| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 347072000 | Plural piezoelectric laminate | 18 |
| 20080198205 | Printhead Fabricated on Flexible Substrate - A printhead or other droplet emitter is manufactured integrally with a flexible circuit. Preferred methods of manufacturing a droplet emitter comprise the steps of: creating metal traces, preferably deposited using a metal oxide precursor; patterning a sacrificial photoresist to create ink channels and nozzle chambers; depositing piezoelectrically active material over the metal traces and sacrificial photoresist; patterning vias through the piezo-electrically active material to act as nozzles and openings to ink reservoirs; and flushing out the photoresist. The piezo-electrically active material is preferably a mixture of PZT and PVDF. | 08-21-2008 |
| 20080204522 | LIQUID EJECTION HEAD - A liquid ejection head according to one aspect of the invention comprises: a channel unit that comprises: a plurality of individual liquid channels each including a pressure chamber; and a first surface having a plurality of openings corresponding to a plurality of the pressure chambers; and a piezoelectric actuator unit having a second surface that is bonded to the first surface of the channel unit via an adhesive to cover the plurality of pressure chambers. One or more grooves are formed in the first surface of the channel unit to surround the plurality of pressure chambers. An outer edge portion of the second surface the piezoelectric actuator unit faces the groove. A supporting portion that faces the outer edge portion of the second surface of the piezoelectric actuator unit to support the piezoelectric actuator unit is provided in the groove. | 08-28-2008 |
| 20080211883 | LIQUID DISCHARGE APPARATUS AND CHECK METHOD OF THE SAME - A piezoelectric actuator has a first ceramic layer covering openings of pressure chambers, a first electrode provided over the plurality of pressure chambers, a second ceramic layer, a second electrode, a third ceramic layer and a third electrode in this order from the side of the pressure chambers. By measuring insulation resistance between a cavity unit and the first electrode in the state where ink is filled into the pressure chambers, a defect in the ceramic layer is detected. | 09-04-2008 |
| 20080225089 | PIEZOELECTRIC ACTUATOR, LIQUID EJECTION HEAD, IMAGE FORMING APPARATUS, AND METHOD OF MANUFACTURING PIEZOELECTRIC ACTUATOR - The piezoelectric actuator has: a diaphragm made of silicon; an insulating layer formed on a front surface of the diaphragm; a plurality of individual electrodes formed on a surface of the insulating layer; a plurality of piezoelectric bodies formed respectively on surfaces of the plurality of individual electrodes; and a plurality of common electrodes which are respectively arranged across the plurality of piezoelectric bodies from the plurality of individual electrodes, wherein the plurality of piezoelectric bodies are polarized in a direction from the individual electrodes toward the plurality of common electrodes. | 09-18-2008 |
| 20080239025 | Micromachined fluid ejector array - This invention relates to a micromachined fluid ejector array having a fluid reservoir bounded at one side by an elastic membrane having scalable arrays of orifices arranged between concentric piezoelectric transducers, and at another side by a top cover supported by surrounding walls. By actuating neighboring concentric piezoelectric transducers, the scalable array of orifices arranged between the actuated neighboring concentric piezoelectric transducers deflect to eject fluid droplets. Also disclosed is a micromachined fluid ejector array having a fluid reservoir bounded at one side by an elastic membrane having scalable arrays of orifices arranged between concentric piezoelectric transducers, and at another side by a top cover supported by surrounding walls. A piezoelectric layer is bonded on top of the top cover. By actuating the piezoelectric layer bonded on top of the top cover, the scalable arrays of orifices arranged between the neighboring concentric piezoelectric transducers deflect in phase to eject fluid droplets. | 10-02-2008 |
| 20080259134 | PRINT HEAD LAMINATE - A print head laminate includes a flexible glass layer between an adhesive layer and an electrical conductor. | 10-23-2008 |
| 20090002461 | DISCHARGE HEAD AND METHOD FOR PRODUCING DISCHARGE HEAD - A discharge head includes a discharge driving element; an individual electrode formed on the discharge driving element and having a connecting section; and a wired board having a terminal which is joined to the individual electrode by a conductive brazing material. The connecting section is provided to face the terminal, and a metal, which is hardly sulfurized, is exposed in a facing area, of a surface of the connecting section, facing the terminal. A silver sulfide coating is formed on a surface of the connecting section except for a portion facing the terminal. The silver sulfide coating has a low affinity for the conductive brazing material, which is hardly wetted thereby. Therefore, even when the conductive brazing material leaks, then the conductive brazing material is not retained on the silver sulfide coating, and no influence is exerted on the driving operation of the discharge head. | 01-01-2009 |
| 20090002462 | ACTUATOR UNIT AND MANUFACTURING METHOD THEREOF, AND LIQUID EJECTION HEAD - An actuator unit for applying pressure to liquid in each of pressure chambers formed in a passage unit includes a piezoelectric layer; a common electrode formed on one surface of the piezoelectric layer to be positioned over the pressure chambers; and electric field blocking layers formed on an opposite surface of the piezoelectric layer from the one surface to be opposed to the common electrode and outside regions of the respective pressure chambers. Each electric field blocking layer is porous and lower in dielectric constant than the piezoelectric layer. The actuator unit further includes lands each positioned to sandwich an electric field blocking layer between the land and the piezoelectric layer; and individual electrodes formed on the opposite surface to be opposed to the respective pressure chambers and the common electrode and neighbor the respective electric field blocking layers. Each individual electrode is electrically connected to the corresponding land. | 01-01-2009 |
| 20090051740 | Inkjet recording system and recording apparatus - An inkjet recording system including an inkjet recording head in which a part of wall face of a pressure chamber in which a nozzle is provided is formed of a piezoelectric element, the piezoelectric element being activated and deformed to make pressure wave act on ink in the pressure chamber, thereby discharging an ink droplet from the nozzle, wherein surface of the piezoelectric element forming a part of wall face of the pressure chamber has a centerline average roughness Ra ranging from 0.05 to 2 μm, and contact angle θ with ink is 45 degrees or less, and the following expression (1) is satisfied; | 02-26-2009 |
| 20090096843 | INKJET PRINTING DEVICE AND METHOD OF DRIVING THE SAME - An inkjet printing device includes a flow path plate comprising a manifold to supply ink, a pressure chamber filled with the ink supplied from the manifold, and a nozzle via which the ink is ejected, a piezoelectric actuator which is disposed on a top surface of the flow path plate and includes a lower electrode, a piezoelectric layer, and an upper electrode that are stacked sequentially, a first electrostatic electrode to generate an electrostatic field, and a second electrostatic electrode which is disposed a predetermined distance apart from a bottom surface of the flow path plate to generate the electrostatic field between the first electrostatic electrode and the second electrostatic electrode. | 04-16-2009 |
| 20090096844 | Liquid-droplet jetting apparatus and liquid-droplet jetting head - A piezoelectric actuator includes first active portions corresponding to center portions in a row direction of pressure chambers and second active portions corresponding to left and right portions on outer peripheral sides which are more outside than the center portions of the pressure chambers. When applying voltage to the first active portions, the first active portions deform to project toward pressure chambers. At this time, the second active portions do not deform and the influence of deformation of the first active portions does not reach the adjacent pressure chambers. Accordingly, effect of suppressing crosstalk is exhibited. | 04-16-2009 |
| 20090189959 | Ink-jet head and ink-jet printer having ink-jet head - An inkjet head comprises a plurality of individual electrodes each of which includes a first part and a second part connected to an end portion B of the first part. The end portion B is one of the end portions of a first part in a longitudinal direction of a pressure chamber. The second part of each of the individual electrodes corresponding to a first pressure chamber line is positioned between two first parts corresponding to two respective pressure chambers neighboring each other in a second pressure chamber line, so that an end portion C of the second part crosses over a line connecting each end portion D of the two first parts. | 07-30-2009 |
| 20090213190 | METHOD OF MANUFACTURING OF A LIQUID JET HEAD, A METHOD OF MANUFACTURING OF A PIEZOELECTRIC ELEMENT AND A LIQUID JET APPARATUS - In a step of heating a piezoelectric precursor film, piezoelectric films are formed one by one on each of plurality of flow passage forming substrate wafers constituting a flow passage forming substrate wafer group, and an order of the flow passage forming substrate wafers for starting the heating of the piezoelectric precursor film is varied by the predetermined number of wafers of the flow passage forming substrate wafer group. | 08-27-2009 |
| 20100013894 | PIEZOELECTRIC LAMINATE, SURFACE ACOUSTIC WAVE DEVICE, THIN-FILM PIEZOELECTRIC RESONATOR, AND PIEZOELECTRIC ACTUATOR - A piezoelectric laminate including a base and a first piezoelectric layer formed above the base and including potassium sodium niobate. The first piezoelectric layer is shown by a compositional formula (K | 01-21-2010 |
| 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 |
| 20120200643 | PIEZOELECTRIC DEVICE, LIQUID-EJECTING HEAD, AND LIQUID-EJECTING APPARATUS - A piezoelectric device comprises a first electrode, a piezoelectric layer provided above the first electrode, and a second electrode provided above the piezoelectric layer. The piezoelectric layer comprises a mixed crystal containing at least bismuth ferrate and barium titanate. The piezoelectric layer comprises a first piezoelectric layer and a second piezoelectric layer which is disposed between at least one of the first and second electrodes and the first piezoelectric layer. The barium titanate content of the second piezoelectric layer is at least 10 mole percent higher than the barium titanate content of the first piezoelectric layer. | 08-09-2012 |
| 20130229465 | PIEZOELECTRIC DEVICE, METHOD OF MANUFACTURING PIEZOELECTRIC DEVICE, AND LIQUID EJECTION HEAD - A piezoelectric device includes: a substrate; a first electrode which is layered over the substrate; a first piezoelectric film which is layered over the first electrode; a metal oxide film which is layered over the first piezoelectric film; a metal film which is layered over the metal oxide film; a second piezoelectric film which is layered over the metal film; and a second electrode which is layered over the second piezoelectric film, wherein a polarizing direction of the first piezoelectric film and a polarizing direction of the second piezoelectric film are different from each other. | 09-05-2013 |
| 20150062257 | SODIUM NIOBATE POWDER, METHOD FOR PRODUCING THE SAME, METHOD FOR PRODUCING CERAMIC, AND PIEZOELECTRIC ELEMENT - A sodium niobate powder includes sodium niobate particles having a shape of a cuboid and having a side average length of 0.1 μm or more and 100 μm or less, wherein at least one face of each of the sodium niobate particles is a (100) plane in the pseudocubic notation and a moisture content of the sodium niobate powder is 0.15 mass % or less. A method for producing a ceramic using the sodium niobate powder is provided. A method for producing a sodium niobate powder includes a step of holding an aqueous alkali dispersion liquid containing a niobium component and a sodium component at a pressure exceeding 0.1 MPa, a step of isolating a solid matter from the aqueous dispersion liquid after the holding, and a step of heat treating the solid matter at 500° C. to 700° C. | 03-05-2015 |
