Patents by Inventor Tsutomu Odashima
Tsutomu Odashima 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: 10276303Abstract: A dielectric composition contains barium titanate, an oxide of yttrium, and an oxide of magnesium. 0.70??/??1.10 is satisfied, where a content of the oxide of yttrium is ? mol part in terms of Y2O3, and a content of the oxide of magnesium is ? mol part in terms of MgO.Type: GrantFiled: August 29, 2017Date of Patent: April 30, 2019Assignee: TDK CORPORATIONInventors: Yushi Kano, Tsutomu Odashima, Makoto Momota, Hiroshi Sasaki, Masayuki Sato, Toshinari Takahashi
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Patent number: 10141113Abstract: A ceramic electronic component includes an interior part and an exterior part. The interior part includes an interior part dielectric layer and an internal electrode layer. The exterior part includes an exterior part dielectric layer. The exterior part is positioned outside the interior part along a laminating direction thereof. The interior part dielectric layer and the exterior part dielectric layer respectively contain barium titanate as a main component. ????0.20 and ?/??0.88 are satisfied, where ? mol part and ? mol part are respectively an amount of a rare earth element contained in the interior and exterior part dielectric layers, provided that an amount of barium titanate contained in the interior and exterior part dielectric layers is respectively 100 mol parts in terms of BaTiO3.Type: GrantFiled: December 28, 2016Date of Patent: November 27, 2018Assignee: TDK CorporationInventors: Masayuki Sato, Yosuke Konno, Shunichi Yuri, Takashi Morita, Tsutomu Odashima, Yushi Kanou, Kenta Yamashita
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Patent number: 9922766Abstract: A ceramic electronic component includes a dielectric layer and an electrode layer. The dielectric layer contains barium titanate and yttrium. The dielectric layer contains dielectric particles and Y—Ti segregation particles. An area ratio occupied by the Y—Ti segregation particles is 1.3% or less on a cross section of the dielectric layer.Type: GrantFiled: December 28, 2016Date of Patent: March 20, 2018Assignee: TDK CORPORATIONInventors: Masayuki Sato, Yosuke Konno, Shunichi Yuri, Takashi Morita, Tsutomu Odashima, Yasuhiro Ito
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Publication number: 20180061572Abstract: A dielectric composition contains barium titanate, an oxide of yttrium, and an oxide of magnesium. 0.70??/??1.10 is satisfied, where a content of the oxide of yttrium is ? mol part in terms of Y2O3, and a content of the oxide of magnesium is ? mol part in terms of MgO.Type: ApplicationFiled: August 29, 2017Publication date: March 1, 2018Applicant: TDK CORPORATIONInventors: Yushi KANO, Tsutomu ODASHIMA, Makoto MOMOTA, Hiroshi SASAKI, Masayuki SATO, Toshinari TAKAHASHI
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Patent number: 9818545Abstract: A ceramic electronic component includes a dielectric layer and an electrode layer. The dielectric layer contains a plurality of ceramic particles and grain boundary phases present therebetween. A main component of the ceramic particles is barium titanate. An average thickness of the grain boundary phases is 1.0 nm or more. A thickness variation ? of the grain boundary phases is 0.1 nm or less.Type: GrantFiled: December 28, 2016Date of Patent: November 14, 2017Assignee: TDK CorporationInventors: Masayuki Sato, Yosuke Konno, Shunichi Yuri, Yasuhiro Ito, Tsutomu Odashima, Yushi Kanou
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Publication number: 20170186536Abstract: A ceramic electronic component includes a dielectric layer and an electrode layer. The dielectric layer contains barium titanate and yttrium. The dielectric layer contains dielectric particles and Y—Ti segregation particles. An area ratio occupied by the Y—Ti segregation particles is 1.3% or less on a cross section of the dielectric layer.Type: ApplicationFiled: December 28, 2016Publication date: June 29, 2017Inventors: Masayuki SATO, Yosuke Konno, Shunichi Yuri, Takashi Morita, Tsutomu Odashima, Yasuhiro Ito
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Publication number: 20170186547Abstract: A ceramic electronic component includes an interior part and an exterior part. The interior part includes an interior part dielectric layer and an internal electrode layer. The exterior part includes an exterior part dielectric layer. The exterior part is positioned outside the interior part along a laminating direction thereof. The interior part dielectric layer and the exterior part dielectric layer respectively contain barium titanate as a main component. ????0.20 and ?/??0.88 are satisfied, where ? mol part and ? mol part are respectively an amount of a rare earth element contained in the interior and exterior part dielectric layers, provided that an amount of barium titanate contained in the interior and exterior part dielectric layers is respectively 100 mol parts in terms of BaTiO3.Type: ApplicationFiled: December 28, 2016Publication date: June 29, 2017Inventors: Masayuki SATO, Yosuke KONNO, Shunichi YURI, Takashi MORITA, Tsutomu ODASHIMA, Yushi KANOU, Kenta YAMASHITA
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Publication number: 20170186548Abstract: A ceramic electronic component includes a dielectric layer and an electrode layer. The dielectric layer contains a plurality of ceramic particles and grain boundary phases present therebetween. A main component of the ceramic particles is barium titanate. An average thickness of the grain boundary phases is 1.0 nm or more. A thickness variation ? of the grain boundary phases is 0.1 nm or less.Type: ApplicationFiled: December 28, 2016Publication date: June 29, 2017Inventors: Masayuki SATO, Yosuke Konno, Shunichi Yuri, Yasuhiro Ito, Tsutomu Odashima, Yushi Kanou
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Patent number: 7820578Abstract: The object of the present invention is to provide a method of production of dielectric ceramic composition which can lower the firing temperature without compensating the dielectric characteristics. The method of production according to the present invention is characterized by comprising steps of; preparing a dielectric oxide expressed by composition formula of [(CaxSr1-x)O]m[(TiyZr1-y-zHfz)O2] (x, y, z, and m in the formula are; 0.5?x?1.0, 0.01?y?0.10, 0<z?0.20 and 0.90?m?1.04 respectively), mixing, with respect to 100 parts by weight of the dielectric ceramic composition, 1 to 10 parts by weight of a sintering aid and 0.1 to 1.5 parts by weight of sodium oxide, sodium carbonate or a mixture thereof in terms of Na2O, and firing an obtained mixture; wherein said sintering aid comprises, with respect to 100 wt % of said sintering aid, 30 to 69 wt % of manganese compound in terms of MnO, 1 to 20 wt % of aluminum oxide in terms of Al2O3, and 30 to 50 wt % of silicon oxide in terms of SiO2.Type: GrantFiled: November 7, 2008Date of Patent: October 26, 2010Assignee: TDK CorporationInventors: Tetsuo Takaishi, Tomoaki Nonaka, Hiroshi Sasaki, Tsutomu Odashima, Kenta Iwasawa
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Patent number: 7662250Abstract: A production method of a dielectric ceramic composition at least including a main component including a dielectric oxide having perovskite-type crystal structure expressed by a formula ABO3 (note that in the formula, “A” indicates one or more elements selected from Ba, Ca, Sr and Mg, and that “B” indicates one or more elements selected from Ti, Zr and Hf) comprises steps of preparing a main component material including said dielectric oxide expressed by ABO3; preparing a subcomponent material including a composite oxide expressed by M4R6O(SiO4)6 (note that “M” indicates at least one selected from Ca and Sr, and that “R” indicates at least one selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu); mixing said main component material and subcomponent material to obtain a dielectric ceramic composition material; and firing said dielectric ceramic composition material.Type: GrantFiled: March 18, 2008Date of Patent: February 16, 2010Assignee: TDK CorporationInventors: Tomoaki Nonaka, Hiroshi Sasaki, Tsutomu Odashima, Tetsuo Takaishi, Takahiro Harada
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Publication number: 20090137381Abstract: The object of the present invention is to provide a method of production of dielectric ceramic composition which can lower the firing temperature without compensating the dielectric characteristics. The method of production according to the present invention is characterized by comprising steps of; preparing a dielectric oxide expressed by composition formula of [(CaxSr1-x)O]m[(TiyZr1-y-zHfz)O2] (x, y, z, and m in the formula are; 0.5?x?1.0, 0.01?y?0.10<z?0.20 and 0.90?m?1.04 respectively), mixing, with respect to 100 parts by weight of the dielectric ceramic composition, 1 to 10 parts by weight of a sintering aid and 0.1 to 1.5 parts by weight of sodium oxide, sodium carbonate or a mixture thereof in terms of Na2O, and firing an obtained mixture; wherein said sintering aid comprises, with respect to 100 wt % of said sintering aid, 30 to 69 wt % of manganese compound in terms of MnO, 1 to 20 wt % of aluminum oxide in terms of Al2O3, and 30 to 50 wt % of silicon oxide in terms of SiO2.Type: ApplicationFiled: November 7, 2008Publication date: May 28, 2009Applicant: TDK CORPORATIONInventors: Tetsuo Takaishi, Tomoaki Nonaka, Hiroshi Sasaki, Tsutomu Odashima, Kenta Iwasawa
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Publication number: 20080236723Abstract: A production method of a dielectric ceramic composition at least including a main component including a dielectric oxide having perovskite-type crystal structure expressed by a formula ABO3 (note that in the formula, “A” indicates one or more elements selected from Ba, Ca, Sr and Mg, and that “B” indicates one or more elements selected from Ti, Zr and Hf) comprises steps of preparing a main component material including said dielectric oxide expressed by ABO3; preparing a subcomponent material including a composite oxide expressed by M4R6O(SiO4)6 (note that “M” indicates at least one selected from Ca and Sr, and that “R” indicates at least one selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu); mixing said main component material and subcomponent material to obtain a dielectric ceramic composition material; and firing said dielectric ceramic composition material.Type: ApplicationFiled: March 18, 2008Publication date: October 2, 2008Applicant: TDK CORPORATIONInventors: Tomoaki Nonaka, Hiroshi Sasaki, Tsutomu Odashima, Tetsuo Takaishi, Takahiro Harada
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Patent number: 7220691Abstract: A dielectric ceramic composition comprising 100 moles of barium titanate as the main component, and furthermore comprising with respect to 100 moles of the main component 0.1 to 3 moles of a first subcomponent including a magnesium oxide, 0.01 to 0.5 mole (note that 0.5 is not included) of a second subcomponent including a yttrium oxide, 0.01 to 0.2 mole of a third subcomponent including a vanadium oxide, and 0.5 to 10 moles of a glass component including a silicon oxide as the main component; wherein a manganese oxide and a chrome oxide are substantially not included, and an average particle diameter of dielectric particles is 0.35 ?m or smaller.Type: GrantFiled: September 27, 2006Date of Patent: May 22, 2007Assignee: TDK CorporationInventors: Tomoaki Nonaka, Hiroshi Sasaki, Tsutomu Odashima, Takahiro Harada, Matsumi Watanabe, Tetsuo Takaishi, Shinsuke Hashimoto
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Publication number: 20070078049Abstract: A dielectric ceramic composition comprising 100 moles of barium titanate as the main component, and furthermore comprising with respect to 100 moles of the main component 0.1 to 3 moles of a first subcomponent including a magnesium oxide, 0.01 to 0.5 mole (note that 0.5 is not included) of a second subcomponent including a yttrium oxide, 0.01 to 0.2 mole of a third subcomponent including a vanadium oxide, and 0.5 to 10 moles of a glass component including a silicon oxide as the main component; wherein a manganese oxide and a chrome oxide are substantially not included, and an average particle diameter of dielectric particles is 0.35 ?m or smaller.Type: ApplicationFiled: September 27, 2006Publication date: April 5, 2007Applicant: TDK CORPORATIONInventors: Tomoaki Nonaka, Hiroshi Sasaki, Tsutomu Odashima, Takahiro Harada, Matsumi Watanabe, Tetsuo Takaishi, Shinsuke Hashimoto
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Publication number: 20070045912Abstract: A production method of a dielectric ceramic composition having a main component containing a compound having a perovskite crystal structure of the general formula ABO3 (where, A is at least one type of element selected from Ba, Ca, Sr, and Mg, and B is at least one type of element selected from Ti, Zr, and Hf), having a step of synthesizing an ABO3 powder by a liquid phase method or solid phase method, a step of heat treating said synthesized ABO3 powder to remove gas ingredients contained in said ABO3 powder, and a step of firing a dielectric ceramic composition material including said ABO3 powder from which the gas ingredient has been removed.Type: ApplicationFiled: August 25, 2006Publication date: March 1, 2007Applicant: TDK CorporationInventors: Hiroshi Sasaki, Tsutomu Odashima, Tomoaki Nonaka, Matsumi Watanabe