Patents by Inventor Kunihide Shikata
Kunihide Shikata 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: 20210292239Abstract: The light shielding member of the present disclosure includes an aluminum oxide ceramics including an oxide of titanium whose composition formula is shown as TiO2-x (1?x<2), and a total content of Fe, Ni, Co, Mn and Cr is 260 mass ppm or less.Type: ApplicationFiled: August 6, 2019Publication date: September 23, 2021Inventors: Satoshi KIYOTA, Kazuo WATADA, Takehisa HIGA, Masamichi SHINGU, Kunihide SHIKATA
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Patent number: 9980384Abstract: The circuit board includes a ceramic sintered body and a metal wiring layer provided on at least one primary surface thereof with a glass layer interposed therebetween, and when the cross section of the circuit board perpendicular to the primary surface of the ceramic sintered body is viewed, the ratio of the length of an interface between the glass layer and the metal wiring layer to a length of the glass layer in a direction along the primary surface is 1.25 to 1.80.Type: GrantFiled: June 21, 2013Date of Patent: May 22, 2018Assignee: KYOCERA CorporationInventors: Yoshio Ohashi, Kunihide Shikata
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Patent number: 9820379Abstract: A circuit board and an electronic device having the circuit board that includes a ceramic sintered body, a through conductor and a metal wiring layer. The ceramic sintered body includes a through hole penetrating from a first main surface to a second main surface thereof. The through conductor is in the through hole and has first and second ends. The metal wiring layer covering the first end and electrically connected to the through conductor. The through conductor includes: a first portion having a hollow cylinder shape, in contact with an inner wall of the through hole and extending from the first end to the second end; and a second portion having a columnar shape and disposed inside the first portion. The second portion has an average grain size of the metal larger than that in the first portion.Type: GrantFiled: May 30, 2012Date of Patent: November 14, 2017Assignee: Kyocera CorporationInventors: Kiyotaka Nakamura, Yoshio Ohashi, Yuuichi Abe, Eisuke Hirano, Kunihide Shikata, Keiichi Sekiguchi
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Patent number: 9161444Abstract: A circuit board is provided with a metal wiring layer 12 on at least one principal surface of a ceramic sintered body 11, wherein the above-described metal wiring layer includes a first region 12a which is in contact with the principal surface and which contains a glass component and a second region 12b which is located on the first region 12a and which does not contain a glass component, the thickness of the first region 12a is 35% or more and 70% or less of the thickness of the metal wiring layer 12, and the average grain size in the first region 12a is smaller than the average grain size in the second region 12b.Type: GrantFiled: September 28, 2012Date of Patent: October 13, 2015Assignee: KYOCERA CORPORATIONInventors: Kiyotaka Nakamura, Yoshio Ohashi, Kunihide Shikata
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Publication number: 20150144385Abstract: The circuit board includes a ceramic sintered body and a metal wiring layer provided on at least one primary surface thereof with a glass layer interposed therebetween, and when the cross section of the circuit board perpendicular to the primary surface of the ceramic sintered body is viewed, the ratio of the length of an interface between the glass layer and the metal wiring layer to a length of the glass layer in a direction along the primary surface is 1.25 to 1.80.Type: ApplicationFiled: June 21, 2013Publication date: May 28, 2015Applicant: KYOCERA CorporationInventors: Yoshio Ohashi, Kunihide Shikata
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Patent number: 8981630Abstract: A ceramics substrate for mounting a light-emitting element includes a ceramic sintered body, the ceramic sintered body having a mounting section on which a light-emitting element is mounted, in a surface portion on a mounting section side of the ceramic sintered body, a ratio of crystal grains having a crystal grain size of 0.2 ?m to 1.0 ?m in equivalent circle diameter being in a range of 45% to 80%, a ratio of crystal gains having a crystal grain size of 2.0 ?m to 6.0 ?m in equivalent circle diameter being in a range of 5% to 15%, and a ratio of crystal grains having a crystal grain size of more than 6.0 ?m in equivalent circle diameter being 2.7% or less.Type: GrantFiled: September 28, 2011Date of Patent: March 17, 2015Assignee: KYOCERA CorporationInventors: Kunihide Shikata, Kazuhide Kusano
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Publication number: 20140284088Abstract: A circuit board is provided with a metal wiring layer 12 on at least one principal surface of a ceramic sintered body 11, wherein the above-described metal wiring layer includes a first region 12a which is in contact with the principal surface and which contains a glass component and a second region 12b which is located on the first region 12a and which does not contain a glass component, the thickness of the first region 12a is 35% or more and 70% or less of the thickness of the metal wiring layer 12, and the average grain size in the first region 12a is smaller than the average grain size in the second region 12b.Type: ApplicationFiled: September 28, 2012Publication date: September 25, 2014Inventors: Kiyotaka Nakamura, Yoshio Ohashi, Kunihide Shikata
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Publication number: 20140268589Abstract: A circuit board and an electronic device having the circuit board that includes a ceramic sintered body, a through conductor and a metal wiring layer. The ceramic sintered body includes a through hole penetrating from a first main surface to a second main surface thereof. The through conductor is in the through hole and has first and second ends. The metal wiring layer covering the first end and electrically connected to the through conductor. The through conductor includes: a first portion having a hollow cylinder shape, in contact with an inner wall of the through hole and extending from the first end to the second end; and a second portion having a columnar shape and disposed inside the first portion. The second portion has an average grain size of the metal larger than that in the first portion.Type: ApplicationFiled: May 30, 2012Publication date: September 18, 2014Applicant: Kyocera CorporationInventors: Kiyotaka Nakamura, Yshio Ohashi, Yuuichi Abe, Eisuke Hirano, Kunihide Shikata, Kiichi Sekiguchi
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Publication number: 20130181593Abstract: A ceramics substrate for mounting a light-emitting element includes a ceramic sintered body, the ceramic sintered body having a mounting section on which a light-emitting element is mounted, in a surface portion on a mounting section side of the ceramic sintered body, a ratio of crystal grains having a crystal grain size of 0.2 ?m to 1.0 ?m in equivalent circle diameter being in a range of 45% to 80%, a ratio of crystal gains having a crystal grain size of 2.0 ?m to 6.0 ?m in equivalent circle diameter being in a range of 5% to 15%, and a ratio of crystal grains having a crystal grain size of more than 6.0 ?m in equivalent circle diameter being 2.7% or less.Type: ApplicationFiled: September 28, 2011Publication date: July 18, 2013Applicant: KYOCERA CORPORATIONInventors: Kunihide Shikata, Kazuhide Kusano
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Patent number: 8383236Abstract: Provided are a zirconia sintered body that has excellent mechanical characteristics, as well as semiconductivity that can allow static electricity to escape at an appropriate rate, and a manufacturing method that can manufacture the same at lower cost than in the past. The zirconia sintered body is made of 66-90 parts by weight of zirconia that contains a stabilizer, and a total of 10-34 parts by weight of iron, chromium and titanium oxides. Of the iron, chromium and titanium oxides, the proportion of iron oxide is 70-99.5 wt %, the proportion of chromium oxide is 0.4-20 wt % and the proportion of titanium oxide is 0.1-10 wt %. The combined proportion of tetragonal and cubic crystals in the zirconia crystal phase is 90% or more and the mean crystal grain size of the zirconia is 0.3-0.5 ?m. The mean crystal grain size of the iron, chromium and titanium oxides is 0.5-2.0 ?m. It has excellent mechanical characteristics, as well as semiconductivity.Type: GrantFiled: February 6, 2009Date of Patent: February 26, 2013Assignee: Kyocera CorporationInventors: Shunji Mikaki, Kunihide Shikata
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Patent number: 8207077Abstract: The present invention provides a dense, abrasion resistant ceramic. The ceramic of the invention includes alumina crystal particles and a grain boundary phase. The invention also includes an abrasion resistant sliding member and a pump comprising the same.Type: GrantFiled: October 28, 2008Date of Patent: June 26, 2012Assignee: Kyocera CorporationInventors: Kunihide Shikata, Teruaki Katagiri
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Publication number: 20110070441Abstract: Provided are a zirconia sintered body that has excellent mechanical characteristics, as well as semiconductivity that can allow static electricity to escape at an appropriate rate, and a manufacturing method that can manufacture the same at lower cost than in the past. The zirconia sintered body is made of 66-90 parts by weight of zirconia that contains a stabilizer, and a total of 10-34 parts by weight of iron, chromium and titanium oxides. Of the iron, chromium and titanium oxides, the proportion of iron oxide is 70-99.5 wt %, the proportion of chromium oxide is 0.4-20 wt % and the proportion of titanium oxide is 0.1-10 wt %. The combined proportion of tetragonal and cubic crystals in the zirconia crystal phase is 90% or more and the mean crystal grain size of the zirconia is 0.3-0.5 ?m. The mean crystal grain size of the iron, chromium and titanium oxides is 0.5-2.0 ?m. It has excellent mechanical characteristics, as well as semiconductivity.Type: ApplicationFiled: February 6, 2009Publication date: March 24, 2011Applicant: KYOCERA CORPORATIONInventors: Shunji Mikaki, Kunihide Shikata
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Patent number: 7820577Abstract: A biomedical member having high strength, high toughness and high hardness and an artificial joint that uses the same are provided. In addition, a biomedical member that exhibits high wear resistance even in in vivo environment and an artificial joint are provided. Such a composite ceramic is used that contains 65% by weight or more Al2O3, 4 to 34% by weight of ZrO2 and 0.1 to 4% by weight of SrO, while Sr forms a solid solution with part of the ZrO2 grains. The composite ceramics further contains TiO2, MgO and SiO2 as sintering additives, while controlling the amounts to 0.20% by weight or more SiO2, 0.22% by weight or more TiO2 and 0.12% by weight or more MgO, and the total amount of SiO2, TiO2 and MgO within a range from 0.6 to 4.5% by weight.Type: GrantFiled: October 29, 2004Date of Patent: October 26, 2010Assignee: Kyocera CorporationInventors: Kunihide Shikata, Takefumi Nakanishi, Yucong Wang
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Publication number: 20100234207Abstract: The present invention provides a dense, abrasion resistant ceramic. The ceramic of the invention includes alumina crystal particles and a grain boundary phase. The invention also includes an abrasion resistant sliding member and a pump comprising the same.Type: ApplicationFiled: October 28, 2008Publication date: September 16, 2010Inventors: Kunihide Shikata, Teruaki Katagiri
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Publication number: 20080275568Abstract: A biomedical member having high strength, high toughness and high hardness and an artificial joint that uses the same are provided. In addition, a biomedical member that exhibits high wear resistance even in in vivo environment and an artificial joint are provided. Such a composite ceramic is used that contains 65% by weight or more Al2O3, 4 to 34% by weight of ZrO2 and 0.1 to 4% by weight of SrO, while Sr forms a solid solution with part of the ZrO2 grains. The composite ceramics further contains TiO2, MgO and SiO2 as sintering additives, while controlling the amounts to 0.20% by weight or more SiO2, 0.22% by weight or more TiO2 and 0.12% by weight or more MgO, and the total amount of SiO2, TiO2 and MgO within a range from 0.6 to 4.5% by weight.Type: ApplicationFiled: October 29, 2004Publication date: November 6, 2008Inventors: Kunihide Shikata, Takefumi Nakanishi, Yucong Wang
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Patent number: 7399722Abstract: Composite ceramics having a high strength, a high toughness and an excellent abrasion resistance, and a method of producing the same. The composite ceramics comprises 10 to 30 mass % of a zirconia crystal phase including Ce-stabilized zirconia crystal particles which contain CeO2 in an amount of 9 to 12 mol % and Y-stabilized zirconia crystal particles which contain Y2O3 in an amount of 2.8 to 4.5 mol %; and 70 to 90 mass % of an alumina crystal phase, the zirconia crystal phase having an average crystal particle size of not larger than 1 ?m.Type: GrantFiled: March 2, 2006Date of Patent: July 15, 2008Assignee: Kyocera CorporationInventors: Kunihide Shikata, Shugo Onitsuka, Wang Yucong
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Publication number: 20080118722Abstract: A composite ceramic of the present invention includes granular alumina particles (A) having an aspect ratio of 3 or less, granular zirconia particles (B) having an aspect ratio of 3 or less, and a columnar crystal (C) having an aspect ratio of 3 or more, the columnar crystal including a complex metal oxide containing an alkaline-earth metal element and aluminum element. The composite ceramic has high flexural strength, toughness, and hardness, and achieves excellent hot-water resistance and high flexural strength after hydrothermal degradation resistance test.Type: ApplicationFiled: January 24, 2006Publication date: May 22, 2008Applicant: KYOCERA CorporationInventors: Kunihide Shikata, Yucong Wang, Hiroaki Seno, Shugo Onitsuka
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Patent number: 7148167Abstract: Alumina/zirconia ceramics containing Al2O3 in an amount of not less than 65 mass % and ZrO2 in an amount of 4 to 34 mass %, and further containing TiO2, MgO and SiO2. The ceramics effectively suppresses the growth of shape isotropic particles of alumina, suppresses the growth of zirconia particles, and has a high strength and a high hardness. Besides, the ceramics containing SrO features a high fracture toughness.Type: GrantFiled: August 26, 2004Date of Patent: December 12, 2006Assignee: Kyocera CorporationInventors: Kunihide Shikata, Shugo Onitsuka, Yucong Wang, Hiroaki Seno
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Publication number: 20060178257Abstract: Composite ceramics having a high strength, a high toughness and an excellent abrasion resistance, and a method of producing the same. The composite ceramics comprises 10 to 30 mass % of a zirconia crystal phase including Ce-stabilized zirconia crystal particles which contain CeO2 in an amount of 9 to 12 mol % and Y-stabilized zirconia crystal particles which contain Y2O3 in an amount of 2.8 to 4.5 mol %; and 70 to 90 mass % of an alumina crystal phase, the zirconia crystal phase having an average crystal particle size of not larger than 1 ?m.Type: ApplicationFiled: March 2, 2006Publication date: August 10, 2006Inventors: Kunihide Shikata, Shugo Onitsuka, Wang Yucong
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Publication number: 20050119107Abstract: Composite ceramics having a high strength, a high toughness and an excellent abrasion resistance, and a method of producing the same. The composite ceramics comprises 10 to 30 mass % of a zirconia crystal phase containing 9 to 12 mol % of CeO2 and 2.8 to 4.5 mol % of Y2O3; and 70 to 90 mass % of an alumina crystal phase, the zirconia crystal phase having an average crystal particle size of not larger than 1 ?m.Type: ApplicationFiled: September 8, 2004Publication date: June 2, 2005Inventors: Kunihide Shikata, Shugo Onitsuka, Wang Yucong