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 |
20090160914 | PIEZOELECTRIC DEVICE, PROCESS FOR PRODUCING THE PIEZOELECTRIC DEVICE, AND INKJET RECORDING HEAD - A process for producing a piezoelectric device constituted by a first electrode, at least one second electrode, and a piezoelectric film sandwiched between the first electrode and the at least one second electrode so that an electric field can be applied to the piezoelectric film. First, a seed layer of a material containing at least one element is formed on a substrate, and then the first electrode is formed on the seed layer. Next, the at least one element is diffused through the first electrode so that the at least one element precipitates on a surface of the first electrode on the opposite side to the seed layer, and then the piezoelectric film is formed on the first electrode. | 06-25-2009 |
20110037812 | Columnar Structure Film and Method of Forming Same, Piezoelectric Element, Liquid Ejection Apparatus and Piezoelectric Ultrasonic Oscillator - The columnar structure film is formed on a surface of a substrate by vapor phase epitaxy, and is constituted of a plurality of columnar bodies extending in directions non-parallel to the surface of the substrate. In the columnar structure film, a relationship GS | 02-17-2011 |
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 |
20120082780 | WIRING MATERIAL, METHOD OF MANUFACTURING WIRING, AND NANO-PARTICLE DISPERSION - A wiring material contains copper, nitrogen, and a dopant which is more readily oxidized than copper in an Ellingham diagram, the dopant being added to the wiring material at a rate of not less than 0.5 at. % and not more than 10 at. %. | 04-05-2012 |
20120212102 | RESONANT TRANSDUCER AND ULTRASONIC TREATMENT DEVICE INCLUDING RESONANT TRANSDUCER - A resonant transducer comprising: | 08-23-2012 |
20120215243 | ULTRASONIC SURGICAL APPARATUS - An ultrasonic surgical apparatus includes a treatment portion, a driving portion which drives the treatment portion by resonance, an operation portion main body which drives and controls the driving portion, and a connecting portion which connects the treatment portion and the operation portion main body. The driving portion includes a piezoelectric film and is formed on the treatment portion inside the connecting portion. The piezoelectric film has a perovskite structure, with crystals constituting the perovskite structure being oriented in the (100) direction or the (001) direction with a degree of orientation of not less than 60%. | 08-23-2012 |
20120218352 | FLOW CHANNEL STRUCTURE, METHOD OF MANUFACTURING SAME, AND LIQUID EJECTION HEAD - A flow channel structure includes: a first substrate in which a first flow channel section is arranged; a first adhesive layer which is arranged on the first substrate; a first noble metal layer containing gold and arranged over the first adhesive layer on the first substrate; a second substrate in which a second flow channel section is arranged; a second adhesive layer arranged on the second substrate; a second noble metal layer containing gold and arranged over the second adhesive layer on the second substrate; and an Au tubular structure disposed between the first and second noble metal layers which face to each other across the Au tubular structure, the Au tubular structure having a hollow portion serving as a connecting flow channel section which connects the first and second flow channel sections, a gold content of the Au tubular structure being not lower than 90 at. %. | 08-30-2012 |
20120221029 | RESONANT TRANSDUCER, METHOD OF PRODUCING THE RESONANT TRANSDUCER, AND ULTRASONIC TREATMENT TOOL INCLUDING THE RESONANT TRANSDUCER - A resonant transducer comprising:
| 08-30-2012 |
20130099627 | PIEZOELECTRIC DEVICE AND METHOD OF MANUFACTURING PIEZOELECTRIC DEVICE - 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. | 04-25-2013 |
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 |