Patents by Inventor Norihiro Kawamura
Norihiro Kawamura 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: 20240114661Abstract: A thermal conductive member includes a thermal conductive sheet and an adhesive member. The adhesive member is stacked on a front surface of the thermal conductive sheet. An adhesive force of the adhesive member decreases along with a temperature rise.Type: ApplicationFiled: September 25, 2023Publication date: April 4, 2024Inventors: Youji SHIRATO, Norihiro KAWAMURA
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Publication number: 20230352365Abstract: A thermoconductive material includes a carbonaceous substance as a main component and has a plurality of screw insertion portions into which a plurality of screws are to be inserted on a one-to-one basis in a thickness direction defined with respect to the thermoconductive material. The thermoconductive material includes an inside region located at a side of a central portion of the thermoconductive material with respect to the plurality of screw insertion portions and an outside region located at a side of an outer edge portion of the thermoconductive material with respect to the inside region. The outside region includes a support portion which is at least part of the outside region. When a pressure of 500 kPa is applied in the thickness direction, an outside thickness which is a thickness of the support portion is greater than an inside thickness which is a greatest thickness of the inside region.Type: ApplicationFiled: September 10, 2021Publication date: November 2, 2023Inventors: Youji SHIRATO, Norihiro KAWAMURA, Masaya HATTORI
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Publication number: 20230247806Abstract: An electrical device according to the present disclosure includes a heat generator, a heat dissipator, a thermal conductive sheet, and a thermal conductive fluid. The heat generator has a first surface. The heat dissipator has a second surface that faces the first surface. The thermal conductive sheet and the thermal conductive fluid are both interposed between the first surface and the second surface. The first surface and the second surface face each other in their respective counter regions. Each of the counter regions includes a first region and a second region when viewed in a direction in which the first and second surfaces face each other. The first region holds the thermal conductive fluid but does not receive the thermal conductive sheet. The second region is adjacent to the first region and receives the thermal conductive sheet.Type: ApplicationFiled: January 19, 2023Publication date: August 3, 2023Inventors: Youji SHIRATO, Naoki SAITOU, Norihiro KAWAMURA
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Publication number: 20230032968Abstract: A graphite composite includes a graphite sheet having a void inside and a resin member. The void is partially filled by at least a part of the resin member in its entirety. The proportion of the resin member to the sum of the graphite sheet and the resin member is equal to or greater than 5% by mass. The graphite composite has a porosity equal to or greater than 50% by volume and equal to or less than 95% by volume.Type: ApplicationFiled: July 28, 2022Publication date: February 2, 2023Inventors: Youji Shirato, Norihiro Kawamura, Yoshifumi Ilmuro
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Publication number: 20220059431Abstract: An object of the present disclosure is to provide a heat conducting sheet that can be easily positioned and can absorb unevenness of a heat generating component and a heat radiating component to reduce thermal resistance, and an electronic device using the same. Heat conducting sheet includes rectangular graphite sheet and attachment sheet that covers graphite sheet, graphite sheet being exposed at least two opposite sides. Graphite sheet is exposed from between attachment sheets, a thickness of attachment sheet is made thinner than (T0-T1) where an initial thickness of graphite sheet is T0, and a thickness when a pressure of 100 kPa is applied to the graphite sheet is T1.Type: ApplicationFiled: January 15, 2020Publication date: February 24, 2022Inventors: AKIHITO KONISHI, NORIHIRO KAWAMURA, YOUJI SHIRATO, NAOKI SAITOU
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Patent number: 11109513Abstract: The present disclosure relates to a heat conductive sheet that includes a heat generation component having a large heat generation amount. The heat conductive sheet according to the present disclosure includes a heat radiation sheet having a graphite sheet, a first protective film provided on one surface side of the graphite sheet, and a second protective film provided on another surface side of the graphite sheet. The heat radiation sheet includes a bent part that is bent, and a first heat radiation part and a second heat radiation part that are coupled to each other through the bent part and overlapping with each other in a view from above. Further, a first non-adhesive area in which the first heat radiation part and the second heat radiation part are not adhered to each other is provided between the first heat radiation part and the second heat radiation part.Type: GrantFiled: January 12, 2018Date of Patent: August 31, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Norihiro Kawamura, Daishi Takahashi
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Patent number: 11040643Abstract: A heat insulating sheet includes, a first sheet, a first heat insulator disposed on a main surface of the first sheet and including a first xerogel, a second heat insulator disposed on the main surface of the first sheet apart from the first heat insulator and including a second xerogel, and a second sheet disposed on the main surface of the first sheet to cover the first and second heat insulators. A first region of the heat insulating sheet provided between the first and second heat insulators viewing in a direction perpendicular to the main surface has an extensible rate larger than an extensible rate of each of the first and second heat insulators. The heat insulating property of this heat insulating sheet hardly degrades.Type: GrantFiled: August 2, 2016Date of Patent: June 22, 2021Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Norihiro Kawamura, Kazuhiko Kubo, Yuuichi Abe, Takeshi Fujii
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Publication number: 20210050280Abstract: A highly reliable electronic device that efficiently dissipates generated heat and a method for manufacturing the electronic device are provided. The electronic device includes mount board, heat generating component mounted on mount board, pressing component provided above heat generating component, and film provided between heat generating component and pressing component. Further, liquid heat conductive material is provided between heat generating component and film and between pressing component and graphite-based carbonaceous film. Film contains graphite-based carbon and is compressed to predetermined compressibility by pressing component.Type: ApplicationFiled: May 13, 2019Publication date: February 18, 2021Inventors: AKIHITO KONISHI, RYOSUKE USUI, NORIHIRO KAWAMURA
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Patent number: 10868346Abstract: A composite sheet includes a thermally-conductive sheet, a first insulating sheet that covers one surface of the thermally-conductive sheet, and a second insulating sheet that covers another surface of the thermally-conductive sheet, and seals the thermally-conductive sheet between the first and second insulating sheets. The thermally-conductive sheet has a first through hole provided therein. The composite sheet has an insulating lamination portion at which the first insulating sheet is stacked on the second insulating sheet to seal an inner wall surface of the first through hole. The insulating lamination portion has a second through hole provided inside the first through hole and having a hole diameter which is smaller than a hole diameter of the first through hole.Type: GrantFiled: March 9, 2017Date of Patent: December 15, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yoshiya Sakaguchi, Norihiro Kawamura
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Publication number: 20200340612Abstract: The present disclosure is intended to provide a thermal insulation sheet that is resistant to being damaged even if enlarged in shape, as well as a multilayer thermal insulation sheet including such a thermal insulation sheet. The thermal insulation sheet includes a thermal insulator made of a nonwoven fabric that supports a xerogel in internal spaces. The thermal insulator has a plurality of through holes in an internal region in a plan view. Protective sheets are disposed on two respective surfaces of the thermal insulator. The protective sheets are joined together at a periphery of the thermal insulator and through inside the through holes.Type: ApplicationFiled: May 30, 2018Publication date: October 29, 2020Inventors: NORIHIRO KAWAMURA, CHIHIRO SATOU, RYOSUKE USUI
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Patent number: 10756314Abstract: A composite sheet includes a thermally-conductive sheet, a first insulating sheet that covers one surface of the thermally-conductive sheet; a second insulating sheet that covers another surface of the thermally-conductive sheet, and seals the thermally-conductive sheet between the first insulating sheet and the second insulating sheet, and a thermal insulation layer that is laminated between the thermally-conductive sheet and the first insulating sheet to cover at least a part of the thermally-conductive sheet.Type: GrantFiled: March 9, 2017Date of Patent: August 25, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yoshiya Sakaguchi, Norihiro Kawamura
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Publication number: 20190373775Abstract: The present disclosure relates to a heat conductive sheet that includes a heat generation component having a large heat generation amount. The heat conductive sheet according to the present disclosure includes a heat radiation sheet having a graphite sheet, a first protective film provided on one surface side of the graphite sheet, and a second protective film provided on another surface side of the graphite sheet. The heat radiation sheet includes a bent part that is bent, and a first heat radiation part and a second heat radiation part that are coupled to each other through the bent part and overlapping with each other in a view from above. Further, a first non-adhesive area in which the first heat radiation part and the second heat radiation part are not adhered to each other is provided between the first heat radiation part and the second heat radiation part.Type: ApplicationFiled: January 12, 2018Publication date: December 5, 2019Inventors: NORIHIRO KAWAMURA, DAISHI TAKAHASHI
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Publication number: 20190013556Abstract: A composite sheet includes a thermally-conductive sheet, a first insulating sheet that covers one surface of the thermally-conductive sheet, and a second insulating sheet that covers another surface of the thermally-conductive sheet, and seals the thermally-conductive sheet between the first and second insulating sheets. The thermally-conductive sheet has a first through hole provided therein. The composite sheet has an insulating lamination portion at which the first insulating sheet is stacked on the second insulating sheet to seal an inner wall surface of the first through hole. The insulating lamination portion has a second through hole provided inside the first through hole and having a hole diameter which is smaller than a hole diameter of the first through hole.Type: ApplicationFiled: March 9, 2017Publication date: January 10, 2019Inventors: YOSHIYA SAKAGUCHI, NORIHIRO KAWAMURA
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Publication number: 20190006642Abstract: A composite sheet includes a thermally-conductive sheet, a first insulating sheet that covers one surface of the thermally-conductive sheet; a second insulating sheet that covers another surface of the thermally-conductive sheet, and seals the thermally-conductive sheet between the first insulating sheet and the second insulating sheet, and a thermal insulation layer that is laminated between the thermally-conductive sheet and the first insulating sheet to cover at least a part of the thermally-conductive sheet.Type: ApplicationFiled: March 9, 2017Publication date: January 3, 2019Inventors: YOSHIYA SAKAGUCHI, NORIHIRO KAWAMURA
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Publication number: 20180134194Abstract: A heat insulating sheet includes, a first sheet, a first heat insulator disposed on a main surface of the first sheet and including a first xerogel, a second heat insulator disposed on the main surface of the first sheet apart from the first heat insulator and including a second xerogel, and a second sheet disposed on the main surface of the first sheet to cover the first and second heat insulators. A first region of the heat insulating sheet provided between the first and second heat insulators viewing in a direction perpendicular to the main surface has an extensible rate larger than an extensible rate of each of the first and second heat insulators. The heat insulating property of this heat insulating sheet hardly degrades.Type: ApplicationFiled: August 2, 2016Publication date: May 17, 2018Inventors: NORIHIRO KAWAMURA, KAZUHIKO KUBO, YUUICHI ABE, TAKESHI FUJII
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Patent number: 9488420Abstract: A heat conducting sheet includes a first sheet having heat conductivity, a bonding layer disposed on a part of a first face of the first sheet, and a backing separator disposed on the first face entirely. The backing separator has slight adhesion, so that the first sheet can stick to the backing separator. Bonding force between the first sheet and the bonding layer is greater than bonding force between the backing separator and the bonding layer.Type: GrantFiled: December 10, 2013Date of Patent: November 8, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Norihiro Kawamura, Takahiro Senshu, Kazuhiko Kubo, Keiji Kawajiri
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Patent number: 9475702Abstract: With a manufacturing method of a graphite sheet, a cavity-forming sheet having a mesh structure or a nonwoven fabric structure is firstly impregnated with polyamide acid and then molded into a sheet. The molded sheet is then heat treated to imidize polyamide acid so as to produce a polyimide sheet composed of polyimide and the cavity-forming sheet disposed in polyimide. The polyimide sheet is then fired in a non-oxidizing atmosphere to pyrolyze the polyimide so as to produce the graphite sheet. The cavity-forming sheet is made of material which maintains a shape thereof when the polyimide sheet is produced and which gasifies and loses at least 80% of its weight when the polyimide is pyrolyzed.Type: GrantFiled: March 5, 2013Date of Patent: October 25, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Tatsuhiro Ooshiro, Norihiro Kawamura
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Publication number: 20150086780Abstract: A heat conducting sheet includes a first sheet having heat conductivity, a bonding layer disposed on a part of a first face of the first sheet, and a backing separator disposed on the first face entirely. The backing separator has slight adhesion, so that the first sheet can stick to the backing separator. Bonding force between the first sheet and the bonding layer is greater than bonding force between the backing separator and the bonding layer.Type: ApplicationFiled: December 10, 2013Publication date: March 26, 2015Applicant: PANASONIC CORPORATIONInventors: Norihiro Kawamura, Takahiro Senshu, Kazuhiko Kubo, Keiji Kawajiri
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Publication number: 20140332993Abstract: With a manufacturing method of a graphite sheet, a cavity-forming sheet having a mesh structure or a nonwoven fabric structure is firstly impregnated with polyamide acid and then molded into a sheet. The molded sheet is then heat treated to imidize polyamide acid so as to produce a polyimide sheet composed of polyimide and the cavity-forming sheet disposed in polyimide. The polyimide sheet is then fired in a non-oxidizing atmosphere to pyrolyze the polyimide so as to produce the graphite sheet. The cavity-forming sheet is made of material which maintains a shape thereof when the polyimide sheet is produced and which gasifies and loses at least 80% of its weight when the polyimide is pyrolyzed.Type: ApplicationFiled: March 5, 2013Publication date: November 13, 2014Inventors: Tatsuhiro Ooshiro, Norihiro Kawamura
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Patent number: 8720537Abstract: A graphite sheet preventing leakage of a heat radiating member when a fluid heat radiating member such as grease is used and improving heat radiation performance is provided. A graphite sheet includes a first main surface and a second main surface opposite to the first main surface and has a large anisotropic thermal conductivity in a main surface direction. The graphite sheet includes a first concave portion provided on the first main surface and having a first bottom surface, a second concave portion provided on the second main surface and having a second bottom surface, a thin film portion formed in a region in which the first bottom surface and the second bottom surface are overlapped with each other, and a connecting hole penetrating the thin film portion and allowing the first concave portion and the second concave portion to communicate with each other.Type: GrantFiled: June 30, 2010Date of Patent: May 13, 2014Assignee: Panasonic CorporationInventors: Kazuhiko Kubo, Yuichi Sato, Norihiro Kawamura, Masashi Funaba