Patent application number | Description | Published |
20090026887 | PIEZOELECTRIC DEVICE, PIEZOELECTRIC ACTUATOR, AND LIQUID DISCHARGE DEVICE - In a piezoelectric device, a first electrode, a first piezoelectric film, a second piezoelectric film, and a second electrode are formed in this order on a first electrode formed above a surface of the substrate, and an intermediate electrode is arranged between the first and second piezoelectric films. Each of the first and second piezoelectric films has a thickness of 10 micrometers or smaller, and has a first surface facing toward the substrate and a second surface opposite to the first surface. At least one of the first and second surfaces has an arithmetic average surface roughness (Ra) of 0.5 micrometers or smaller. | 01-29-2009 |
20090267998 | PIEZOELECTRIC DEVICE, METHOD OF ACTUATING THE SAME, PIEZOELECTRIC APPARATUS, AND LIQUID DISCHARGE APPARATUS - A piezoelectric device comprises a piezoelectric body and electrodes for applying an electric field in a predetermined direction across the piezoelectric body. The piezoelectric body contains an inorganic compound polycrystal, which contains first ferroelectric substance crystals having orientational characteristics at the time free from electric field application and has characteristics such that, with application of at least a predetermined electric field E | 10-29-2009 |
20100079552 | PIEZOELECTRIC FILM AND METHOD FOR MANUFACTURING THE SAME, PIEZOELECTRIC DEVICE, AND LIQUID DISCHARGE APPARATUS - A piezoelectric film of a perovskite oxide represented by a general expression (P) below and has a pyrochlore free single phase perovskite structure with a/b≦1.06. | 04-01-2010 |
20100194824 | PIEZOELECTRIC MATERIAL, METHOD FOR PRODUCING PIEZOELECTRIC MATERIAL, PIEZOELECTRIC DEVICE AND LIQUID DISCHARGE DEVICE - A piezoelectric material of the invention includes a perovskite oxide (P) (which may contain inevitable impurities) represented by the formula below: | 08-05-2010 |
20100214369 | Piezoelectric film, method for forming piezoelectric film, piezoelectric device and liquid discharge device - A piezoelectric film of the present invention has a surface roughness value P-V of not more than 170.0 nm, which is defined by a difference between a maximum height (peak value P) and a minimum height (valley value V) on a film surface, a piezoelectric constant d | 08-26-2010 |
20100232043 | OPTICAL MODULE, METHOD FOR PRODUCTION THEREOF, AND IMAGING APPARATUS - An optical module includes a substrate, an optical element directly built in a predetermined area of the substrate, and a piezoelectric element directly formed on the substrate along the circumference of the optical element. The piezoelectric element drives the optical element, by displacing the predetermined area of the substrate, in such a manner to displace the optical element in the direction of the optical axis of the optical element or to incline the optical axis of the optical element. | 09-16-2010 |
20110074248 | PIEZOELECTRIC MEMS ELEMENT, VOLTAGE CONTROL OSCILLATOR, COMMUNICATION APPARATUS, AND METHOD OF MANUFACTURING PIEZOELECTRIC DRIVE TYPE MEMS ELEMENT - A piezoelectric drive type MEMS element includes: a first substrate including, in a portion thereof, a movable part which is driven by a piezoelectric drive section to be displaced in a convex shape, a movable electrode being provided on a surface of the movable part; and a second substrate which is bonded to the first substrate and supports a fixed electrode facing the movable electrode via a prescribed gap, wherein the piezoelectric drive section includes a piezoelectric film provided on a region of the first substrate which forms the movable part as a portion of the movable part, and a pair of electrodes disposed so as to sandwich the piezoelectric film. | 03-31-2011 |
20140240404 | PASSIVATION OF RING ELECTRODES - An inkjet device includes a pumping chamber bounded by a wall, a piezoelectric layer disposed above the pumping chamber, a ring electrode having an annular lower portion disposed on the piezoelectric layer. A moisture barrier layer covers a remainder of the piezoelectric layer over the pumping chamber that is not covered by the annular lower portion of the ring electrode. | 08-28-2014 |
Patent application number | Description | Published |
20080218559 | PIEZOELECTRIC DEVICE, PROCESS FOR PRODUCING THE SAME, AND LIQUID DISCHARGE DEVICE - A piezoelectric device includes a substrate; and a laminated film formed above the substrate. The laminated film includes a lower electrode layer, a piezoelectric layer, and an upper electrode layer formed in this order, and the lower electrode layer is a metal electrode layer containing as one or more main components one or more nonnoble metals and/or one or more nonnoble alloys. Preferably, the one or more main components are one or more of the metals Cr, W, Ti, Al, Fe, Mo, In, Sn, Ni, Cu, Co, and Ta, and alloys of the metals. | 09-11-2008 |
20110074888 | Piezoelectric Actuator, Method of Driving Same, Liquid Ejection Apparatus and Piezoelectric Ultrasonic Osicllator - A method of driving a piezoelectric actuator including: a piezoelectric element containing a piezoelectric body having coercive field points on a negative field side and a positive field side respectively and having asymmetrical bipolar polarization—electric field hysteresis characteristics in which an absolute value of a coercive electric field on the negative field side and a coercive electric field value on the positive field side are mutually different, and a pair of electrodes for applying voltage to the piezoelectric body; and a diaphragm which externally transmits, as displacement, distortion produced in the piezoelectric body when the voltage is applied to the piezoelectric body, includes the step of driving the piezoelectric actuator between a positive drive voltage and a negative drive voltage in a range not exceeding the coercive electric field, from among the positive and negative coercive electric fields, which has the larger absolute value. | 03-31-2011 |
Patent application number | Description | Published |
20090066763 | PIEZOELECTRIC DEVICE, INK-JET HEAD USING THE SAME, AND PROCESS FOR PRODUCING THE SAME - The piezoelectric device includes a substrate, a first electrode formed on the substrate, a piezoelectric film formed on the first electrode and a second electrode formed on a second side of the piezoelectric film which is away from a first side where the first electrode is formed. The first electrode is composed of a first layer in contact with the substrate and a second layer in contact with the piezoelectric film. The first layer is formed of a material that is wet etched at a different rate than the substrate. The in %-jet head includes the piezoelectric device, a liquid droplet storing/ejecting member for ejecting ink droplets through a ink spout and provided on the piezoelectric device and a diaphragm for vibrating in response to expansion or contraction of the piezoelectric device and provided between the piezoelectric device and the liquid droplet storing/ejecting member. | 03-12-2009 |
20090085443 | Piezoelectric device and liquid-ejecting head - The piezoelectric device includes a substrate, a first electrode deposited on the substrate, a piezoelectric film deposited on top of at least a part of the first electrode by vapor phase deposition, a second electrode deposited on the piezoelectric film and having a water vapor transmission rate of not more than 1 g/m | 04-02-2009 |
20100039482 | MULTILAYER BODY, PIEZOELECTRIC ELEMENT, AND LIQUID EJECTING DEVICE - A multilayer body which includes a low-resistance metal layer having a low electrical resistance, excellent thermal resistance and low surface irregularity is provided. The multilayer body includes a substrate, and a low-resistance metal layer which is formed on the substrate and has a single-layer structure or a multilayer structure of two or more sublayers. The low-resistance metal layer includes a gold-containing layer or sublayer composed of gold and another metal. | 02-18-2010 |
20100066788 | PEROVSKITE-TYPE OXIDE FILM, PIEZOELECTRIC THIN-FILM DEVICE AND LIQUID EJECTING DEVICE USING PEROVSKITE-TYPE OXIDE FILM, AS WELL AS PRODUCTION PROCESS AND EVALUATION METHOD FOR PEROVSKITE-TYPE OXIDE FILM - Provided is a perovskite-type oxide film having a perovskite-type crystal structure and containing lead as a chief component, which, when subjected to Raman microspectroscopy at a plurality of points on a surface thereof so as to measure Raman spectra upon application of an electric field of 100 kV/cm and upon application of no electric field, has a mean of absolute values of peak shift amounts that is 2.2 cm | 03-18-2010 |