Patents by Inventor Takao Ohnishi
Takao Ohnishi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20240012038Abstract: An electronic component includes a first surface with a first electrode and a second surface with a second electrode. A measuring instrument includes a first terminal and a second terminal. Only the second surface out of the first surface and the second surface is adhered to a conductive adhesive sheet. The first terminal of a measuring instrument is electrically connected to the first electrode at the first surface, the second terminal of the measuring instrument is electrically connected to the second electrode through the conductive adhesive sheet at the second surface, and the electronic component is measured using the measuring instrument.Type: ApplicationFiled: September 22, 2023Publication date: January 11, 2024Inventors: Ryusuke IKEDA, Tomohiko HIBINO, Takao OHNISHI
-
Publication number: 20220232672Abstract: An electrode-embedded ceramic structure includes: a ceramic shaft, wherein an electrode is disposed on an outer circumference thereof; and a ceramic tube housing the ceramic shaft therein and coupled to the ceramic shaft. In this electrode-embedded ceramic structure, spaces are provided locally between the ceramic shaft and the ceramic tube.Type: ApplicationFiled: April 4, 2022Publication date: July 21, 2022Applicant: NGK Insulators, Ltd.Inventors: Takao OHNISHI, Daishi TANABE, Akifumi MORISHITA
-
Publication number: 20220214204Abstract: An electrode embedded ceramic structure includes: a first ceramic layer; an electrode layer formed on the first ceramic layer; and a second ceramic layer covering the first ceramic layer and the electrode layer, the second ceramic layer being thinner than the first ceramic layer. In a cross section of the first ceramic layer, the electrode layer, and the second ceramic layer along a laminating direction in this electrode embedded ceramic structure, L1, L2, and L3 satisfy (L1+L2)/L3?2.2, where L1 denotes a length of the electrode layer on the first ceramic layer, L2 denotes a length of the electrode layer on the second ceramic layer, and L3 denotes a length of the electrode layer in a direction orthogonal to the laminating direction.Type: ApplicationFiled: March 25, 2022Publication date: July 7, 2022Applicant: NGK Insulators, Ltd.Inventors: Takao OHNISHI, Daishi TANABE, Akifumi MORISHITA
-
Publication number: 20220214205Abstract: An electrode embedded ceramic structure includes: a first ceramic layer; an electrode layer formed on the first ceramic layer; and a second ceramic layer covering the first ceramic layer and the electrode layer, the second ceramic layer being thinner than the first ceramic layer. In a cross section of the first ceramic layer, the electrode layer, and the second ceramic layer along a laminating direction in this electrode embedded ceramic structure, T1 and T2 satisfy Equation (T2?T1)/T2?0.15, where T1 denotes a least thickness in the second ceramic layer, and T2 denotes an average thickness of the second ceramic layer.Type: ApplicationFiled: March 25, 2022Publication date: July 7, 2022Applicant: NGK Insulators, Ltd.Inventors: Takao OHNISHI, Daishi TANABE, Akifumi MORISHITA
-
Patent number: 9505201Abstract: A method for manufacturing a ceramic device is provided including fixing a ceramic substrate to a reinforcing plate via a sacrifice layer, forming a groove, which penetrates the ceramic substrate and the sacrifice layer and reaches the reinforcing plate, on an upper surface of the ceramic substrate to divide the ceramic substrate into plural ceramic substrates, and removing the sacrifice layer.Type: GrantFiled: September 27, 2013Date of Patent: November 29, 2016Assignee: NGK Insulators, Ltd.Inventors: Masayuki Uetani, Takao Ohnishi, Takeshi Kaku
-
Patent number: 9246081Abstract: There is provided a method for manufacturing a piezoelectric element, the method having a step of polarizing the fired piezoelectric body while fixing at least two positions in a direction perpendicular to the polarization direction. The method is a means for obtaining a piezoelectric element provided with a thin and flat fired piezoelectric body with no warpage.Type: GrantFiled: October 12, 2011Date of Patent: January 26, 2016Assignee: NGK Insulators, Ltd.Inventors: Takao Ohnishi, Masayuki Uetani
-
Patent number: 9240544Abstract: A method of manufacturing a piezoelectric element including a step of preparing a green sheet A including a portion which becomes a fired piezoelectric body later, by use of a piezoelectric material; a step of joining, to at least one surface of the green sheet A, a green sheet B having an opening in a portion facing the portion which becomes the fired piezoelectric body later, followed by firing to obtain the fired piezoelectric body provided with a reinforcing plate to which the reinforcing plate formed owing to the firing of the green sheet B is attached; and a step of forming a film-like electrode in a portion obtained by the firing of the green sheet A in the fired piezoelectric body provided with the reinforcing plate.Type: GrantFiled: May 25, 2011Date of Patent: January 19, 2016Assignee: NGK Insulators, Ltd.Inventors: Takao Ohnishi, Hideki Shimizu, Takashi Ebigase
-
Patent number: 9190604Abstract: A manufacturing method for a thin board-shaped fired piezoelectric body has: a step of manufacturing, using a piezoelectric material, a green sheet having a ratio T/L of 0.000002 to 0.2, where T is the thickness and L is the maximum length within the surface after firing; and a step of obtaining the thin board-shaped fired piezoelectric body with reinforcing members for firing by performing firing after disposing the reinforcing members for firing by scattering at least on one surface of the green sheet so as to exclude the areas to be the thin board-shaped fired piezoelectric body later. The piezoelectric body which has excellent planarity and a thin board shape can be manufactured at low cost by the method.Type: GrantFiled: October 14, 2011Date of Patent: November 17, 2015Assignee: NGK Insulators, Ltd.Inventors: Nobuo Takahashi, Takao Ohnishi
-
Patent number: 9142750Abstract: A piezoelectric element is provided with a ceramic substrate including a first surface on which a groove is formed, and a first electrode formed on the first surface of the ceramic substrate and including a crossing part that extends over the groove. At least one void is formed between a bottom of the groove and the crossing part of the first electrode.Type: GrantFiled: February 19, 2013Date of Patent: September 22, 2015Assignee: NGK Insulators, Ltd.Inventors: Takao Ohnishi, Hideki Shimizu, Masayuki Uetani
-
Patent number: 8680742Abstract: There is provided a method for testing a piezoelectric/electrostrictive actuator, wherein the displacement of a piezoelectric/electrostrictive actuator is estimated on the basis of the relations between one or more frequency characteristic values selected from the group consisting of the heights and areas of the peaks of the resonance waveforms and the difference of the maximum and minimum of the first order or first to higher orders of the resonance frequency characteristic values of the piezoelectric/electrostrictive actuator and the k-th order (k=1 to 4) of the first or first to higher orders of resonance frequencies. According to this piezoelectric/electrostrictive actuator testing method, a piezoelectric/electrostrictive actuator can be tested with high precision without actually driving the same as a product and without being accompanied by any disassembly/breakage.Type: GrantFiled: October 5, 2012Date of Patent: March 25, 2014Assignee: NGK Insulators, Ltd.Inventors: Naoki Goto, Takao Ohnishi
-
Patent number: 8664828Abstract: There is provided a method for testing a piezoelectric/electrostrictive actuator, wherein the displacement of a piezoelectric/electrostrictive actuator is estimated on the basis of the relations between one or more frequency characteristic values selected from the group consisting of the heights and areas of the peaks of the resonance waveforms and the difference of the maximum and minimum of the first order or first to higher orders of the resonance frequency characteristic values of the piezoelectric/electrostrictive actuator and the k-th order (k=1 to 4) of the first or first to higher orders of resonance frequencies. According to this piezoelectric/electrostrictive actuator testing method, a piezoelectric/electrostrictive actuator can be tested with high precision without actually driving the same as a product and without being accompanied by any disassembly/breakage.Type: GrantFiled: October 5, 2012Date of Patent: March 4, 2014Assignee: NGK Insulators, Ltd.Inventors: Naoki Goto, Takao Ohnishi
-
Publication number: 20140027053Abstract: A provided method for manufacturing a ceramic device 62 includes fixing a ceramic substrate 10 to a reinforcing plate 20 via a sacrifice layer 30, forming a groove, which penetrates the ceramic substrate 10 and the sacrifice layer 30 and reaches the reinforcing plate 20, on an upper surface of the ceramic substrate 10 to divide the ceramic substrate 10 into plural ceramic substrates, and removing the sacrifice layer 30.Type: ApplicationFiled: September 27, 2013Publication date: January 30, 2014Applicant: NGK INSULATORS, LTD.Inventors: Masayuki UETANI, Takao OHNISHI, Takeshi KAKU
-
Patent number: 8528408Abstract: A passage detection apparatus is configured to detect the change in the properties (propagation state of sound wave, dielectric constant, etc.) of a specific space, which changes according to the passage of an object in the specific space and the size of the object. The passage detection apparatus includes a pair of detection units and configured to transmit and receive signals to and from an external device. The specific space is formed by the space between the detection unit and the detection unit. The detection unit is supported by a first substrate. The detection unit is supported by a second substrate that is parallel to the first substrate, and arranged at the position corresponding to the detection unit supported by the first substrate.Type: GrantFiled: November 18, 2011Date of Patent: September 10, 2013Assignee: NGK Insulators, Ltd.Inventors: Takao Ohnishi, Kunihiko Yoshioka, Shuhei Fujita
-
Patent number: 8476805Abstract: There is disclosed a piezoelectric/electrostrictive element which can be used as a sensor, even if a piezoelectric/electrostrictive layer cracks. Provided is a piezoelectric/electrostrictive element comprising a substrate, a lower electrode layer secured onto the substrate, and a piezoelectric/electrostrictive layer secured onto the lower electrode layer, and the coverage of the lower electrode layer with respect to the substrate is 98% or less.Type: GrantFiled: January 26, 2010Date of Patent: July 2, 2013Assignee: NGK Insulators, Ltd.Inventors: Takao Ohnishi, Yuhji Umeda, Naoki Goto
-
Publication number: 20130093291Abstract: There is provided a method for testing a piezoelectric/electrostrictive actuator, wherein the displacement of a piezoelectric/electrostrictive actuator is estimated on the basis of the relations between one or more frequency characteristic values selected from the group consisting of the heights and areas of the peaks of the resonance waveforms and the difference of the maximum and minimum of the first order or first to higher orders of the resonance frequency characteristic values of the piezoelectric/electrostrictive actuator and the k-th order (k=1 to 4) of the first or first to higher orders of resonance frequencies. According to this piezoelectric/electrostrictive actuator testing method, a piezoelectric/electrostrictive actuator can be tested with high precision without actually driving the same as a product and without being accompanied by any disassembly/breakage.Type: ApplicationFiled: October 5, 2012Publication date: April 18, 2013Applicant: NGK INSULATORS, LTD.Inventors: Naoki GOTO, Takao OHNISHI
-
Patent number: 8375538Abstract: There is provided a method for manufacturing a piezoelectric actuator where the planar shape is adjusted by subjecting the piezoelectric body layer located on one of the outer surfaces in the two or more piezoelectric body layers to a polarization treatment to control remnant polarization of the piezoelectric body layer. The piezoelectric actuator is used as a drive portion of a piezoelectric drive type variable capacitor. The variable capacitor has high mechanical strength and excellent reliability for a long period of time. The relation between the displacement amount of the piezoelectric actuator and the capacity of the capacitor is stable, and the variable capacity is wide.Type: GrantFiled: March 23, 2010Date of Patent: February 19, 2013Assignee: NGK Insulators, Ltd.Inventors: Hideki Shimizu, Takao Ohnishi, Takashi Ebigase, Naoki Goto
-
Publication number: 20130033266Abstract: There is provided a method for testing a piezoelectric/electrostrictive actuator, wherein the displacement of a piezoelectric/electrostrictive actuator is estimated on the basis of the relations between one or more frequency characteristic values selected from the group consisting of the heights and areas of the peaks of the resonance waveforms and the difference of the maximum and minimum of the first order or first to higher orders of the resonance frequency characteristic values of the piezoelectric/electrostrictive actuator and the k-th order (k=1 to 4) of the first or first to higher orders of resonance frequencies. According to this piezoelectric/electrostrictive actuator testing method, a piezoelectric/electrostrictive actuator can be tested with high precision without actually driving the same as a product and without being accompanied by any disassembly/breakage.Type: ApplicationFiled: October 5, 2012Publication date: February 7, 2013Applicant: NGK Insulators, Ltd.Inventors: Naoki GOTO, Takao OHNISHI
-
Patent number: 8304961Abstract: There is provided a method for testing a piezoelectric/electrostrictive actuator, wherein the displacement of a piezoelectric/electrostrictive actuator is estimated on the basis of the relations between one or more frequency characteristic values selected from the group consisting of the heights and areas of the peaks of the resonance waveforms and the difference of the maximum and minimum of the first order or first to higher orders of the resonance frequency characteristic values of the piezoelectric/electrostrictive actuator and the k-th order (k=1 to 4) of the first or first to higher orders of resonance frequencies. According to this piezoelectric/electrostrictive actuator testing method, a piezoelectric/electrostrictive actuator can be tested with high precision without actually driving the same as a product and without being accompanied by any disassembly/breakage.Type: GrantFiled: October 15, 2010Date of Patent: November 6, 2012Assignee: NGK Insulators, Ltd.Inventors: Naoki Goto, Takao Ohnishi
-
Patent number: 8291558Abstract: A method for manufacturing a piezoelectric/electrostrictive element includes a step of subjecting the piezoelectric/electrostrictive film to a heat treatment and a polarization treatment after the film is allowed to stand until the value of an electric constant has converged after the heat treatment. The piezoelectric/electrostrictive element manufactured in this method has small stress remaining in the piezoelectric/electrostrictive film, and predetermined performance regarding, for example, a displacement amount, a displacement-generating force, and an electric power efficiency (consumed electric power) as a piezoelectric/electrostrictive element (piezoelectric/electrostrictive film) is never spoiled.Type: GrantFiled: December 21, 2007Date of Patent: October 23, 2012Assignee: NGK Insulators, Ltd.Inventors: Takao Ohnishi, Takashi Wada, Tomohiro Yamada, Makoto Tani
-
Publication number: 20120117769Abstract: There is provided a method for manufacturing a piezoelectric element, the method having a step of polarizing the fired piezoelectric body while fixing at least two positions in a direction perpendicular to the polarization direction. The method is a means for obtaining a piezoelectric element provided with a thin and flat fired piezoelectric body with no warpage.Type: ApplicationFiled: October 12, 2011Publication date: May 17, 2012Applicant: NGK Insulators, Ltd.Inventors: Takao OHNISHI, Masayuki Uetani