Patent application number | Description | Published |
20090133238 | Multi-Layer Piezoelectric Element and Method for Manufacturing the Same - A multi-layer piezoelectric element having high durability wherein the internal electrodes and the external electrodes do not break even when operated continuously over a long time under high electric field and high pressure is provided. | 05-28-2009 |
20100259132 | Multi-Layer Piezoelectric Element - A multi-layer piezoelectric element of high durability wherein the internal electrodes and the external electrodes do not break even when operated continuously over a long period of time under high electric field and high pressure is provided. The first multi-layer piezoelectric element according to the present invention comprises a stack formed by stacking piezoelectric layers and internal electrodes alternately one on another and external electrodes formed on a first side face and on a second side face of the stack, wherein one of the adjacent internal electrodes is connected to the external electrode formed on the first side face and the other internal electrode is connected to the external electrode formed on the second side face, and the external electrodes include an electrically conductive material and glass and is formed from a porous electrically conductive material that has a three-dimensional mesh structure. | 10-14-2010 |
20100282874 | Multi-Layer Piezoelectric Element and Injection Apparatus Using the Same - A multi-layer piezoelectric element of high durability wherein external electrodes do not peel off the surface of a stack even when operated continuously over a long period of time under a high electric field and a high pressure, a method for manufacturing the same and an injection apparatus using the same are provided. The multi-layer piezoelectric element comprises a stack | 11-11-2010 |
20100326405 | Multi-Layer Piezoelectric Element, and Injection Apparatus and Fuel Injection System that Employ the Same - To provide a multi-layer piezoelectric element that is improved to mitigate the decrease in the amount of displacement under such harsh operating conditions, the multi-layer piezoelectric element, the multi-layer piezoelectric element comprising: a stacked body comprising a plurality of piezoelectric material layers and a plurality of internal electrodes, the stacked body being formed by stacking the plurality of internal electrodes and the piezoelectric layers alternately on each other; and an external electrode formed on a side face of the stacked body, wherein the external electrode comprises a base portion and a first protrusion protruding from the base portion toward an outside. | 12-30-2010 |
20110155104 | Multi-Layer Piezoelectric Element, And Injection Device And Fuel Injection System Using The Same - Provided is a highly durable multi-layer piezoelectric element wherein an external electrode has less possibilities of being peeled off from a side face of a stacked body even when the element is continuously driven for a long period of time in a high electrical field under high pressure. In a multi-layer piezoelectric element ( | 06-30-2011 |
20110168806 | Multi-Layer Piezoelectric Element, and Injection Device and Fuel Injection System Using the Same - Provided is a multi-layer piezoelectric element having excellent durability wherein a conductive member is not peeled off from an external electrode even when the element is continuously driven for a prolonged period of time under high electric field and high pressure. A multi-layer piezoelectric element includes a stacked body wherein piezoelectric layers and internal electrode layers are alternately laminated, and an external electrode which is joined to a side face of the stacked body and electrically connected to the internal electrode layers, and the external electrode includes a plurality of open voids in a surface thereof. Due to the open voids, a joining strength of a conductive member to the external electrode is improved, thereby preventing peel-off of the conductive member. In addition, since heat dissipation characteristics are improved, it is possible to prevent the external electrode from being thermally fractured due to generation of heat. | 07-14-2011 |
20110169373 | Multi-Layer Piezoelectric Element - A multi-layer piezoelectric element of high durability wherein the internal electrodes and the external electrodes do not break even when operated continuously over a long period of time under high electric field and high pressure is provided. The first multi-layer piezoelectric element according to the present invention comprises a stack formed by stacking piezoelectric layers and internal electrodes alternately one on another and external electrodes formed on a first side face and on a second side face of the stack, wherein one of the adjacent internal electrodes is connected to the external electrode formed on the first side face and the other internal electrode is connected to the external electrode formed on the second side face, and the external electrodes include an electrically conductive material and glass and is formed from a porous electrically conductive material that has a three-dimensional mesh structure. | 07-14-2011 |
20120024980 | Multi-Layer Piezoelectric Element, and Injection Device and Fuel Injection System Comprising the Same - Provided is a highly durable multi-layer piezoelectric element wherein a conductive connection member is not broken even in the case of continuous driving for a long period in a high electric field under high pressure. | 02-02-2012 |
20120132729 | Multi-Layer Piezoelectric Element, and Injection Device and Fuel Injection System Incorporating the Multi-Layer Piezoelectric Element - A multi-layer piezoelectric element includes a stacked body configured so that piezoelectric layers and internal electrode layers are alternately laminated, and an external electrode composed of a sintered material of both electrically conductive particles and a glass, the external electrode which is bonded to a side surface of the stacked body and makes electrical connection with the internal electrode layers. The external electrode has a stacked body-side layer region containing glass as secondary constituent at its stacked body-facing side, and an exterior-side layer region containing glass as minor constituent at its exterior side. The glass of the exterior-side layer region is distributed along grain boundary of the conductive particles on an outermost surface of the exterior-side layer region. | 05-31-2012 |
20120187211 | MULTI-LAYER PIEZOELECTRIC ELEMENT, AND INJECTION DEVICE AND FUEL INJECTION SYSTEM USING THE SAME - A multi-layer piezoelectric element includes a stacked body in which piezoelectric layers and internal electrode layers are alternately laminated and a stress relaxing layer is disposed at part of portions between the piezoelectric layers, and an external electrode that is bonded to a side face of the stacked body so as to make electrical connection with the internal electrode layers, the internal electrode layers being not exposed on the side face of the stacked body, but the stress relaxing layer being exposed on the side face of the stacked body. | 07-26-2012 |
20130161421 | Multilayer Piezoelectric Element and Injector Using the Same - A multilayer piezoelectric element includes a plurality of piezoelectric layers and a plurality of metal layers stacked alternately. The plurality of metal layers include a plurality of low-filled metal layers having a lower filling rate of metal composing the metal layers than oppositely disposed metal layers adjacent to each other in a stacking direction. The plurality of metal layers may include a plurality of thin metal layers having a smaller thickness than oppositely disposed metal layers adjacent to each other in a stacking direction. Where the plurality of metal layers are composed mainly of an alloy, the plurality of metal layers may include a plurality of high-ratio metal layers having a higher ratio of a component constituting the alloy than oppositely disposed metal layers adjacent to each other in a stacking direction. | 06-27-2013 |
20130168465 | Multilayer Piezoelectric Element and Injector Using the Same - A multilayer piezoelectric element includes a plurality of piezoelectric layers and a plurality of metal layers stacked alternately. The plurality of metal layers include a plurality of low-filled metal layers having a lower filling rate of metal composing the metal layers than oppositely disposed metal layers adjacent to each other in a stacking direction. The plurality of metal layers may include a plurality of thin metal layers having a smaller thickness than oppositely disposed metal layers adjacent to each other in a stacking direction. Where the plurality of metal layers are composed mainly of an alloy, the plurality of metal layers may include a plurality of high-ratio metal layers having a higher ratio of a component constituting the alloy than oppositely disposed metal layers adjacent to each other in a stacking direction. | 07-04-2013 |
20130183187 | Method for Manufacturing Ceramic Member, and Ceramic Member, Gas Sensor Device, Fuel Cell Device, Multi-Layer Piezoelectric Device, Injection Apparatus and Fuel Injection System - A ceramic member in which the metal layers with high void ratio are sufficiently sintered to lower a residue of resin is produced. | 07-18-2013 |
20140026858 | MULTI-LAYER PIEZOELECTRIC ELEMENT, AND PIEZOELECTRIC ACTUATOR, INJECTION DEVICE, AND FUEL INJECTION SYSTEM PROVIDED WITH SAME - There are provided a multi-layer piezoelectric element which is capable of suppression of occurrence of an imperfect area, suffers from no development of leakage current even with moisture intrusion, has long-term freedom from variations in displacement and can achieve stable driving, as well as to provide a piezoelectric actuator, an injection device, and a fuel injection system provided with the multi-layer piezoelectric element. A multi-layer piezoelectric element includes a stacked body in which piezoelectric layers and internal electrodes acting as positive and negative internal electrodes are laminated; an inorganic coating attached to a side surface of the stacked body where ends of both the positive internal electrodes and the negative internal electrodes are exposed; and metal particles composed predominantly of a metal element contained in the internal electrodes, the metal particles dispersed in the inorganic coating. | 01-30-2014 |
20140055932 | PIEZOELECTRIC ACTUATOR, PIEZOELECTRIC VIBHRATION APPARATUS AND PORTABLE TERMINAL - A piezoelectric actuator, a piezoelectric vibration apparatus and a portable terminal are disclosed. The actuator includes a piezoelectric element, a flexible substrate and a bonding layer. The piezoelectric element includes a laminate in which inner electrodes and piezoelectric layers are alternatively stacked; and surface electrodes on a first main surface of the laminate, each electrically connected to some of the inner electrodes, respectively. The flexible substrate includes a wiring conductor that is electrically connected to the surface electrodes. The bonding layer is located between a part of flexible substrate and the first main surface. At least a region, where the flexible substrate is bonded, of the first main surface has a flatness worse than a flatness of an second main surface which is opposed to the first main surface. | 02-27-2014 |
20140367191 | ACOUSTIC GENERATOR, ACOUSTIC GENERATION DEVICE, AND ELECTRONIC DEVICE - An object is to flatten a frequency characteristic. For achieving the object, an acoustic generator according to an embodiment includes a piezoelectric element (exciter) and a film (film-like vibrating body). The piezoelectric element receives input of an electric signal and vibrates. The piezoelectric element is bonded to the film through a bonding material and the film vibrates together with the piezoelectric element with the vibration of the piezoelectric element. Furthermore, the acoustic generator in the embodiment has voids in the bonding material. | 12-18-2014 |
Patent application number | Description | Published |
20080238264 | Multi-Layer Piezoelectric Element and Method for Manufacturing the Same - The multi-layer piezoelectric element comprises a stack having an active portion constituted from at least one piezoelectric layer and a plurality of internal electrodes consisting of first and second internal electrodes placed one on another, the active portion being subjected to expansion and contraction in response to a voltage applied across the first internal electrode and the second internal electrode, and external electrodes formed on two side faces of the stack with one thereof being connected to the first internal electrode and the other connected to the second internal electrode, wherein each of the external electrodes is constituted from three or more layers including a first layer formed in contact with the side face of the stack and a second layer formed on the first layer, to provide a multi-layer piezoelectric element having high durability. | 10-02-2008 |
20090162706 | Method for Manufacturing Ceramic Member, and Ceramic Member, Gas Sensor Device, Fuel Cell Device, Multi-Layer Piezoelectric Device, Injection Apparatus and Fuel Injection System - A ceramic member in which the metal layers with high void ratio are sufficiently sintered to lower a residue of resin is produced. | 06-25-2009 |
20090220765 | Method for Manufacturing Ceramic Member, and Ceramic Member, Gas Sensor Device, Fuel Cell Device, Multi-Layer Piezoelectric Device, Injection Apparatus and Fuel Injection System - A ceramic member in which the metal layers with high void ratio are sufficiently sintered to lower a residue of resin is produced. | 09-03-2009 |
20090295256 | Multilayer Piezoelectric Element and Injector Using the Same - In a multilayer piezoelectric element in which a plurality of piezoelectric layers and a plurality of metal layers are stacked alternately, the plurality of metal layers include a plurality of low-filled metal layers having a lower filling rate of metal composing the metal layers than oppositely disposed metal layers adjacent to each other in a stacking direction. In a multilayer piezoelectric element in which a plurality of piezoelectric layers and a plurality of metal layers are stacked alternately, the plurality of metal layers include a plurality of thin metal layers having a smaller thickness than oppositely disposed metal layers adjacent to each other in a stacking direction. In a multilayer piezoelectric element in which a plurality of piezoelectric layers and a plurality of metal layers composed mainly of an alloy are stacked alternately, the plurality of metal layers include a plurality of high-ratio metal layers having a higher ratio of a component constituting the alloy than oppositely disposed metal layers adjacent to each other in a stacking direction. | 12-03-2009 |
20100013359 | Multi-Layer Piezoelectric Element and Injection Apparatus Using the Same - To provide a multi-layer piezoelectric element having high strength against breakage, high insulation and excellent displacement performance, and an injection apparatus that incorporates the same. | 01-21-2010 |
20100032503 | Multilayer Piezoelectric Element and Injector Using the Same - In a multilayer piezoelectric element comprising a plurality of piezoelectric layers and a plurality of metal layers which are alternately stacked one upon another, the metal layers includes a plurality of high resistance metal layers having a higher electrical resistance than adjacent metal layers on the both sides. The high resistance metal layers are regularly arranged so as to interpose a plurality of different metal layers other than the high resistance metal layers. In another multilayer piezoelectric element in which a plurality of piezoelectric layers and a plurality of metal layers are alternately stacked one upon another, at least one layer of the metal layers is formed by a plurality of partial metal layers disposed between the piezoelectric layers. | 02-11-2010 |