAD, INK JET HEAD HAVING THE SAME, METHOD FOR CLEANING THE HEAD AND INK JET PRINTING APPARATUS USING THE HEAD - In an ink jet head using a thermal energy for ejecting ink, this invention aims to reliably and uniformly remove kogations deposited on a heat application portion in contact with the ink. To realize this objective, the upper protective layer is arranged in an area including the heat application portion so that it can be electrically connected to serve as an electrode which causes an electrochemical reaction with the ink. The upper protective layer is formed of a material containing a metal which is dissolved by the electrochemical reaction and which does not form, on heating, an oxide film which hinders the dissolution. With this arrangement, a reliable electrochemical reaction can be produced to dissolve a surface layer of the upper protective layer, thereby removing kogations on the heat application portion reliably and uniformly. | 08-18-2011 |
20110239462 | METHOD OF MANUFACTURING LIQUID DISCHARGING HEAD - A method of manufacturing a liquid discharging head which includes a flow path forming member which has a discharge port for discharging a liquid and a liquid flow path communicating with the discharge port, and a base body having a liquid supply port which supplies the liquid flow path with the liquid, the method includes (1) forming a mold of the liquid flow path and a foundation member formed of a porous inorganic material over the base body, (2) applying an organic resin over the base body so as to cover the mold and the foundation member to form the flow path forming member, (3) forming the discharge port in the flow path forming member to form the liquid supply port in the base body, and (4) removing the mold to form the liquid flow path. | 10-06-2011 |
20120105537 | CIRCUIT BOARD FOR INK JET HEAD, INK JET HEAD HAVING THE SAME, METHOD FOR CLEANING THE HEAD AND INK JET PRINTING APPARATUS USING THE HEAD - In an ink jet head using a thermal energy for ejecting ink, this invention aims to reliably and uniformly remove kogations deposited on a heat application portion in contact with the ink. To realize this objective, the upper protective layer is arranged in an area including the heat application portion so that it can be electrically connected to serve as an electrode which causes an electrochemical reaction with the ink. The upper protective layer is formed of a material containing a metal which is dissolved by the electrochemical reaction and which does not form, on heating, an oxide film which hinders the dissolution. With this arrangement, a reliable electrochemical reaction can be produced to dissolve a surface layer of the upper protective layer, thereby removing kogations on the heat application portion reliably and uniformly. | 05-03-2012 |
20120164337 | 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 | 06-28-2012 |
20130141494 | LIQUID DISCHARGE HEAD AND LIQUID DISCHARGE DEVICE - A liquid discharge head, contains: an energy generating element which generates thermal energy and contains a heat generation resistant layer and a pair of electrode layers whose end surfaces are separated from each other; an insulating layer covering the pair of electrode layers and the heat generation resistant layer and containing an insulating material; a protective layer provided above the insulating layer at least at a position corresponding to the energy generating element and containing a metal material containing iridium or ruthenium; and a covering layer provided at a position covering at least portions of the protective layer corresponding to the end surfaces of the pair of electrode layers in such a manner that a part of the protective layer is exposed and containing a metal material containing tantalum or niobium. | 06-06-2013 |
20130257995 | METHOD FOR DRIVING LIQUID DISCHARGE HEAD, LIQUID DISCHARGE HEAD, AND LIQUID DISCHARGE APPARATUS - A liquid discharge apparatus includes: a liquid discharge head which includes; a discharge port to discharge a liquid; and a substrate including: an energy generating element for generating thermal energy to discharge the liquid from the liquid discharge port; a pair of electrodes connected to the energy generating element for driving thereof; an insulating layer of an insulating material provided to cover the energy generating element; and a metal layer of a metal material provided corresponding to the energy generating element to cover the insulating layer; and a driver unit which sets a first potential of one of the pair of electrodes substantially equal to the potential of the liquid and a second potential of the other one of the pair of electrodes lower than the first potential to drive the energy generating element. | 10-03-2013 |
20140218439 | LIQUID DISCHARGE DEVICE AND CLEANING METHOD FOR LIQUID DISCHARGE HEAD - A liquid discharge device includes a liquid discharge head including a discharge port surface on which discharge ports for discharging liquid are formed, an electrothermal conversion element configured to generate energy for discharging liquid from the discharge ports, and a protection film configured to cover at least the electrothermal conversion element, and a cap configured to cover the discharge port surface, wherein the cap is arranged along the discharge port surface at a position opposite to the protection film via the discharge ports in a state where the cap covers the discharge port surface, and wherein the cap includes an electrode configured to be used to apply voltage between the protection film and the electrode. | 08-07-2014 |
20140240402 | LIQUID DISCHARGE HEAD SUBSTRATE, LIQUID DISCHARGE HEAD, AND METHOD OF MANUFACTURING LIQUID DISCHARGE HEAD SUBSTRATE - A liquid discharge head substrate includes a base; a pair of wiring lines; a heat-generating resistive layer, which is in contact with the wiring lines, and which has a portion corresponding to a space between the wiring lines, the portion forming an electrothermal transducer; an insulating layer which covers the heat-generating resistive layer and the wiring lines and which contains Si; a protective layer which covers at least one region of the insulating layer which contains Ir; and an intermediate layer which is placed between the insulating layer and the protective layer. The intermediate layer contains a material represented by the formula Ta | 08-28-2014 |
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 |
20140318976 | REPRODUCTION METHOD OF LIQUID EJECTING HEAD - A reproduction method of a liquid ejecting head including: a process of filling the flow path with an electrolyte solution containing metal, and filling a space between an electrode capable of applying a voltage to between itself and the upper protective film and the upper protective film with the electrolyte solution; and a process of applying a voltage to between the upper protective film and the electrode to make the metal contained in the electrolyte solution deposit on the surface of the upper protective film. | 10-30-2014 |
20140368581 | LIQUID EJECTION HEAD SUBSTRATE AND LIQUID EJECTION HEAD - A liquid ejection head substrate includes a substrate, an element disposed on the substrate that generates thermal energy used for ejecting liquid, and a protective layer disposed at least at a position corresponding to the element. The protective layer contains iridium and has a density in the range of 21.0 g/cm | 12-18-2014 |
20150029267 | LIQUID EJECTING HEAD, SUBSTRATE FOR LIQUID EJECTING HEAD, AND PRINTING APPARATUS - A print head includes upper protective members located at positions corresponding to heat generating resistor elements to protect the heat generating resistor elements, and further, a part of the protective member being eluted to ink when a current flows inside in a state in which the ink is reserved in the pressure chambers. The print head includes a drive element and a logic circuit capable of allowing a current to independently flow in each of the upper protective layers so as to elute a part of the upper protective layer, in which the current flows, to the ink. | 01-29-2015 |