Patents by Inventor Seiichirou Hirahara
Seiichirou Hirahara 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: 20230373226Abstract: A thermal head includes a substrate, electrodes, and a resistor layer. The electrodes are located on the substrate and extend along a first direction of the substrate in a plan view. The resistor layer is located on the substrate and on the electrode. The electrodes include a first electrode and a second electrode arranged at a predetermined interval in a second direction intersecting the first direction. In at least one of the first electrode and the second electrode, a central portion in the second direction protrudes out farther than an end portion in the second direction on the upper surface located below the resistor layer.Type: ApplicationFiled: September 28, 2021Publication date: November 23, 2023Inventors: Yasuhiro KYUNAI, Seiichirou HIRAHARA, Tomoki YAMASHITA, Tatsuya KITAHARA
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Patent number: 10115534Abstract: The disclosure relates to an all-solid-state capacitor which has a high capacitance, is excellent in frequency characteristics, and can be made compact. An all-solid-state capacitor of the disclosure includes an inorganic solid electrolyte, and a pair of current collectors disposed so as to hold the inorganic solid electrolyte in between, the inorganic solid electrolyte having a main crystal phase of perovskite crystal structure that is expressed by a general formula, ABO3. A-site elements include two different elements, namely Li and M which is at least one of elements in Group 2 of the Periodic Table of Elements, and B-site elements include two different elements, namely Ti and M? which is at least one of elements in Group 5 of the Periodic Table of Elements.Type: GrantFiled: September 29, 2014Date of Patent: October 30, 2018Assignees: KYOCERA CORPORATION, ENERGY STORAGE MATERIALS LLC.Inventors: Tomoyuki Ono, Seiichirou Hirahara, Fumito Furuuchi, Maiko Nagayoshi, Youji Seki, Takaaki Tsurumi
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Patent number: 9916937Abstract: All-solid-state capacitor includes an inorganic solid electrolyte, and a pair of current collectors disposed so that the inorganic solid electrolyte is interposed therebetween. In the all-solid-state capacitor, the inorganic solid electrolyte has a polycrystalline structure composed of crystal particles and crystal grain boundaries formed between the crystal particles. In a first crystal particle included in the crystal particles, a domain located near the crystal grain boundaries is larger in size than a domain located near the center.Type: GrantFiled: September 29, 2014Date of Patent: March 13, 2018Assignee: KYOCERA CorporationInventors: Seiichirou Hirahara, Tomoyuki Ono, Fumito Furuuchi, Maiko Nagayoshi, Youji Seki, Shuichi Kasai, Takaaki Tsurumi
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Patent number: 9809499Abstract: A dielectric material having a rutile crystalline structure includes Ti as a major constituent metal element, and, as metal elements other than Ti, a metal element M1 which includes at least one selected from among Ni, Co, and elements belonging to Group 2 according to a periodic table, and a metal element M2 which includes at least one selected from among elements belonging to Group 5 and Group 6 in the periodic table, and, on a basis of a total amount of Ti, the metal element M1, and the metal element M2, a molar ratio x of the metal element M1 is in a range of 0.005 to 0.025 and a molar ratio y of the metal element M2 is in a range of 0.010 to 0.050.Type: GrantFiled: July 3, 2015Date of Patent: November 7, 2017Assignee: KYOCERA CORPORATIONInventors: Seiichirou Hirahara, Youji Seki, Tomoyuki Ono, Fumito Furuuchi, Maiko Nagayoshi
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Patent number: 9627148Abstract: An all-solid-state capacitor includes an inorganic solid electrolyte; and a pair of current collectors disposed so as to hold it in between. The inorganic solid electrolyte has a polycrystalline structure, and the all-solid-state capacitor satisfies a relationship given as: R1<R2<R3, a relationship given as: C1<C3, and a relationship given as: C1<C2 in which, R1, R2 and R3 are resistance components, and R1 denotes an intragrain resistance of the inorganic solid electrolyte, R2 denotes a grain-boundary resistance of the inorganic solid electrolyte and R3 denotes an interfacial resistance between the inorganic solid electrolyte and the current collector, and, C1, C2 and C3 are capacitance components, and C1 denotes an intragrain capacity of the inorganic solid electrolyte, C2 denotes a grain-boundary capacity of the inorganic solid electrolyte and C3 denotes an interfacial capacity between the inorganic solid electrolyte and the current collector.Type: GrantFiled: March 3, 2014Date of Patent: April 18, 2017Assignee: KYOCERA CORPORATIONInventors: Tomoyuki Ono, Seiichirou Hirahara, Takashi Oto, Youji Seki, Maiko Nagayoshi
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Publication number: 20170101344Abstract: A dielectric material having a rutile crystalline structure includes Ti as a major constituent metal element, and, as metal elements other than Ti, a metal element M1 which includes at least one selected from among Ni, Co, and elements belonging to Group 2 according to a periodic table, and a metal element M2 which includes at least one selected from among elements belonging to Group 5 and Group 6 in the periodic table, and, on a basis of a total amount of Ti, the metal element M1, and the metal element M2, a molar ratio x of the metal element M1 is in a range of 0.005 to 0.025 and a molar ratio y of the metal element M2 is in a range of 0.010 to 0.050.Type: ApplicationFiled: July 3, 2015Publication date: April 13, 2017Applicant: KYOCERA CorporationInventors: Seiichirou HIRAHARA, Youji SEKI, Tomoyuki ONO, Fumito FURUUCHI, Maiko NAGAYOSHI
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Publication number: 20160247635Abstract: All-solid-state capacitor includes an inorganic solid electrolyte, and a pair of current collectors disposed so that the inorganic solid electrolyte is interposed therebetween. In the all-solid-state capacitor, the inorganic solid electrolyte has a polycrystalline structure composed of crystal particles and crystal grain boundaries formed between the crystal particles. In a first crystal particle included in the crystal particles, a domain located near the crystal grain boundaries is larger in size than a domain located near the center.Type: ApplicationFiled: September 29, 2014Publication date: August 25, 2016Applicants: KYOCERA Corporation, ENERGY STORAGE MATERIALS LLC.Inventors: Seiichirou HIRAHARA, Tomoyuki ONO, Fumito FURUUCHI, Maiko NAGAYOSHI, Youji SEKI, Shuichi KASAI, Takaaki TSURUMI
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Publication number: 20160233032Abstract: The disclosure relates to an all-solid-state capacitor which has a high capacitance, is excellent in frequency characteristics, and can be made compact. An all-solid-state capacitor of the disclosure includes an inorganic solid electrolyte, and a pair of current collectors disposed so as to hold the inorganic solid electrolyte in between, the inorganic solid electrolyte having a main crystal phase of perovskite crystal structure that is expressed by a general formula, ABO3. A-site elements include two different elements, namely Li and M which is at least one of elements in Group 2 of the Periodic Table of Elements, and B-site elements include two different elements, namely Ti and M? which is at least one of elements in Group 5 of the Periodic Table of Elements.Type: ApplicationFiled: September 29, 2014Publication date: August 11, 2016Applicants: KYOCERA Corporation, ENERGY STORAGE MATERIALS LLC.Inventors: Tomoyuki ONO, Seiichirou HIRAHARA, Fumito FURUUCHI, Maiko NAGAYOSHI, Youji SEKI, Takaaki TSURUMI
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Publication number: 20160020037Abstract: An all-solid-state capacitor includes an inorganic solid electrolyte; and a pair of current collectors disposed so as to hold it in between. The inorganic solid electrolyte has a polycrystalline structure, and the all-solid-state capacitor satisfies a relationship given as: R1<R2<R3, a relationship given as: C1<C3, and a relationship given as: C1<C2 in which, R1, R2 and R3 are resistance components, and R1 denotes an intragrain resistance of the inorganic solid electrolyte, R2 denotes a grain-boundary resistance of the inorganic solid electrolyte and R3 denotes an interfacial resistance between the inorganic solid electrolyte and the current collector, and, C1, C2 and C3 are capacitance components, and C1 denotes an intragrain capacity of the inorganic solid electrolyte, C2 denotes a grain-boundary capacity of the inorganic solid electrolyte and C3 denotes an interfacial capacity between the inorganic solid electrolyte and the current collector.Type: ApplicationFiled: March 3, 2014Publication date: January 21, 2016Applicant: KYOCERA CorporationInventors: Tomoyuki ONO, Seiichirou HIRAHARA, Takashi OTO, Youji SEKI, Maiko NAGAYOSHI
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Publication number: 20130127568Abstract: A dielectric ceramic includes a main crystal phase containing Ba, Nd and Ti; and a remainder, part of Ti contained in the main crystal phase being substituted with Al, a content of the Al contained in the main crystal phase to a total content of Al in the main crystal phase and the remainder being greater than or equal to 10% on Al2O3 basis. Accordingly, provided is a dielectric ceramic having a high relative permittivity ?r, a high Qf value and a stable resonant-frequency temperature coefficient ?f close to 0 ppm/° C. Also provided is a dielectric filter which is provided with the dielectric ceramic and in which a desired relative permittivity can be obtained with stability and a high Qf value can be obtained, and excellent performance capability can be maintained for a long period of time with stability in a place where wide temperature variations are encountered.Type: ApplicationFiled: July 29, 2011Publication date: May 23, 2013Applicant: KYOCERA CORPORATIONInventors: Seiichirou Hirahara, Hajime Toda, Toshiyuki Sue, Yutaka Mori
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Publication number: 20120218054Abstract: A dielectric ceramic which is capable of stably having a desired relative dielectric constant (?r), while having high Q value and good temperature coefficient of the resonance frequency. Specifically disclosed is a dielectric ceramic which contains lanthanum, magnesium, calcium and titanium, and when the compositional formula of the components is expressed as ?La2Ox.?MgO.?CaO.?TiO2 (wherein 3?x?4), the molar ratios ?, ?, ? and ? satisfy the formulae below. The dielectric ceramic also contains aluminum in an amount of 5% by mass or less (excluding 0% by mass) in terms of oxides relative to 100% by mass of the above-mentioned components. 0.160???0.270 0.050???0.100 0.260???0.390 0.360???0.Type: ApplicationFiled: October 29, 2010Publication date: August 30, 2012Applicant: KYOCERA CORPORATIONInventors: Satoshi Toyoda, Seiichirou Hirahara, Shunichi Murakawa, Tsuyoshi Komatsu