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 |
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 |
20100214370 | METHOD FOR PRODUCING LIQUID EJECTING HEAD, LIQUID EJECTING HEAD, AND LIQUID EJECTING DEVICE - A liquid ejecting head has a piezoelectric element with a first electrode, a piezoelectric layer, and a second electrode. The liquid ejecting head causes pressure changes in a pressure generating chamber communicating with a nozzle opening. The piezoelectric layer has a perovskite structure and is preferentially orientated in a (100) plane. A method for producing the liquid ejecting head includes polarizing the piezoelectric layer by applying an electric field having energy higher than energy required for converting the polarization direction in the <111> direction to the <110> direction and lower than energy required for converting the polarization direction in the <111> direction to the <00 | 08-26-2010 |
20110012963 | LIQUID-EJECTING HEAD, LIQUID-EJECTING APPARATUS, AND PIEZOELECTRIC ELEMENT - A liquid-ejecting head includes a pressure-generating chamber that communicates with a nozzle opening and a piezoelectric element. The piezoelectric element includes a first electrode; a piezoelectric body layer formed on the first electrode; and a second electrode formed on the piezoelectric body layer on a side opposite the first electrode. In the liquid-ejecting head, the piezoelectric body layer has a perovskite structure and an insulating property, and an A-site and an oxygen site of the perovskite structure respectively include a vacancy formed by losing an A-site metal and a vacancy formed by losing an oxygen atom, each of the vacancies including a hydrogen atom. | 01-20-2011 |
20110074890 | DROPLET-EJECTING HEAD, DROPLET-EJECTING APPARATUS, AND PIEZOELECTRIC ELEMENT - A droplet-ejecting head including a substrate including a pressure chamber communicating with a nozzle hole and also a piezoelectric element that includes a lower electrode, a piezoelectric layer which is formed above the lower electrode, and an upper electrode formed above the piezoelectric element and that causes a change in pressure in a liquid contained in the pressure chamber. The piezoelectric layer includes a first piezoelectric sub-layer located on the lower electrode and a second piezoelectric sub-layer located between the first piezoelectric sub-layer and the upper electrode. The first piezoelectric sub-layer has a polarization axis predominantly directed in an in-plane direction of the first piezoelectric sub-layer. The second piezoelectric sub-layer is predominantly (100)-oriented in the pseudocubic coordinate system. | 03-31-2011 |
20110102517 | LIQUID-EJECTING HEAD, LIQUID-EJECTING APPARATUS, PIEZOELECTRIC ELEMENT, AND PIEZOELECTRIC MATERIAL - A liquid-ejecting head includes a pressure-generating chamber communicating with a nozzle opening, and a piezoelectric element. The piezoelectric layer contains a perovskite complex oxide containing Bi, La, Fe, and Mn and is ferroelectric. | 05-05-2011 |
20110102518 | LIQUID-EJECTING HEAD, LIQUID-EJECTING APPARATUS, PIEZOELECTRIC ELEMENT, AND PIEZOELECTRIC MATERIAL - A liquid-ejecting head includes a pressure-generating chamber communicating with a nozzle opening, and a piezoelectric element. The piezoelectric element has piezoelectric layer contains a perovskite complex oxide containing Bi, La, Fe, and Mn and can undergo electric-field-induced phase transition. | 05-05-2011 |
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 |
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 |
20110221831 | LIQUID EJECTION HEAD - A liquid ejection head, comprises a pressure generation chamber communicating with a nozzle opening and a piezoelectric element having a piezoelectric layer and an electrodes. The piezoelectric layer is a perovskite type complex oxide containing bismuth, iron, and cerium. The piezoelectric layer contains the cerium in a proportion of 0.01 mol % or more and 0.13 mol % or lower based on the total amount of the bismuth and the cerium. | 09-15-2011 |
20110273516 | PIEZOELECTRIC ELEMENT, LIQUID-EJECTING HEAD, AND LIQUID-EJECTING APPARATUS - A piezoelectric element includes a piezoelectric layer and electrodes provided to the piezoelectric layer. The piezoelectric layer consists of a complex oxide containing bismuth, cerium, iron and cobalt and the molar ratio of cobalt to the total of iron and cobalt is 0.125 or more and 0.875 or less. | 11-10-2011 |
20110273517 | PIEZOELECTRIC ELEMENT, LIQUID-EJECTING HEAD, AND LIQUID-EJECTING APPARATUS - A piezoelectric element includes electrodes and a piezoelectric layer provided between the electrodes. The piezoelectric layer is made of a complex oxide which contains bismuth, iron, and chromium. The piezoelectric layer contains 0.125 to 0.875 mole of chromium per mole of the combination of iron and chromium. | 11-10-2011 |
20110273519 | LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS, AND PIEZOELECTRIC ELEMENT - A liquid ejecting head includes a pressure-generating chamber in fluid communication with a nozzle opening and a piezoelectric element having a piezoelectric layer and electrodes provided to the piezoelectric layer. The piezoelectric layer is composed of a complex oxide having a perovskite structure containing bismuth and cerium in the A site of the perovskite structure and at least one metallic element selected from the group consisting of iron, cobalt, and chromium in the B site of the perovskite structure, and the molar ratio of the metallic element or elements in the B site, the bismuth, and the cerium is 1:(1−x):(3x/4). | 11-10-2011 |
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 |
20120162320 | PIEZOELECTRIC ELEMENT, LIQUID EJECTING HEAD, AND LIQUID EJECTING APPARATUS - A piezoelectric element comprises a piezoelectric layer and an electrode provided to the piezoelectric layer. The piezoelectric layer is made of complex oxide having a Perovskite-type structure containing bismuth and iron, and the complex oxide includes at least one kind of a first doping element selected from the group consisting of sodium, potassium, calcium, strontium and barium and a second doping element formed from cerium. | 06-28-2012 |
20120162321 | PIEZOELECTRIC ELEMENT, LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS - A piezoelectric element comprises a piezoelectric layer and an electrode provided to the piezoelectric layer. The piezoelectric layer has a Perovskite-type structure containing bismuth and iron, and includes nitrogen in an oxygen site of the Perovskite-type structure. | 06-28-2012 |
20120182357 | PIEZOELECTRIC ELEMENT, LIQUID EJECTING HEAD, AND LIQUID EJECTING APPARATUS - A piezoelectric element comprises a piezoelectric layer consisting of a complex oxide having a perovskite structure containing bismuth and iron and electrodes provided to the piezoelectric layer. The complex oxide further contains a first dopant element that is at least one selected from the group consisting of sodium, potassium, calcium, strontium and barium, and a second dopant element that is cerium. | 07-19-2012 |
20120182358 | PIEZOELECTRIC ELEMENT, LIQUID EJECTING HEAD, AND LIQUID EJECTING APPARATUS - A piezoelectric element comprises a piezoelectric layer and an electrode which is provided with the piezoelectric layer. The piezoelectric layer comprises a complex oxide which has a perovskite structure including bismuth, iron, a first dopant element which is at least one type selected from a group formed from sodium, potassium, calcium, and strontium, and a second dopant element which is at least one type selected from a group formed from manganese, titanium, vanadium, niobium, and tin. | 07-19-2012 |
20120182359 | PIEZOELECTRIC ELEMENT, LIQUID EJECTING HEAD, AND LIQUID EJECTING APPARATUS - A piezoelectric element comprises a piezoelectric layer consisting a complex oxide having a perovskite structure containing bismuth and iron and electrodes provided to the piezoelectric layer. The complex oxide further contains a first dopant element that is magnesium and a second dopant element that is at least one of manganese, titanium, vanadium, niobium and tin. | 07-19-2012 |
20120182361 | PIEZOELECTRIC ELEMENT, LIQUID EJECTING HEAD, AND LIQUID EJECTING APPARATUS - A piezoelectric element comprises a piezoelectric layer consisting a complex oxide having a perovskite structure containing bismuth and iron and electrodes provided to the piezoelectric layer. The complex oxide further contains a first dopant element that is at least one of magnesium and zinc and a second dopant element that is cerium. | 07-19-2012 |
20130127954 | PIEZOELECTRIC ELEMENT, LIQUID-EJECTING HEAD, AND LIQUID-EJECTING APPARATUS - A piezoelectric element includes a piezoelectric layer and electrodes provided to the piezoelectric layer. The piezoelectric layer consists of a complex oxide containing bismuth, cerium, iron and cobalt and the molar ratio of cobalt to the total of iron and cobalt is 0.125 or more and 0.875 or less. | 05-23-2013 |
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 |
20140097724 | LIQUID-EJECTING HEAD, LIQUID-EJECTING APPARATUS, PIEZOELECTRIC ELEMENT, AND PIEZOELECTRIC MATERIAL - A liquid-ejecting head includes a pressure-generating chamber communicating with a nozzle opening, and a piezoelectric element. The piezoelectric layer contains a perovskite complex oxide containing Bi, La, Fe, and Mn and is ferroelectric. | 04-10-2014 |
20140103780 | LIQUID-EJECTING HEAD, LIQUID-EJECTING APPARATUS, PIEZOELECTRIC ELEMENT, AND PIEZOELECTRIC MATERIAL - A liquid-ejecting head includes a pressure-generating chamber communicating with a nozzle opening, and a piezoelectric element. The piezoelectric element has piezoelectric layer contains a perovskite complex oxide containing Bi, La, Fe, and Mn and can undergo electric-field-induced phase transition. | 04-17-2014 |
20140146111 | LIQUID EJECTION HEAD - A liquid ejection head, comprises a pressure generation chamber communicating with a nozzle opening and a piezoelectric element having a piezoelectric layer and an electrodes. The piezoelectric layer is a perovskite type complex oxide containing bismuth, iron, and cerium. The piezoelectric layer contains the cerium in a proportion of 0.01 molar ratio or more and 0.13 molar ratio or lower based on the total amount of the bismuth and the cerium. | 05-29-2014 |
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 |