Patents by Inventor Emiko Igaki
Emiko Igaki 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: 9923182Abstract: An embodiment of the present disclosure provides a structure that contributes to increasing the capacity density. A secondary cell according to an embodiment of the present disclosure includes a plurality of periodic unit structures that are arranged on a first surface. Each of those periodic unit structures includes a positive electrode layer and a negative electrode layer, each of which projects away from the first surface, and a solid electrolyte interposed between the positive electrode and negative electrode layers.Type: GrantFiled: February 15, 2013Date of Patent: March 20, 2018Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Miyuki Nakai, Satoshi Shibata, Emiko Igaki, Hirofumi Fujita
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Publication number: 20150188131Abstract: An active material, for a lithium ion secondary battery, capable of suppressing deposition of lithium metal is provided. The active material for a lithium ion secondary battery has a composition represented by LiZnP(x)V(1-x)O4 (O<x<1) and having a redox potential that is higher than 0 V and lower than or equal to 1.5 V on a lithium metal basis.Type: ApplicationFiled: December 4, 2013Publication date: July 2, 2015Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Toshiro Kume, Takashi Kouzaki, Satoru Ohuchi, Kazuko Asano, Yuta Sugimoto, Emiko Igaki
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Publication number: 20140113180Abstract: An embodiment of the present disclosure provides a structure that contributes to increasing the capacity density. A secondary cell according to an embodiment of the present disclosure includes a plurality of periodic unit structures that are arranged on a first surface. Each of those periodic unit structures includes a positive electrode layer and a negative electrode layer, each of which projects away from the first surface, and a solid electrolyte interposed between the positive electrode and negative electrode layers.Type: ApplicationFiled: February 15, 2013Publication date: April 24, 2014Applicant: Panasonic CorporationInventors: Miyuki Nakai, Satoshi Shibata, Emiko Igaki, Hirofumi Fujita
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Patent number: 7794883Abstract: A nonaqueous electrolyte secondary battery of the present invention includes a nonaqueous electrolyte and a positive electrode 13 that occludes lithium ions reversibly. The positive electrode 13 includes active material layers 13b and a sheet-like collector 13a that supports the active material layers 13b. The collector 13a contains aluminum and at least one element other than aluminum. The average composition that is obtained by averaging the ratio of the elements composing the collector 13a in the direction of the thickness of the collector 13a is equal to the composition of an alloy whose liquidus temperature is 630° C. or lower. The present invention makes it possible to prevent heat from being generated due to an internal short circuit in the nonaqueous electrolyte secondary battery.Type: GrantFiled: February 8, 2005Date of Patent: September 14, 2010Assignee: Panasonic CorporationInventors: Naoki Matsumura, Emiko Igaki, Motoi Kawamura, Masashi Shoji, Miyuki Nakai
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Patent number: 7541733Abstract: A light-emitting element of the present invention, includes: a porous light-emitting body including an insulator having a void and an inorganic phosphor particle; and at least two electrodes provided so as to contact with a surface of the light-emitting body. A voltage is applied to the at least two electrodes so as to generate discharge, and the light-emitting body is pumped by the discharge so as to emit light. Thereby, a light-emitting element that is reduced in a deterioration of brightness and a degradation of reliability of phosphors and does not require the vacuum encapsulation and the application of a high voltage, which are required for glow discharge, and still-higher level of thin-film technology can be provided. By arranging these light-emitting elements two-dimensionally in a matrix form, a flat display device with a simple configuration can be provided at a low cost.Type: GrantFiled: August 1, 2003Date of Patent: June 2, 2009Assignee: Panasonic CorporationInventors: Iwao Ueno, Masakazu Tanahashi, Emiko Igaki
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Publication number: 20080248385Abstract: A nonaqueous electrolyte secondary battery of the present invention includes a nonaqueous electrolyte and a positive electrode 13 that occludes lithium ions reversibly. The positive electrode 13 includes active material layers 13b and a sheet-like collector 13a that supports the active material layers 13b. The collector 13a contains aluminum and at least one element other than aluminum. The average composition that is obtained by averaging the ratio of the elements composing the collector 13a in the direction of the thickness of the collector 13a is equal to the composition of an alloy whose liquidus temperature is 630° C. or lower. The present invention makes it possible to prevent heat from being generated due to an internal short circuit in the nonaqueous electrolyte secondary battery.Type: ApplicationFiled: February 8, 2005Publication date: October 9, 2008Applicant: Matsushita Electric Industrial., Ltd.Inventors: Naoki Matsumura, Emiko Igaki, Motoi Kawamura, Masashi Shoji, Miyuki Nakai
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Patent number: 7424771Abstract: A method of preparing a composite sheet unit includes arranging a plurality of sintered piezoelectric thin wires in a uniform direction on a surface of a resin layer is prepared. A plurality of the same are laminated and integrated so that the sintered piezoelectric thin wires are positioned between the resin layers. Here, a curing resin may be impregnated therein so as to form resin-impregnated-cured portions. Then, the lamination is cut in a direction crossing a lengthwise direction of the sintered piezoelectric thin wires, so that a piezocomposite is obtained. Cut surfaces may be ground. By so doing, it is possible to provide a highly reliable piezocomposite having a fine structure at low cost, and to provide an ultrasonic probe for ultrasonic diagnostic equipment, as well as ultrasonic diagnostic equipment using the same.Type: GrantFiled: January 24, 2005Date of Patent: September 16, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Seigo Shiraishi, Norihisa Takahara, Emiko Igaki, Hidetomo Nagahara, Koetsu Saito
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Patent number: 7239147Abstract: A method for testing a precursor of a secondary cell with high reliability and high efficiency to judge the precursor to be acceptable or defective. The current flowing when a test voltage is applied between a pair of electrodes is measured before an electrolyte is placed between the electrodes. If a current the current value of which exceeds a predetermined reference current value (13) is detected during the time from the start of application of a voltage to a normal secondary cell precursor until the current becomes constant, the precursor is determined to be defective.Type: GrantFiled: August 14, 2003Date of Patent: July 3, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Toshiro Kume, Masashi Shoji, Emiko Igaki, Shuji Tsutsumi, Mikinari Shimada, Masakazu Tanahashi, Akira Takahashi, Shouichi Imashuku
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Publication number: 20060240593Abstract: In the present invention, a capacitor element including a valve action metal, an oxide film layer formed on the surface of the valve action metal, and a solid electrolytic layer formed on the oxide film layer is provided with an organic compound having a boiling point of not lower than 150° C. and a melting point of not higher than 150° C., and the capacitor element including the organic compound is arranged inside a package. The oxide film is repaired with the organic compound as a solvent by an application of a dc voltage.Type: ApplicationFiled: June 21, 2006Publication date: October 26, 2006Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTDInventors: Emiko Igaki, Seigo Shiraishi, Masakazu Tanahashi, Sachiko Nobori, Hisataka Katoh
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Patent number: 7049679Abstract: A solid electrolytic capacitor is obtained in which a sintered metal serves as an anode and a silver layer serves as a cathode. A surface of sintered metal made of tantalum or the like and having an open porosity ratio of more than 75% is oxidized so that an oxide film made of tantalum pentoxide or the like is deposited thereon. Cavities of the metal are filled with an electrically conductive material. Then, the metal is wound around a lead wire and made into a desired shape and size. The silver layer is formed on this porous metal body. Because a specific surface area of the sintered metal is large, a large capacity is obtained.Type: GrantFiled: November 1, 2002Date of Patent: May 23, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Atsuo Nagai, Hideki Kuramitsu, Emiko Igaki, Koichi Kojima
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Patent number: 6989289Abstract: The present invention provides an electrolytic capacitor having a large capacitance sufficiently close to its design capacitance, and a method of easily producing such an electrolytic capacitor wherein a cathode-side conductive polymer layer of an electrolyzing electrode is formed on at least one side surface of an anode valve metal foil having through holes 20 and a coarsened surface, electrolysis is carried out in a conductive monomer solution, with the polymer layer used as the anode, and an electrolytically-formed conductive polymer layer is formed on the surface of the dielectric oxide film of the valve metal foil, thereby obtaining an electrolytic capacitor, whereby it is possible to easily obtain an electrolytic capacitor having a large capacitance sufficiently close to its design capacitance.Type: GrantFiled: August 4, 2000Date of Patent: January 24, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Seigo Shiraishi, Emiko Igaki, Masakazu Tanahashi
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Publication number: 20060014049Abstract: A ceramic green sheet is obtained by forming a ceramic coating containing at least a ceramic raw material powder, a binder, and an organic solvent in a sheet shape, followed by drying. The binder contains two or more kinds of polyvinyl acetal with different average degrees of polymerization, and polyvinyl acetal with a higher average degree of polymerization contains a relatively large amount of hydroxyl group, and polyvinyl acetal with a lower average degree of polymerization contains a relatively small amount of hydroxyl group. This green sheet is subjected to binder-removal and firing, thereby obtaining a ceramic capacitor in which inner electrode layers 2 and dielectric layers 1 are laminated alternately and external electrodes 3 are sintered at both ends of the laminate.Type: ApplicationFiled: May 17, 2004Publication date: January 19, 2006Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTDInventors: Tsuyoshi Ichinose, Emiko Igaki, Kazuhiro Komatsu, Masayuki Tanahashi
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Publication number: 20050242820Abstract: A method for testing a precursor of a secondary cell with high reliability and high efficiency to judge the precursor to be acceptable or defective. The current flowing when a test voltage is applied between a pair of electrodes is measured before an electrolyte is placed between the electrodes. If a current the current value of which exceeds a predetermined reference current value (13) is detected during the time from the start of application of a voltage to a normal secondary cell precursor until the current becomes constant, the precursor is determined to be defective.Type: ApplicationFiled: August 14, 2003Publication date: November 3, 2005Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Toshiro Kume, Masashi Shoji, Emiko Igaki, Shuji Tsutsumi, Mikinari Shimada, Masakazu Tanahashi, Akira Takahashi, Shouichi Imashuku
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Publication number: 20050174037Abstract: A light-emitting element of the present invention, includes: a porous light-emitting body including an insulator having a void and an inorganic phosphor particle; and at least two electrodes provided so as to contact with a surface of the light-emitting body. A voltage is applied to the at least two electrodes so as to generate discharge, and the light-emitting body is pumped by the discharge so as to emit light. Thereby, a light-emitting element that is reduced in a deterioration of brightness and a degradation of reliability of phosphors and does not require the vacuum encapsulation and the application of a high voltage, which are required for glow discharge, and still-higher level of thin-film technology can be provided. By arranging these light-emitting elements two-dimensionally in a matrix form, a flat display device with a simple configuration can be provided at a low cost.Type: ApplicationFiled: August 1, 2003Publication date: August 11, 2005Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Iwao Ueno, Masakazu Tanahashi, Emiko Igaki
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Publication number: 20050156490Abstract: A composite sheet unit in which a plurality of sintered piezoelectric thin wires are arranged in a uniform direction on a surface of a resin layer is prepared, and a plurality of the same are laminated and integrated so that the sintered piezoelectric thin wires are positioned between the resin layers. Here, a curing resin may be impregnated therein so as to form resin-impregnated-cured portions. Then, the lamination is cut in a direction crossing a lengthwise direction of the sintered piezoelectric thin wires, so that a piezocomposite is obtained. Cut surfaces may be ground. By so doing, it is possible to provide a highly reliable piezocomposite having a fine structure at low cost, and to provide an ultrasonic probe for ultrasonic diagnostic equipment, as well as ultrasonic diagnostic equipment using the same.Type: ApplicationFiled: January 24, 2005Publication date: July 21, 2005Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Seigo Shiraishi, Norihisa Takahara, Emiko Igaki, Hidetomo Nagahara, Koetsu Saito
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Publication number: 20050142447Abstract: A negative electrode for a lithium secondary battery capable of storing and releasing lithium reversibly includes a collector, and a negative electrode material layer arranged on the collector. The negative electrode material layer contains a thin-film negative electrode material capable of storing and releasing lithium reversibly, and lithium non-storing portions containing a lithium non-storing material are arranged on at least one selected from the group consisting of a surface and an inside of the negative electrode material layer. In this way, a negative electrode for a lithium secondary battery capable of suppressing the deformation accompanying charging and discharging is provided.Type: ApplicationFiled: December 23, 2004Publication date: June 30, 2005Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Miyuki Nakai, Emiko Igaki, Masashi Shoji
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Patent number: 6876537Abstract: A ceramic electronic component includes two or more electrodes 5 and 6 spaced at a predetermined distance from each other, between which a potential difference is produced in operation and a void 9 that penetrates to the outside is provided. In the void 9, a water repellent film 10 is formed. This prevents water vapor from being absorbed in the void 9 connecting the electrodes 5 and 6, and thereby preventing the formation of a conductive path and the occurrence of ion migration.Type: GrantFiled: August 13, 2003Date of Patent: April 5, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Norihisa Takahara, Emiko Igaki, Masakazu Tanahashi, Takafumi Moriyasu, Rui Nakao, Tomoyuki Washizaki, Yoshiaki Fukui
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Patent number: 6873090Abstract: A composite sheet unit in which a plurality of sintered piezoelectric thin wires are arranged in a uniform direction on a surface of a resin layer is prepared, and a plurality of the same are laminated and integrated so that the sintered piezoelectric thin wires are positioned between the resin layers. Here, a curing resin may be impregnated therein so as to form resin-impregnated-cured portions. Then, the lamination is cut in a direction crossing a lengthwise direction of the sintered piezoelectric thin wires, so that a piezocomposite is obtained. Cut surfaces may be ground. By so doing, it is possible to provide a highly reliable piezocomposite having a fine structure at low cost, and to provide an ultrasonic probe for ultrasonic diagnostic equipment, as well as ultrasonic diagnostic equipment using the same.Type: GrantFiled: January 22, 2002Date of Patent: March 29, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Seigo Shiraishi, Norihisa Takahara, Emiko Igaki, Hidetomo Nagahara, Koetsu Saito
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Publication number: 20050064291Abstract: A negative electrode for a non-aqueous electrolyte secondary battery including a current collector, and an electrode material layer including an electrode material capable of reversibly absorbing and desorbing Li ions is provided. The electrode material includes at least one element selected from the group consisting of Si, Sn and Al; the surface of the current collector is provided with protrusions; the electrode material layer is disposed on the surfaces of the current collector and the protrusions; and the protrusion has a portion facing the surface of the current collector other than a portion that is brought into contact with the current collector. Thus, a negative electrode for a non-aqueous electrolyte battery having high properties such as an energy density, charging/discharging cycle property, and the like, and a non-aqueous electrolyte secondary battery can be provided.Type: ApplicationFiled: September 2, 2004Publication date: March 24, 2005Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Toshitada Sato, Miyuki Nakai, Emiko Igaki, Yasuhiko Bito
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Publication number: 20050048367Abstract: A non-aqueous electrolyte secondary battery of the present invention includes a positive electrode including a layer of active material particles, a negative electrode including a layer of active material particles and a non-aqueous electrolyte. An organic film including a conductive agent and having a low affinity to the non-aqueous electrolyte is formed on a portion of at least one electrode selected from the positive electrode and the negative electrode. Accordingly, there are provided a non-aqueous electrolyte secondary battery that exhibits a small decrease in capacity during repeated charge/discharge, a method for producing the same and an electrode material for an electrolyte battery.Type: ApplicationFiled: July 29, 2004Publication date: March 3, 2005Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Emiko Igaki, Masakazu Tanahashi, Miyuki Nakai