Patents by Inventor Koichi Yamaguchi
Koichi Yamaguchi 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).
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Publication number: 20190156991Abstract: An electronic component comprising a coil component having an element body containing ceramic, a coil disposed in the element body, and an external electrode disposed in the element body and electrically connected to the coil; and a mold resin sealing the coil component. The electronic component further comprises an electrode film in contact with an outer surface of the mold resin; and a connection conductor disposed in the mold resin and electrically connecting the external electrode and the electrode film.Type: ApplicationFiled: October 30, 2018Publication date: May 23, 2019Applicant: Murata Manufacturing Co., Ltd.Inventors: Koichi YAMAGUCHI, Koshi HIMEDA
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Patent number: 10199168Abstract: A laminated ceramic electronic component provided with a component main body formed by alternatively laminating multiple dielectric ceramic layers and multiple internal electrode layers, and external electrodes disposed on the end faces where the internal electrode layers of the component main body are exposed, wherein at least a part of the multiple internal electrode layers exposed on the end faces of the component main body are provided with end-face electrode portions that connect the adjacent internal electrode layers, the connecting portions are present between the end-face electrode portions and the dielectric ceramic layers that contact with the end-face electrode portions, and the external electrodes are disposed so that the end-face electrode portions are covered.Type: GrantFiled: January 21, 2016Date of Patent: February 5, 2019Assignee: TDK CORPORATIONInventors: Koichi Yamaguchi, Keisuke Ishida, Makoto Endo, Shimpei Tanabe
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Patent number: 10090106Abstract: A laminated ceramic electronic component with a cuboid-shaped element main body having a first main face and a second main face elongating along the length direction and the width direction, a first side face and a second side face elongating along the length direction and the height direction, and a first end face and a second end face elongating along the width direction and the height direction; and a pair of internal electrode layers opposite to each other in the height direction inside the element main body with a dielectric layer interposed therebetween in such a manner that they are exposed at the first end face or the second end face, wherein the thickness of the dielectric layer becomes larger from central portion to the first side face and the second side face.Type: GrantFiled: January 28, 2016Date of Patent: October 2, 2018Assignee: TDK CORPORATIONInventors: Makoto Endo, Keisuke Ishida, Koichi Yamaguchi, Shimpei Tanabe
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Publication number: 20180211754Abstract: A flexible inductor includes a coil substrate having a first spiral conductor formed in or on a bottom surface, a first magnetic sheet laminated on a top surface of the coil substrate, and a second magnetic sheet laminated on the bottom surface of the coil substrate. The flexible inductor includes a plurality of outer electrodes including a first outer electrode and a second outer electrode that are disposed in a peripheral portion of the bottom surface of the coil substrate, and cutout portions each formed in an area between the first spiral conductor and each of the outer electrodes so as to penetrate through the coil substrate. The first outer electrode is electrically connected to an outermost end portion of the first spiral conductor. The second outer electrode is electrically connected to an innermost end portion of the first spiral conductor.Type: ApplicationFiled: January 9, 2018Publication date: July 26, 2018Applicant: Murata Manufacturing Co., Ltd.Inventors: Masashi HATTORI, Koichi YAMAGUCHI, Hideji KIHARA
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Patent number: 10005872Abstract: The present invention provides an active energy ray-curable composition exhibiting high curability and having excellent offset printability when used for a printing ink, an active energy ray-curable printing ink having both excellent curability and offset printability, and a printed matter using the same. An active energy ray-curable composition includes a urethane (meth)acrylate resin (A) and a polymerization initiator (B), wherein the urethane (meth)acrylate resin (A) is produced by using an aromatic polyisocyanate (a), a hydroxyl group-containing mono(meth)acrylate (b), and a polyol (c) as essential reaction raw materials so that the ratio [(b?)/(a?)] of the number of moles (b?) of hydroxyl groups contained in the hydroxyl group-containing mono(meth)acrylate (b) to the number of moles (a?) of isocyanate groups contained in the aromatic polyisocyanate (a) is within a range of 0.99 to 0.40, and the urethane (meth)acrylate resin (A) has a (meth)acryloyl group concentration within a range of 1.5 to 4.0 mmol/g.Type: GrantFiled: August 27, 2015Date of Patent: June 26, 2018Assignee: DIC CORPORATIONInventors: Yumiko Nakamura, Yoshinobu Deguchi, Keisuke Wakahara, Koichi Yamaguchi, Tatsushi Okuda
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Publication number: 20180166980Abstract: A shield includes an inductor that includes outer electrodes and that is mounted on a substrate in or on which a wiring pattern is formed, a second capacitor that is electrically connected between one of the outer electrodes of the inductor and a ground pattern formed in or on the substrate, and a shield member that is disposed so as to cover the inductor and electrically connected to the one of the outer electrodes of the inductor, to which the second capacitor is connected. The second capacitor has frequency characteristics such that, when the self-resonance frequency of the second capacitor serves as a boundary, the impedance of the second capacitor decreases as the frequency increases on the low frequency side and that the impedance of the second capacitor increases as the frequency increases on the high frequency side.Type: ApplicationFiled: December 6, 2017Publication date: June 14, 2018Applicant: Murata Manufacturing Co., Ltd.Inventors: Kenichi ITO, Shun TAKAI, Koichi YAMAGUCHI
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Patent number: 9997288Abstract: An electronic component includes a body and a coil. The body includes first to fourth insulator layers composed of an anisotropic magnetic material, an internal magnetic circuit composed of an isotropic magnetic material and an external magnetic circuit composed of an isotropic magnetic material. The second and third insulator layers cover an upper surface and a lower surface of the coil from a z-axis direction. The internal magnetic circuit and the external magnetic circuit are adjacent to each other in a direction orthogonal to the z-axis direction. In addition, a direction of easy magnetization of the anisotropic magnetic material used in the first to fourth insulator layers is orthogonal to the z-axis direction.Type: GrantFiled: October 1, 2015Date of Patent: June 12, 2018Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Koichi Yamaguchi, Masaki Kitajima, Akinori Hamada
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Publication number: 20180130596Abstract: A flexible inductor mounted on a flexible substrate can be deformed while following deflection of the flexible substrate over time, and has high resistance to drop impact. The flexible inductor includes a coil substrate having a spiral conductor on at least one of upper and lower surfaces, and first and second magnetic sheets laminated on the upper and lower surfaces, respectively. First and second outer electrodes are provided in a peripheral edge portion of the lower surface. The first and second electrodes make direct contact with the lower surface, and are electrically connected to outermost and innermost end portions, respectively, of the spiral conductor. The second magnetic sheet is laminated on the lower surface other than portions corresponding to the first and second outer electrodes. Thicknesses of the first and second outer electrodes are equal to or larger than a thickness of the second magnetic sheet.Type: ApplicationFiled: January 5, 2018Publication date: May 10, 2018Applicant: Murata Manufacturing Co., Ltd.Inventor: Koichi YAMAGUCHI
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Publication number: 20170313804Abstract: The present invention provides an active energy ray-curable composition exhibiting high curability and having excellent offset printability when used for a printing ink, an active energy ray-curable printing ink having both excellent curability and offset printability, and a printed matter using the same. An active energy ray-curable composition includes a urethane (meth)acrylate resin (A) and a polymerization initiator (B), wherein the urethane (meth)acrylate resin (A) is produced by using an aromatic polyisocyanate (a), a hydroxyl group-containing mono(meth)acrylate (b), and a polyol (c) as essential reaction raw materials so that the ratio [(b?)/(a?)] of the number of moles (b?) of hydroxyl groups contained in the hydroxyl group-containing mono(meth)acrylate (b) to the number of moles (a?) of isocyanate groups contained in the aromatic polyisocyanate (a) is within a range of 0.99 to 0.40, and the urethane (meth)acrylate resin (A) has a (meth)acryloyl group concentration within a range of 1.5 to 4.0 mmol/g.Type: ApplicationFiled: August 27, 2015Publication date: November 2, 2017Applicant: DIC CorporationInventors: Yumiko NAKAMURA, Yoshinobu DEGUCHI, Keisuke WAKAHARA, Koichi YAMAGUCHI, Tatsushi OKUDA
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Patent number: 9607767Abstract: A laminate-type ceramic electric component such as laminated ceramic capacitor which has excellent mechanical strength and also has thermal shock resistance at the same time is provided. A laminate-type ceramic electronic component includes an inner layer part, in which dielectric layers including ABO3 (which represents a perovskite crystal in which A contains at least Ba and B contains at least Ti) as a main component and internal electrode layers are alternately laminated; and a pair of outer layer parts which sandwich the inner layer part, wherein the outer layer parts include a continuous film containing a Ba—Si—Ti—O based crystal phase.Type: GrantFiled: August 18, 2014Date of Patent: March 28, 2017Assignee: TDK CorporationInventors: Makoto Endo, Koichi Yamaguchi, Keisuke Ishida
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Publication number: 20170040103Abstract: First and second coils are disposed coaxially with a gap provided therebetween and are configured to mutually cancel out magnetic fields provided thereby. A receptacle portion that defines a space traversing at least a portion of a magnetic flux produced by the coils is provided, and a magnetic powder is contained in the receptacle portion so as to occupy a portion of the space. The magnetic powder moves within the space, and this movement produces a change in the magnetic flux. This change in the magnetic flux appears in the form of a change in the inductance value.Type: ApplicationFiled: July 6, 2016Publication date: February 9, 2017Applicant: MURATA MANUFACTURING CO., LTD.Inventor: Koichi YAMAGUCHI
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Patent number: 9530566Abstract: The present invention aims to suppress the cracks and delamination to improve the bending strength of multilayer ceramic electronic component with internal electrode layers wherein the thickness of the internal electrode layer is 0.5 ?m or less. The multilayer ceramic electronic component is a laminated body having internal electrode layers and dielectric ceramic layers which are laminated alternately. The internal electrode layers have electrode discontinuity portion. In a part of the electrode discontinuity portion, a dielectric ceramic particle bigger than the thickness of the dielectric ceramic layer is contained when the cross section is observed from the direction perpendicular to the laminating plane of the laminated body.Type: GrantFiled: December 19, 2014Date of Patent: December 27, 2016Assignee: TDK CORPORATIONInventors: Keisuke Ishida, Makoto Endo, Koichi Yamaguchi
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Publication number: 20160350895Abstract: A device including: a source string orientation deciding section (23) for deciding a source string orientation, the source string orientation being an orientation of a character string to be translated; a source string orientation display control section (24) for controlling a display section to display source string orientation information indicating the source string orientation; and a translation section (26) for translating characters as a character string having the source string orientation.Type: ApplicationFiled: August 19, 2014Publication date: December 1, 2016Inventors: Koichi YAMAGUCHI, Hirokazu ISHIKAWA, Seigoh SASAKI
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Publication number: 20160329151Abstract: The present invention aims to suppress the cracks and delamination to improve the bending strength of multilayer ceramic electronic component with internal electrode layers wherein the thickness of the internal electrode layer is 0.5 ?m or less. The multilayer ceramic electronic component is a laminated body having internal electrode layers and dielectric ceramic layers which are laminated alternately. The internal electrode layers have electrode discontinuity portion. In a part of the electrode discontinuity portion, a dielectric ceramic particle bigger than the thickness of the dielectric ceramic layer is contained when the cross section is observed from the direction perpendicular to the laminating plane of the laminated body.Type: ApplicationFiled: December 19, 2014Publication date: November 10, 2016Applicant: TDK CORPORATIONInventors: Keisuke ISHIDA, Makoto ENDO, Koichi YAMAGUCHI
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Publication number: 20160225526Abstract: A laminated ceramic electronic component with a cuboid-shaped element main body having a first main face and a second main face elongating along the length direction and the width direction, a first side face and a second side face elongating along the length direction and the height direction, and a first end face and a second end face elongating along the width direction and the height direction; and a pair of internal electrode layers opposite to each other in the height direction inside the element main body with a dielectric layer interposed therebetween in such a manner that they are exposed at the first end face or the second end face, wherein the thickness of the dielectric layer becomes larger from central portion to the first side face and the second side face.Type: ApplicationFiled: January 28, 2016Publication date: August 4, 2016Applicant: TDK CORPORATIONInventors: Makoto ENDO, Keisuke ISHIDA, Koichi YAMAGUCHI, Shimpei TANABE
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Publication number: 20160217930Abstract: A laminated ceramic electronic component provided with a component main body formed by alternatively laminating multiple dielectric ceramic layers and multiple internal electrode layers, and external electrodes disposed on the end faces where the internal electrode layers of the component main body are exposed, wherein at least a part of the multiple internal electrode layers exposed on the end faces of the component main body are provided with end-face electrode portions that connect the adjacent internal electrode layers, the connecting portions are present between the end-face electrode portions and the dielectric ceramic layers that contact with the end-face electrode portions, and the external electrodes are disposed so that the end-face electrode portions are covered.Type: ApplicationFiled: January 21, 2016Publication date: July 28, 2016Applicant: TDK CORPORATIONInventors: Koichi YAMAGUCHI, Keisuke ISHIDA, Makoto ENDO, Shimpei TANABE
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Publication number: 20160099098Abstract: An electronic component includes a body and a coil. The body includes first to fourth insulator layers composed of an anisotropic magnetic material, an internal magnetic circuit composed of an isotropic magnetic material and an external magnetic circuit composed of an isotropic magnetic material. The second and third insulator layers cover an upper surface and a lower surface of the coil from a z-axis direction. The internal magnetic circuit and the external magnetic circuit are adjacent to each other in a direction orthogonal to the z-axis direction. In addition, a direction of easy magnetization of the anisotropic magnetic material used in the first to fourth insulator layers is orthogonal to the z-axis direction.Type: ApplicationFiled: October 1, 2015Publication date: April 7, 2016Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Koichi YAMAGUCHI, Masaki KITAJIMA, Akinori HAMADA
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Patent number: 9252987Abstract: A communication device includes a transmission equalizer that equalizes a transmission signal transmitted in a signal transmission performed via a non-contact coupling, the transmission equalizer creates a plurality of equivalent transmission signals by branching the transmission signal. The transmission equalizer includes a plurality of signal paths that respectively provide time delays different from each other to the equivalent transmission signals, and an output path that provides a filter output based on the total sum of outputs of the signal paths to the non-contact coupling, and at least one of the plurality of signal paths includes a variable delay circuit that can change a time delay to be given to the corresponding transmission signal.Type: GrantFiled: December 22, 2014Date of Patent: February 2, 2016Assignee: RENESAS ELECTRONICS CORPORATIONInventors: Masaharu Matsudaira, Koichi Yamaguchi, Kenichiro Hijioka
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Publication number: 20150251612Abstract: The purpose of the present invention is to charge a battery for supplying power to an electrically-powered auxiliary machine, while achieving lower fuel consumption, lower exhaust gas emissions, and lower noise. In a vehicle having an electrically-powered compressor, a battery for supplying power to the electrically-powered compressor, and a generator for generating power to charge the battery or power to be supplied to the electrically-powered compressor, the drive shaft of the generator is directly coupled to the shaft of the engine or is an integral part of the shaft of the engine. The generator is designed to carry out regenerative power generation during deceleration or during driving on a down grade.Type: ApplicationFiled: August 21, 2013Publication date: September 10, 2015Applicant: HINO MOTORS, LTD.Inventors: Yoshiyuki Hyoudou, Koichi Yamaguchi
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Publication number: 20150256230Abstract: In a related transmitting circuit employing electromagnetic induction that is used in a communication system, there is a problem in that, because only one inductor is used in the transmitting circuit, it is impossible to perform communication at a data rate higher than the self-resonant frequency of the inductor. A transmitting circuit according to an embodiment of the present invention is a transmitting circuit that drives an inductor to transmit data to a semiconductor chip insulated from a semiconductor chip on which the transmitting circuit is mounted, and includes a driving circuit that receives outgoing data transmitted at a data rate higher than the self-resonant frequency of the inductor and outputs an outgoing signal that drives the inductor at the data rate of the outgoing data.Type: ApplicationFiled: May 22, 2015Publication date: September 10, 2015Applicant: RENESAS ELECTRONICS CORPORATIONInventor: Koichi YAMAGUCHI