Patents by Inventor Yukio Isowaki
Yukio Isowaki 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: 8563871Abstract: It is provided a composite electronic part having magnetic material and dielectric material and made by co-sintering at a temperature of 1000° C. or lower. The magnetic material comprises a ferrite comprising 46 to 48 mol % of Fe2O3, 0.1 to 36 mol % of ZnO, 10 to 14 mol % of CuO and the balance being NiO. The dielectric material has a dielectric constant of 1000 or higher, and comprises a barium titanate based dielectric material to which 0.5 to 4.0 weight parts of CuO and 4.0 to 9.0 weight parts of Bi2O3 are added with respect to 100 weight parts of the barium titanate based dielectric material.Type: GrantFiled: February 9, 2011Date of Patent: October 22, 2013Assignees: Soshin Electric Co., Ltd., NGK Insulators, Ltd.Inventors: Yukio Isowaki, Tomoyuki Hasegawa, Hiroyuki Maruta, Tadashi Otagiri
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Patent number: 8562851Abstract: A ferrite material and an electronic component which employs sintered ferrite formed from the ferrite material. The ferrite material is obtained by adding, as minor ingredients, 0.06-0.50 parts by weight of bismuth oxide in terms of Bi2O3, 0.11-0.90 parts by weight of titanium oxide in terms of TiO2, and 0.06-0.46 parts by weight of barium oxide in terms of BaO to a ferrite powder comprising iron oxide, copper oxide, zinc oxide, and nickel oxide as major ingredients. The weight ratio among the bismuth oxide, the titanium oxide, and the barium oxide is as follows: when the proportion of the bismuth oxide in terms of Bi2O3 is taken as 1.00, then the proportion of the titanium oxide in terms of TiO2 is 1.08-2.72 and that of the barium oxide in terms of BaO is 0.72-1.20.Type: GrantFiled: March 25, 2010Date of Patent: October 22, 2013Assignees: Soshin Electric Co., Ltd., NGK Insulators, Ltd.Inventors: Yui Kumura, Yukio Isowaki, Tadashi Otagiri
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Publication number: 20120007015Abstract: A ferrite material and an electronic component which employs sintered ferrite formed from the ferrite material. The ferrite material is obtained by adding, as minor ingredients, 0.06-0.50 parts by weight of bismuth oxide in terms of Bi2O3, 0.11-0.90 parts by weight of titanium oxide in terms of TiO2, and 0.06-0.46 parts by weight of barium oxide in terms of BaO to a ferrite powder comprising iron oxide, copper oxide, zinc oxide, and nickel oxide as major ingredients. The weight ratio among the bismuth oxide, the titanium oxide, and the barium oxide is as follows: when the proportion of the bismuth oxide in terms of Bi2O3 is taken as 1.00, then the proportion of the titanium oxide in terms of TiO2 is 1.08-2.72 and that of the barium oxide in terms of BaO is 0.72-1.20.Type: ApplicationFiled: March 25, 2010Publication date: January 12, 2012Applicants: NGK Insulators, Ltd., Soshin Electric Co., Ltd.Inventors: Yui Kumura, Yukio Isowaki, Tadashi Otagiri
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Publication number: 20110162877Abstract: It is provided a composite electronic part having magnetic material 1 and dielectric material 2 and made by co-sintering at a temperature of 1000° C. or lower. The magnetic material 2 comprises a ferrite comprising 46 to 48 mol % of Fe2O3, 0.1 to 36 mol % of ZnO, 10 to 14 mol % of CuO and the balance being NiO. The dielectric material 1 has a dielectric constant of 1000 or higher, and comprises a barium titanate based dielectric material to which 0.5 to 4.0 weight parts of CuO and 4.0 to 9.0 weight parts of Bi2O3 are added with respect to 100 weight parts of the barium titanate based dielectric material.Type: ApplicationFiled: February 9, 2011Publication date: July 7, 2011Applicants: Soshin Electric Co., Ltd., NGK Insulators, Ltd.Inventors: Yukio Isowaki, Tomoyuki Hasegawa, Hiroyuki Maruta, Tadashi Otagiri
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Patent number: 7764143Abstract: The magnetic material constituting a magnetic portion is a ferrite mainly containing 31-42 mol % of NiO, 2-10 mol % of ZnO, 43-48 mol % of Fe2O3, 0.5-3 mol % of Co3O4, and 10-14 mol % of CuO. The dielectric material constituting a dielectric portion is mainly composed of xBaO.y1Nd2O3.y2Bi2O3.zTiO2 wherein 0.09?x?0.25, 0.05?y1?0.20, 0<y2?0.10 and 0.60?z?0.75. The dielectric material constituting a joint portion is a BaO—TiO2—ZnO dielectric material.Type: GrantFiled: February 10, 2006Date of Patent: July 27, 2010Assignee: Soshin Electric Co., Ltd.Inventors: Yuichi Miyata, Yukio Isowaki, Hiroyuki Maruta
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Patent number: 7737803Abstract: A sixth coil electrode forming a first coil is electrically connected to a twelfth coil electrode forming a second coil, for example, via a second capacitor electrode in a second capacitor electrode layer. Thus, an induction body has a permeability significantly smaller than the permeability of a magnetic body (for example permeability ?=1). Accordingly, it is possible to minimize the permeability to such a degree that it is possible to ignore the connection between the first coil and the second coil appearing equivalently and to obtain a desired frequency characteristic.Type: GrantFiled: February 10, 2006Date of Patent: June 15, 2010Assignee: Soshin Electric Co., Ltd.Inventors: Yuichi Miyata, Yukio Isowaki, Hiroyuki Maruta
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Publication number: 20090021326Abstract: A sixth coil electrode forming a first coil is electrically connected to a twelfth coil electrode forming a second coil, for example, via a second capacitor electrode in a second capacitor electrode layer. Thus, an induction body has a permeability significantly smaller than the permeability of a magnetic body (for example permeability ?=1). Accordingly, it is possible to minimize the permeability to such a degree that it is possible to ignore the connection between the first coil and the second coil appearing equivalently and to obtain a desired frequency characteristic.Type: ApplicationFiled: February 10, 2006Publication date: January 22, 2009Applicant: Soshin Electric Co., Ltd.Inventors: Yuichi Miyata, Yukio Isowaki, Hiroyuki Maruta
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Publication number: 20090009267Abstract: The magnetic material constituting a magnetic portion is a ferrite mainly containing 31-42 mol % of NiO, 2-10 mol % of ZnO, 43-48 mol % of Fe2O3, 0.5-3 mol % of Co3O4, and 10-14 mol % of CuO. The dielectric material constituting a dielectric portion is mainly composed of xBaO.y1Nd2O3.y2Bi2O3.zTiO2 wherein 0.09?x?0.25, 0.05?y1?0.20, 0<y2?0.10 and 0.60?z?0.75. The dielectric material constituting a joint portion is a BaO—TiO2—ZnO dielectric material.Type: ApplicationFiled: February 10, 2006Publication date: January 8, 2009Applicant: Soshin Electric Co., Ltd.Inventors: Yuichi Miyata, Yukio Isowaki, Hiroyuki Maruta