Patent application number | Description | Published |
20100007705 | LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS AND PIEZOELECTRIC ELEMENT - A liquid ejecting head including a pressure generating chamber that communicates with a nozzle opening that ejects liquid and a piezoelectric element that generates a pressure change in the pressure generating chamber. The piezoelectric element includes a first electrode, a piezoelectric body layer that is formed on the first electrode which includes a grain-shaped region, and a second electrode that is formed on a side of the piezoelectric body layer that is opposite to the first electrode. | 01-14-2010 |
20100007706 | LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS, AND PIEZOELECTRIC ELEMENT - A liquid ejecting head includes a pressure generating chamber communicating with a nozzle opening, and a piezoelectric element generating a pressure change in the pressure generating chamber. In this liquid ejecting head, the piezoelectric element includes a first electrode, a piezoelectric layer provided above the first electrode, and a second electrode provided above the piezoelectric layer at a side opposite to the first electrode. The first electrode has a diffusion-preventing layer containing iridium oxide as a primary component, and the diffusion-preventing layer has stress relieving holes that pass through in the thickness direction thereof and that is filled with a material other than iridium oxide. | 01-14-2010 |
20100007707 | LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS, AND PIEZOELECTRIC ACTUATOR - A liquid ejecting head includes a pressure generating chamber that is communicated with a nozzle opening and a piezoelectric element includes a first electrode formed above the pressure generating chamber, a piezoelectric layer formed above the first electrode, and a second electrode formed above the piezoelectric layer. In addition, an amorphous layer including an amorphous material is formed on a surface of the piezoelectric layer at the second electrode side. | 01-14-2010 |
20100020135 | LIQUID-EJECTING HEAD, LIQUID-EJECTING APPARATUS, AND PIEZOELECTRIC TRANSDUCER - A liquid-ejecting head includes a pressure-generating chamber communicatively connected to a nozzle opening and also includes a piezoelectric transducer including a first electrode, a piezoelectric layer disposed on the first electrode, and a second electrode disposed on the piezoelectric layer. The first electrode contains platinum and titanium oxide with a rutile content of 76.5 to 100 mole percent. | 01-28-2010 |
20100073435 | LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS AND ACTUATOR DEVICE - A liquid ejecting head including a fluid channel forming substrate including a pressure generating chamber communicating with a nozzle opening that ejects a liquid droplet and a piezoelectric element. The piezoelectric element has a first electrode, a piezoelectric material layer that is provided on the first electrode and has a perovskite monoclinic structure, and a second electrode formed on the piezoelectric material layer opposite to the first electrode. An angle formed between a direction of an electric field generated between the first and second electrodes and an orientation of a polarization moment of the piezoelectric material layer is greater than an angle formed between the direction of the electric field at a time when the piezoelectric constant of the piezoelectric material layer reaches a maximum level and the orientation of the polarization moment. | 03-25-2010 |
20100085403 | LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS, AND ACTUATOR DEVICE - A liquid ejecting head including a pressure-generating chamber which communicates with a nozzle opening, and a piezoelectric element including a first electrode, a piezoelectric layer formed above the first electrode and having a perovskite structure represented by the general formula ABO | 04-08-2010 |
20100091075 | LIQUID-EJECTING HEAD, LIQUID-EJECTING APPARATUS AND ACTUATOR DEVICE - A liquid-ejecting head including a pressure-generating chamber communicating with an nozzle, and a piezoelectric element having a first electrode, a piezoelectric layer arranged above the first electrode, and a second electrode arranged above the piezoelectric layer. An internal electric field in the piezoelectric layer is biased toward the first electrode or the second electrode and no voltage is applied to the first electrode or the second electrode. | 04-15-2010 |
20100149285 | LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS, AND PIEZOELECTRIC ACTUATOR - A liquid ejecting head includes a pressure generating chamber that communicates with a nozzle opening and a piezoelectric element that includes: a first electrode; a piezoelectric body layer that is formed on the first electrode and which has a perovskite structure with a general formula of ABO | 06-17-2010 |
20100225711 | LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS, AND PIEZOELECTRIC ELEMENT - A liquid ejecting head is provided which includes a pressure generating room communicating with a nozzle opening, and a piezoelectric element generating a pressure change in the pressure generating room. In the above liquid ejecting head, the piezoelectric element includes a first electrode, a piezoelectric layer provided on the first electrode and having a thickness of 5 μm or less, and a second electrode provided on the piezoelectric layer at a side opposite to that of the first electrode, the piezoelectric layer contains lead, zirconium, and titanium, and a Schottky barrier value at the interface between the first electrode and the piezoelectric layer is in the range of 0.76 to 1.29 eV. | 09-09-2010 |
20110063376 | PIEZOELECTRIC ELEMENT, LIQUID EJECTING HEAD, AND LIQUID EJECTING APPARATUS - A piezoelectric element includes a first conductive layer, a second conductive layer disposed to face the first conductive layer, and a piezoelectric layer disposed between the first conductive layer and the second conductive layer and composed of a compound oxide containing at least lead, zirconium, titanium, and oxygen. The piezoelectric layer includes a lead concentration gradient region in which the lead concentration increases from the first conductive layer side to the second conductive layer side. The lead concentration gradient region is disposed on the first conductive layer side of the piezoelectric layer. | 03-17-2011 |
20110063377 | PIEZOELECTRIC ELEMENT, PIEZOELECTRIC ACTUATOR, LIQUID EJECTING HEAD, AND LIQUID EJECTING APPARATUS - A piezoelectric element includes a first conductive layer, a second conductive layer facing the first conductive layer, and a piezoelectric layer between the first and second conductive layers, composed of a compound oxide containing at least lead, zirconium, titanium, and oxygen. The piezoelectric layer includes a first crystal layer on the first conductive layer side of the piezoelectric layer and a second crystal layer continued from the first crystal layer, nearer to the second conductive layer side than the first crystal layer. In the piezoelectric layer, the lead concentration in the first conductive layer side of the first crystal layer is lower than that in the second conductive layer side of the second crystal layer. In the piezoelectric layer, the oxygen concentration in the first conductive layer side of the first crystal layer is higher than that in the second conductive layer side of the second crystal layer. | 03-17-2011 |
20110069124 | LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS, AND PIEZOELECTRIC ELEMENT - A liquid ejecting head having pressure chambers each communicating with a nozzle opening for liquid ejection and piezoelectric element having a first electrode, a piezoelectric layer consisting a perovskite oxide containing lead, zirconium, and titanium, and a second electrode. The piezoelectric layer has a carbon intensity ratio in the range of 8 to 28 in its inner region excluding the volume 20 nm in depth from the second electrodes. The carbon intensity ratio is defined as the ratio of the maximum carbon intensity to the minimum as measured by secondary ion mass spectrometry along the thickness of the piezoelectric layer. | 03-24-2011 |
20110148990 | LIQUID EJECTING HEAD AND LIQUID EJECTING APPARATUS - A liquid ejecting head includes a flow channel forming substrate having pressure generation chambers communicating with a nozzle opening and arranged in parallel along a lateral direction. A piezoelectric element is provided on one surface of the flow channel forming substrate in correspondence to the pressure generation chamber, and has a first electrode, a piezoelectric layer provided on the first electrode and a second electrode provided on the piezoelectric layer. In a direction intersecting with the arrangement direction of the pressure generation chambers, in boundaries between an active section that is a substantial driving section and an inactive section that is not a substantial driving section of the piezoelectric layer, the first electrode includes a taper section of which a width is gradually decreased toward the boundary from the active section side. | 06-23-2011 |
20110148991 | LIQUID EJECTING HEAD AND LIQUID EJECTING APPARATUS - A liquid ejecting head includes a flow channel forming substrate having a pressure generation chamber communicating with a nozzle opening and arranged in parallel along a lateral direction. A piezoelectric element is provided on one surface of the flow channel forming substrate in correspondence to the pressure generation chamber, and has a first electrode, a piezoelectric layer provided on the first electrode and a second electrode provided on the piezoelectric layer. In a direction intersecting with the arrangement direction of the pressure generation chamber, in boundaries between an active section that is a substantial driving section and an inactive section that is not a substantial driving section of the piezoelectric layer of the first electrode, an opening group is provided including at least one opening in the active section and the inactive section. | 06-23-2011 |
20110164093 | LIQUID EJECTING HEAD AND LIQUID EJECTING APPARATUS - A piezoelectric element comprising a first electrode, a piezoelectric layer which contains lead, zirconium, and titanium, and which is formed above the first electrode, and a second electrode formed above the piezoelectric layer. A groove which exists between grains in the second electrode side surface of the piezoelectric layer, satisfies 0≦d/ρ≦0.900 (where d: depth of groove, w: width of groove, ρ: radius of curvature (d | 07-07-2011 |
20110169896 | LIQUID EJECTION HEAD AND LIQUID EJECTION APPARATUS - A liquid ejection head comprising a flow-channel-containing substrate having pressure generating chambers communicating a nozzle opening and a piezoelectric element including a first electrode, a piezoelectric layer formed above the first electrode, and a second electrode formed above the piezoelectric layer. The piezoelectric layer includes an active portion which is substantially driven, a non-active portion which is not substantially driven, and a low dielectric material layer which has a dielectric constant lower than that of a center portion of the active portion and which is in the active portion side of the boundary between the active portion and the non-active portion. | 07-14-2011 |
20110169898 | LIQUID EJECTING HEAD AND LIQUID EJECTING APPARATUS - A piezoelectric element comprising a first electrode, a piezoelectric layer which is composed of a metal oxide containing lead, zirconium and titanium and which formed above the first electrode, and a second electrode formed above the piezoelectric layer. The piezoelectric layer has negatively charged Pb—O complex defects and positively charged Pb—O complex defects, the concentration of the negatively charged Pb—O complex defects being higher than the concentration of the positively charged Pb—O complex defects. | 07-14-2011 |
20110261120 | LIQUID-EJECTING HEAD, LIQUID-EJECTING APPARATUS, AND PIEZOELECTRIC DEVICE - There is provided a piezoelectric device comprising a first electrode, a piezoelectric layer that is formed above the first electrode, a second electrode that is formed above the piezoelectric layer and a coating layer that is formed above the second electrode consisting of tungsten or titanium. | 10-27-2011 |
20120005871 | METHOD FOR MANUFACTURING PIEZOELECTRIC ELEMENT AND METHOD FOR MANUFACTURING LIQUID EJECTION HEAD - A method for manufacturing a piezoelectric element includes a process for forming a first conductive layer, a process for forming a piezoelectric layer having a region serving as an active region, a process for forming a second conductive layer, which overlaps with the region, a process for forming a third conductive layer, which overlaps with the region, on the second conductive layer, a process for forming an opening portion that divides the third conductive layer into a first portion and a second portion, a process for forming a resist layer that covers the opening portion and a peripheral portion at the side of the opening portion of the first portion and the second portion; a process for etching the third conductive layer to form a first conductive portion and a second conductive portion, and a process for etching the second conductive layer to form a third conductive portion. | 01-12-2012 |
20120007928 | LIQUID EJECTING HEAD AND LIQUID EJECTING APPARATUS - A liquid ejecting head comprising: a pressure generating chamber substrate having pressure generating chambers; and a piezoelectric element including first conductive layer, piezoelectric layer, and a second conductive layer provided above the pressure generating chamber substrate, wherein the piezoelectric element includes overlapped areas where the pressure generating chamber and the piezoelectric element overlap one another in plan view, the first conductive layer has a longitudinal direction in a first direction and a second direction orthogonal to the first direction and are provided for each of the overlapped areas, the second conductive layer is provided continuously so as to overlap with a plurality of the pressure generating chambers and includes end areas on the side of the ends of the overlapped areas in the first direction, and the end areas are each reduced in width in the second direction as it goes toward the end in the first direction. | 01-12-2012 |
20120007929 | LIQUID EJECTING HEAD AND LIQUID EJECTING APPARATUS - A liquid ejecting head comprising: a pressure chamber substrate where pressure chambers that communicates with nozzle holes are provided, and a piezoelectric element including a first conductive layer, a piezoelectric material layer, and a second conductive layer, wherein the piezoelectric element has an overlap area that overlaps the pressure chamber, the first conductive layer, the piezoelectric material layer, and the second conductive layer, wherein the second conductive layers overlap a plurality of the pressure chambers continuously, wherein, the first conductive layer is provided in each of the overlap areas and has an end portion area at one end side of the overlap area in the longitudinal direction, and wherein a width of the end portion area gets narrow in the lateral direction as the end portion area directs to the end of the longitudinal direction. | 01-12-2012 |
20120030915 | MANUFACTURING METHOD OF A PIEZOELECTRIC ELEMENT AND A LIQUID EJECTING HEAD - A manufacturing method of a piezoelectric element includes: forming a first conductive layer upon a substrate; forming a piezoelectric layer upon the first conductive layer; forming a second conductive layer upon the piezoelectric layer; forming a third conductive layer upon the second conductive layer; forming a first portion, a second portion, and an opening portion provided between the first portion and the second portion by patterning the third conductive layer; forming a resist layer that covers the opening portion and covers the edges of the first portion and the second portion that face the opening portion side; and forming a first conductive portion and a second conductive portion configured from the first portion and the second portion, and forming a third conductive portion configured from the second conductive layer, by dry-etching the second conductive layer using the first portion, the second portion, and the resist layer as a mask. | 02-09-2012 |
20120062073 | LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS, AND ACTUATOR DEVICE - A liquid ejecting head including a pressure-generating chamber which communicates with a nozzle opening, and a piezoelectric element including a first electrode, a piezoelectric layer formed above the first electrode and having a perovskite structure represented by the general formula ABO | 03-15-2012 |
20120069103 | LIQUID-EJECTING HEAD, LIQUID-EJECTING APPARATUS, AND PIEZOELECTRIC TRANSDUCER - A liquid-ejecting head includes a pressure-generating chamber communicatively connected to a nozzle opening and also includes a piezoelectric transducer including a first electrode, a piezoelectric layer disposed on the first electrode, and a second electrode disposed on the piezoelectric layer. The first electrode contains platinum and titanium oxide with a rutile content of 76.5 to 100 mole percent. | 03-22-2012 |
20120182360 | LIQUID EJECTING HEAD AND LIQUID EJECTING APPARATUS - A liquid ejecting head comprises a pressure generation chamber communicating with a nozzle opening, a vibrating wall provided as one surface of the pressure generation chamber and vibrates so that ejects the liquid from the nozzle opening, and a resin portion having a recessed arc-shape and formed in a corner of the pressure generation chamber and formed of a resin material having a Young's modulus of less than or equal to 10 GPa. A ratio r/w of a radius r of the surface of the resin portion to a width w of the pressure generation chamber defined by the vibrating wall is greater than or equal to 0.017 and less than or equal to 0.087. | 07-19-2012 |
20130147321 | LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS, AND ACTUATOR DEVICE - A liquid ejecting head including a pressure-generating chamber which communicates with a nozzle opening, and a piezoelectric element including a first electrode, a piezoelectric layer formed above the first electrode and having a perovskite structure represented by the general formula ABO | 06-13-2013 |
20140002550 | LIQUID EJECTING HEAD AND LIQUID EJECTING APPARATUS | 01-02-2014 |
20140104345 | LIQUID-EJECTING HEAD, LIQUID-EJECTING APPARATUS, AND PIEZOELECTRIC DEVICE - There is provided a piezoelectric device comprising a first electrode, a piezoelectric layer that is formed above the first electrode, a second electrode that is formed above the piezoelectric layer and a coating layer that is formed above the second electrode consisting of tungsten or titanium. | 04-17-2014 |
20140240403 | LIQUID EJECTING HEAD AND LIQUID EJECTING APPARATUS - A liquid ejecting head includes a flow channel forming substrate having pressure generation chambers communicating with a nozzle opening and arranged in parallel along a lateral direction. A piezoelectric element is provided on one surface of the flow channel forming substrate in correspondence to the pressure generation chamber, and has a first electrode, a piezoelectric layer provided on the first electrode and a second electrode provided on the piezoelectric layer. In a direction intersecting with the arrangement direction of the pressure generation chambers, in boundaries between an active section that is a substantial driving section and an inactive section that is not a substantial driving section of the piezoelectric layer, the first electrode includes a taper section of which a width is gradually decreased toward the boundary from the active section side. | 08-28-2014 |
20150077476 | LIQUID-EJECTING HEAD, LIQUID-EJECTING APPARATUS, AND PIEZOELECTRIC DEVICE - There is provided a piezoelectric device comprising a first electrode, a piezoelectric layer that is formed above the first electrode, a second electrode that is formed above the piezoelectric layer and a coating layer that is formed above the second electrode consisting of tungsten or titanium. | 03-19-2015 |