Patents by Inventor Hitoshi Kuromi
Hitoshi Kuromi 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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Patent number: 10176929Abstract: A solid electrolytic capacitor that includes a capacitor element that having an anode with a core portion and a porous portion, a dielectric layer covering the porous portion, and a cathode including a solid electrolyte layer covering at least part of the dielectric layer; an exterior body that encloses the capacitor element so as to expose an end of the anode; a first external electrode connected to the cathode; and a second external electrode connected to the end of the anode. The thickness of the porous portion at the end of the anode that is exposed from the exterior member is smaller than the thickness of the porous portion in a region covered by the cathode.Type: GrantFiled: November 17, 2016Date of Patent: January 8, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Hitoshi Kuromi
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Patent number: 10032567Abstract: A solid electrolytic capacitor having grooves provided in a valve-acting metal substrate that includes a porous surface part and a non-porous body part, the bottoms of the grooves being non-porous. The valve-acting metal substrate is divided into a plurality of unit regions by the grooves, and define cathode layer formation parts in the porous surface parts for each unit region. A dielectric layer covers the surfaces of the cathode layer formation parts of the valve-acting metal substrate and the grooves between the cathode layer formation parts. A solid electrolyte layer and a cathode extraction layer cover the surface of the dielectric layer, thereby providing a sheet in which a plurality of solid electrolytic capacitor elements are prepared integrally with the grooves interposed therebetween. The sheet is cut at the grooves, and a dielectric layer is formed on the cut surfaces located around the cathode layer formation parts.Type: GrantFiled: December 12, 2016Date of Patent: July 24, 2018Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Koji Fujimoto, Emi Matsushita, Hitoshi Kuromi, Taro Ueno, Yoshihiro Koshido
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Patent number: 9978531Abstract: A solid electrolytic capacitor that includes a positive external electrode electrically connected to a core part of a valve-acting metal base included in a capacitor element, a first conductive layer in direct contact with the core part of the valve-acting metal base and covering one end surface of the valve-acting metal base and at least a part of an exterior located around the end surface.Type: GrantFiled: November 18, 2015Date of Patent: May 22, 2018Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Yuji Kimura, Hitoshi Kuromi, Koji Fujimoto
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Publication number: 20170140877Abstract: A solid electrolytic capacitor that includes a capacitor element that having an anode with a core portion and a porous portion, a dielectric layer covering the porous portion, and a cathode including a solid electrolyte layer covering at least part of the dielectric layer; an exterior body that encloses the capacitor element so as to expose an end of the anode; a first external electrode connected to the cathode; and a second external electrode connected to the end of the anode. The thickness of the porous portion at the end of the anode that is exposed from the exterior member is smaller than the thickness of the porous portion in a region covered by the cathode.Type: ApplicationFiled: November 17, 2016Publication date: May 18, 2017Inventor: Hitoshi Kuromi
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Publication number: 20170092432Abstract: A solid electrolytic capacitor having grooves provided in a valve-acting metal substrate that includes a porous surface part and a non-porous body part, the bottoms of the grooves being non-porous. The valve-acting metal substrate is divided into a plurality of unit regions by the grooves, and define cathode layer formation parts in the porous surface parts for each unit region. A dielectric layer covers the surfaces of the cathode layer formation parts of the valve-acting metal substrate and the grooves between the cathode layer formation parts. A solid electrolyte layer and a cathode extraction layer cover the surface of the dielectric layer, thereby providing a sheet in which a plurality of solid electrolytic capacitor elements are prepared integrally with the grooves interposed therebetween. The sheet is cut at the grooves, and a dielectric layer is formed on the cut surfaces located around the cathode layer formation parts.Type: ApplicationFiled: December 12, 2016Publication date: March 30, 2017Inventors: KOJI FUJIMOTO, Emi Matsushita, Hitoshi Kuromi, Taro Ueno, Yoshihiro Koshido
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Patent number: 9552928Abstract: A solid electrolytic capacitor having grooves provided in a valve-acting metal substrate that includes a porous surface part and a non-porous body part, the bottoms of the grooves being non-porous. The valve-acting metal substrate is divided into a plurality of unit regions by the grooves, and define cathode layer formation parts in the porous surface parts for each unit region. A dielectric layer covers the surfaces of the cathode layer formation parts of the valve-acting metal substrate and the grooves between the cathode layer formation parts. A solid electrolyte layer and a cathode extraction layer cover the surface of the dielectric layer, thereby providing a sheet in which a plurality of solid electrolytic capacitor elements are prepared integrally with the grooves interposed therebetween. The sheet is cut at the grooves, and a dielectric layer is formed on the cut surfaces located around the cathode layer formation parts.Type: GrantFiled: October 9, 2013Date of Patent: January 24, 2017Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Koji Fujimoto, Emi Matsushita, Hitoshi Kuromi, Taro Ueno, Yoshihiro Koshido
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Publication number: 20160071654Abstract: A solid electrolytic capacitor that includes a positive external electrode electrically connected to a core part of a valve-acting metal base included in a capacitor element, a first conductive layer in direct contact with the core part of the valve-acting metal base and covering one end surface of the valve-acting metal base and at least a part of an exterior located around the end surface.Type: ApplicationFiled: November 18, 2015Publication date: March 10, 2016Inventors: Yuji Kimura, Hitoshi Kuromi, Koji Fujimoto
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Patent number: 8780533Abstract: A solid electrolytic capacitor that includes a laminated body, a solid electrolyte layer, and conductive bases. The laminated body is obtained by laminating a plurality of dielectric-coated valve action metal sheets, each of which includes a valve action metal base and a dielectric coating, and joining together the adjacent valve action metal bases. The valve action metal base has a cathode layer part, and the dielectric coating covers the surface of the valve action metal base at least the cathode layer part. The valve action metal base of at least one of the dielectric-coated valve action metal sheets further has an anode lead part. The solid electrolyte layer is a continuous layer that fills gaps between the dielectric-coated valve action metal sheets and covers the outer surface of the laminated body at the cathode layer parts, and conductive bases are provided in the solid electrolyte layer.Type: GrantFiled: November 15, 2011Date of Patent: July 15, 2014Assignee: Murata Manufacturing Co., Ltd.Inventors: Hitoshi Kuromi, Taro Ueno, Koji Fujimoto, Emi Matsushita, Yoshihiro Koshido
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Publication number: 20140036417Abstract: A solid electrolytic capacitor having grooves provided in a valve-acting metal substrate that includes a porous surface part and a non-porous body part, the bottoms of the grooves being non-porous. The valve-acting metal substrate is divided into a plurality of unit regions by the grooves, and define cathode layer formation parts in the porous surface parts for each unit region. A dielectric layer covers the surfaces of the cathode layer formation parts of the valve-acting metal substrate and the grooves between the cathode layer formation parts. A solid electrolyte layer and a cathode extraction layer cover the surface of the dielectric layer, thereby providing a sheet in which a plurality of solid electrolytic capacitor elements are prepared integrally with the grooves interposed therebetween. The sheet is cut at the grooves, and a dielectric layer is formed on the cut surfaces located around the cathode layer formation parts.Type: ApplicationFiled: October 9, 2013Publication date: February 6, 2014Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Koji Fujimoto, Emi Matsushita, Hitoshi Kuromi, Taro Ueno, Yoshihiro Koshido
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Publication number: 20120286214Abstract: A resin electrode paste characterized by rapid drying of solvent and efficient formation of a electrode with high shape accuracy contains conductive material powder, solvent, and dissolved in the solvent, a first resin having a softening point maintaining a solid state at the drying temperature and 10 to 40 weight % of the combined resins of a second resin having a softening point at least 45° C. lower and which is liquid at the drying heating temperature. The conductive powder is dispersed in a cured resin by removing solvent by heating and curing the resin. An electronic component a surface resin electrode formed with the resin electrode paste is described.Type: ApplicationFiled: July 10, 2012Publication date: November 15, 2012Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Hitoshi Kuromi, Katsuaki Higashi
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Publication number: 20120194968Abstract: A solid electrolytic capacitor that includes a laminated body, a solid electrolyte layer, and conductive bases. The laminated body is obtained by laminating a plurality of dielectric-coated valve action metal sheets, each of which includes a valve action metal base and a dielectric coating, and joining together the adjacent valve action metal bases. The valve action metal base has a cathode layer part, and the dielectric coating covers the surface of the valve action metal base at least the cathode layer part. The valve action metal base of at least one of the dielectric-coated valve action metal sheets further has an anode lead part. The solid electrolyte layer is a continuous layer that fills gaps between the dielectric-coated valve action metal sheets and covers the outer surface of the laminated body at the cathode layer parts, and conductive bases are provided in the solid electrolyte layer.Type: ApplicationFiled: November 15, 2011Publication date: August 2, 2012Inventors: Hitoshi Kuromi, Taro Ueno, Koji Fujimoto, Emi Matsushita, Yoshihiro Koshido