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: 6538363Abstract: A piezoelectric composite is formed from a piezoelectric precursor prepared by mixing a powder containing piezoelectric material with a binder material and a gap forming material filling a gap formed to the piezoelectric precursor. The gap forming material is then removed from the thus formed piezoelectric composite, thereby forming a piezoelectric element.Type: GrantFiled: September 28, 2001Date of Patent: March 25, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hidetomo Nagahara, Toshiharu Sato, Akihisa Adachi, Kiyohide Amemiya, Kazuhide Shioya, Emiko Igaki, Masakazu Tanahashi
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Patent number: 6522237Abstract: An electrode for a PTC thermistor of the present invention includes a base layer having electrical conductivity and a sintered layer formed on the base layer. The sintered layer is formed by sintering a conductive powder and has electrical conductivity, and has roughness on a surface thereof. Thus, the present invention can provide an electrode for a PTC thermistor that has a large adhesion to the conductive polymer and can be produced easily.Type: GrantFiled: October 29, 1999Date of Patent: February 18, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masahiko Ito, Masakazu Tanahashi, Toshiro Kume, Kouichi Morimoto, Junji Kojima, Emiko Igaki
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Publication number: 20030016486Abstract: 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: ApplicationFiled: July 11, 2002Publication date: January 23, 2003Inventors: Norihisa Takahara, Emiko Igaki, Masakazu Tanahashi, Takafumi Moriyasu, Rui Nakao, Tomoyuki Washizaki, Yoshiaki Fukui
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Patent number: 6507480Abstract: An electric double layer capacitor of the present invention having a capacitor element and an electrolyte arranged in a case sealed with a sealer, and further includes in the case a solid buffer for suppressing fluctuation in pH of the electrolyte. The solid buffer includes a compound selected from an oxide and a hydroxide. An element contained in the compound is at least one selected from the group consisting of Be, Al, Si, Sc, V, Cr, Fe, Ni, Cu, Zn, Ga, Ge, Y, Zr, Mo, Ag, Cd, In, Te, La, Ce, Pr, Nd, Pm, Gd, Dy, Ho, Er, Tm, Lu, W and Pb.Type: GrantFiled: February 22, 2002Date of Patent: January 14, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Susumu Nomoto, Masakazu Tanahashi, Mikinari Shimada, Emiko Igaki
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Patent number: 6479763Abstract: A conductive paste containing: conductive particles; foamable material which foams at the time of heating or decompression; and resin; characterized in that even after foaming of the foamable material, conductivity is maintained.Type: GrantFiled: April 28, 2000Date of Patent: November 12, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Emiko Igaki, Masakazu Tanahashi, Takeshi Suzuki
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Publication number: 20020159222Abstract: An electric double layer capacitor of the present invention comprises a capacitor element and an electrolyte arranged in a case sealed with a sealer, and further comprises in the case a solid buffer for suppressing fluctuation in pH of the electrolyte. The solid buffer includes a compound selected from an oxide and a hydroxide. An element contained in the compound is at least one selected from the group consisting of Be, Al, Si, Sc, V, Cr, Fe, Ni, Cu, Zn, Ga, Ge, Y, Zr, Mo, Ag, Cd, In, Te, La, Ce, Pr, Nd, Pm, Gd, Dy, Ho, Er, Tm, Lu, W and Pb.Type: ApplicationFiled: February 22, 2002Publication date: October 31, 2002Applicant: Matsushita Electric Industrial Co. Ltd.Inventors: Susumu Nomoto, Masakazu Tanahashi, Mikinari Shimada, Emiko Igaki
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Patent number: 6468448Abstract: A pH adjusting agent is added to a conductive adhesive to prevent the dissolution of a conductive particle to improve the reliability of a mounting structure, wherein when a pH environment is produced in which the conductive particle is easy to dissolve in the surrounding of the conductive adhesive, the pH adjusting agent can change the pH environment to a pH environment in which the conductive particle is resistant to dissolving.Type: GrantFiled: October 19, 2000Date of Patent: October 22, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazuyoshi Amami, Emiko Igaki, Minehiro Itagaki
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Publication number: 20020149903Abstract: There is provided a solid electrolytic capacitor including an anode body formed of a valve-action metal with a dielectric oxide coating layer formed on its surface, a cathode body, and an electroconductive polymer layer disposed between the anode body and the cathode body. The electroconductive polymer layer contains a softener for softening the electroconductive polymer layer, so that a solid electrolytic capacitor is provided that has small variations in characteristics, a lower equivalent series resistance (ESR), and an excellent high frequency property. In addition, when the anode and cathode of a solid electrolytic capacitor including an electroconductive polymer as a solid electrolyte are joined to each other, a lower ESR can be obtained under a lower pressure, and the electroconductive polymer layer can be prevented from being peeled off.Type: ApplicationFiled: June 3, 2002Publication date: October 17, 2002Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Masashi Shoji, Seigo Shiraishi, Emiko Igaki, Masakazu Tanahashi, Mikinari Shimada
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Publication number: 20020140780Abstract: An ink-jet recording head has nozzles capable of independent ejection and being arranged in high density, in which strength is high, fabricating yield is high, a cost is reduced, ejection efficiency is high, and ejection repeating frequency is high. In this ink-jet recording head, there are two-dimensionally arranged units, in each of which an ink pressure chamber, a partition wall serving as a driving portion, a pressure buffer chamber and a fixed wall are arranged in the same direction.Type: ApplicationFiled: December 23, 1999Publication date: October 3, 2002Inventors: EMIKO IGAKI, TORU ISHIDA, MASAKAZU TANAHASHI, HIDETOMO NAGAHARA, KIYOHIDE AMEMIYA, MASAHIKO HASHIMOTO, MASAYOSHI MIURA, MASAYOSHI MIURA
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Publication number: 20020130590Abstract: 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 22, 2002Publication date: September 19, 2002Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Seigo Shiraishi, Norihisa Takahara, Emiko Igaki, Hidetomo Nagahara, Koetsu Saito
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Patent number: 6452784Abstract: An aluminum electrolytic capacitor includes a case, a sealant for sealing the case, a separator, a cathode, an anode, and an electrolyte sealed in the case, and an anode lead connected to the anode, wherein the cathode includes an aluminum foil, and a solid compound having a function of keeping the pH of the electrolyte constant further is provided in the case.Type: GrantFiled: May 25, 2001Date of Patent: September 17, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasuhiko Nakada, Masakazu Tanahashi, Emiko Igaki, Mikinari Shimada
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Patent number: 6426866Abstract: There is provided a solid electrolytic capacitor including an anode body formed of a valve-action metal with a dielectric oxide coating layer formed on its surface, a cathode body, and an electroconductive polymer layer disposed between the anode body and the cathode body. The electroconductive polymer layer contains a softener for softening the electroconductive polymer layer, so that a solid electrolytic capacitor is provided that has small variations in characteristics, a lower equivalent series resistance (ESR), and an excellent high frequency property. In addition, when the anode and cathode of a solid electrolytic capacitor including an electroconductive polymer as a solid electrolyte are joined to each other, a lower ESR can be obtained under a lower pressure, and the electroconductive polymer layer can be prevented from being peeled off.Type: GrantFiled: April 9, 2001Date of Patent: July 30, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masashi Shoji, Seigo Shiraishi, Emiko Igaki, Masakazu Tanahashi, Mikinari Shimada
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Patent number: 6413282Abstract: The invention has an object to reduce the impedance and to improve the responsiveness at high frequencies in an electrolytic capacitor having an conducting polymer layer as the cathode. A cathode current collector is directly joined with the surface of the dielectric of a valvular metal porous body for anode using an conducting polymer layer but not through various binding layers (for example, a carbon layer and a silver layer) thereby reducing the impedance. A cathode current collector is disposed adjacent and opposite to a porous valvular metal foil for anode. This structure ensures that the collecting area is enlarged. In this case, a cathode current collector may be directly joined with the surface of the dielectric of a valvular metal porous body for anode using an conducting polymer layer but not through various binding layers thereby reducing the total impedance.Type: GrantFiled: November 15, 1999Date of Patent: July 2, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masakazu Tanahashi, Emiko Igaki
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Patent number: 6400554Abstract: The present invention provides an electrolytic capacitor and its anode body using a laminate of plurality of sheets of valve metal foil, exhibiting excellent high-frequency response and lower inner impedance as a electrolytic capacitor. The anode body for a electrolytic capacitor includes; a laminate of plurality of rectangular anode valve metal foil each which has dielectric layers of its metal oxide film anodized on roughened surfaces of each anode valve metal foil; and a fixing frame to clamp the laminate in the laminating direction to fix the laminate and connect electrically with anode layers of the laminated foil. Such an anode body may be used to be filled in the liquid electrolyte in the container to make a capacitor.Type: GrantFiled: June 18, 1999Date of Patent: June 4, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Seigo Shiraishi, Emiko Igaki, Masakazu Tanahashi
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Patent number: 6392869Abstract: A solid electrolytic capacitor capable of realizing miniaturization and large capacitance and obtaining the connection, in particular electric connection between the anodes, with low resistance and high reliability. A solid electrolytic capacitor includes: a laminate including a plurality of capacitor units in which a dielectric layer and a solid electrolytic layer are laminated in this order on a predetermined surface of an anode made of a valve metal; a sealing body for sealing the laminate; and an anodic conductive elastic body formed outside the sealing body and electrically connected to the anode. The anodes are adhered to each other via the conductive elastic body. In the solid electrolytic capacitor, a part of the anode is exposed to the outside of the sealing portion and the exposed portion is covered with a plating layer, and electrically connected to the anodic conductive elastic body via the covered exposed portion.Type: GrantFiled: May 23, 2001Date of Patent: May 21, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Seigo Shiraishi, Emiko Igaki, Masakazu Tanahashi, Mikinari Shimada, Norihisa Takahara, Yasuhiko Nakada, Keizou Nakagawa, Hideki Masumi, Eiji Yamashita
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Publication number: 20020036447Abstract: A piezoelectric composite is formed from a piezoelectric precursor prepared by mixing a powder containing piezoelectric material with a binder material and a gap forming material filling a gap formed to the piezoelectric precursor. The gap forming material is then removed from the thus formed piezoelectric composite, thereby forming a piezoelectric element.Type: ApplicationFiled: September 28, 2001Publication date: March 28, 2002Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Hidetomo Nagahara, Toshiharu Sato, Akihisa Adachi, Kiyohide Amemiya, Kazuhide Shioya, Emiko Igaki, Masakazu Tanahashi
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Patent number: 6361572Abstract: Disclosed is a method of making an electrolytic capacitor including the steps of forming a cathode by depositing a homogeneous and densified conducting polymer on a dielectric layer of a valvular metal porous anode. The conducting polymer is formed of two layers by chemical oxidation polymerization. The first conductive polymer layer is formed in the pretreatment step using a solution excluding an organic acid-type dopant, the polymer is efficiently formed on the inner surface of the pores of the anode and the second conductive polymer layer is formed in the primary treatment step on the first conductive polymer layer, using a solution containing an organic acid-type dopant. The resultant capacitor obtains a high capacitance, a low impedance, and a high responsiveness at high frequencies.Type: GrantFiled: July 14, 2000Date of Patent: March 26, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Emiko Igaki, Masakazu Tanahashi, Chiharu Hayashi
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Publication number: 20020011919Abstract: An electrode for a PTC thermistor of the present invention includes a base layer having electrical conductivity and a sintered layer formed on the base layer. The sintered layer is formed by sintering a conductive powder and has electrical conductivity, and has roughness on a surface thereof. Thus, the present invention can provide an electrode for a PTC thermistor that has a large adhesion to the conductive polymer and can be produced easily.Type: ApplicationFiled: February 5, 2001Publication date: January 31, 2002Applicant: Matsushita Electric Industrial Co. Ltd.Inventors: Masahiro Ito, Masakazu Tanahashi, Toshiro Kume, Kouichi Morimoto, Junji Kojima, Emiko Igaki
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Publication number: 20020001169Abstract: A solid electrolytic capacitor capable of realizing miniaturization and large capacitance and obtaining the connection, in particular electric connection between the anodes, with low resistance and high reliability. A solid electrolytic capacitor includes: a laminate including a plurality of capacitor units in which a dielectric layer and a solid electrolytic layer are laminated in this order on a predetermined surface of an anode made of a valve metal; a sealing body for sealing the laminate; and an anodic conductive elastic body formed outside the sealing body and electrically connected to the anode. The anodes are adhered to each other via the conductive elastic body. In the solid electrolytic capacitor, a part of the anode is exposed to the outside of the sealing portion and the exposed portion is covered with a plating layer, and electrically connected to the anodic conductive elastic body via the covered exposed portion.Type: ApplicationFiled: May 23, 2001Publication date: January 3, 2002Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Seigo Shiraishi, Emiko Igaki, Masakazu Tanahashi, Mikinari Shimada, Norihisa Takahara, Yasuhiko Nakada, Keizou Nakagawa, Hideki Masumi, Eiji Yamashita
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Publication number: 20010048583Abstract: An aluminum electrolytic capacitor includes a case, a sealant for sealing the case, a separator, a cathode, an anode, and an electrolyte sealed in the case, and an anode lead connected to the anode, wherein the cathode includes an aluminum foil, and a solid compound having a function of keeping the pH of the electrolyte constant further is provided in the case.Type: ApplicationFiled: May 25, 2001Publication date: December 6, 2001Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Yasuhiko Nakada, Masakazu Tanahashi, Emiko Igaki, Mikinari Shimada