| Patent application number | Description | Published |
|---|
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
