Patents by Inventor Yasutaka Fukuda
Yasutaka Fukuda 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: 20230236291Abstract: A decrease in sensitivity of distance measurement is reduced. A light receiving element includes a first voltage application unit and a second voltage application unit, a first charge detection unit, and a second charge detection unit. The first voltage application unit and the second voltage application unit are configured in linear shapes extending in the same direction on the surface of the semiconductor substrate that performs photoelectric conversion of the incident light, are arranged apart from each other, and are provided with proximity portions and applied with different voltages. The first charge detection unit is arranged around the first voltage application unit on the surface of the semiconductor substrate and detects a charge generated by photoelectric conversion. The second charge detection unit is arranged around the second voltage application unit on the surface of the semiconductor substrate and detects a charge generated by photoelectric conversion.Type: ApplicationFiled: April 20, 2021Publication date: July 27, 2023Inventor: YASUTAKA FUKUDA
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Patent number: 6903645Abstract: This invention provides a surface mounting type planar magnetic device comprised of upper ferrite magnetic film, lower ferrite magnetic film and a planar coil interposed therebetween. For applying surface mount technology, an opening is formed in the upper ferrite magnetic film above a coil terminal portion and then, an external electrode conductive with the coil terminal portion through the opening is formed on the upper ferrite magnetic film. Further, this surface mounting type planar magnetic device is of a thin structure and can be mounted on the surface of a printed board. Its power loss is small, its inductance is large, its frequency characteristic is excellent, the disparity of the characteristic is small and its reliability is excellent.Type: GrantFiled: March 4, 2004Date of Patent: June 7, 2005Assignees: Kawatetsu Mining Co., Ltd., Kabushiki Kaisha ToshibaInventors: Tetsuhiko Mizoguchi, Tetsuo Inoue, Shigeru Yatabe, Yasutaka Fukuda, Yoshihito Tachi
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Patent number: 6831543Abstract: A surface mounting type planar magnetic device comprised of upper ferrite magnetic film, lower ferrite magnetic film and a planar coil interposed therebetween. For applying surface mount technology, an opening is formed in the upper ferrite magnetic film above a coil terminal portion and then, an external electrode conductive with the coil terminal portion through the opening is formed on the upper ferrite magnetic film. Further, this surface mounting type planar magnetic device is of a thin structure and can be mounted on the surface of a printed board. Its power loss is small, its inductance is large, its frequency characteristic is excellent, the disparity of the characteristic is small and its reliability is excellent.Type: GrantFiled: February 23, 2001Date of Patent: December 14, 2004Assignees: Kawatetsu Mining Co., Ltd., Kabushiki Kaisha ToshibaInventors: Tetsuhiko Mizoguchi, Tetsuo Inoue, Shigeru Yatabe, Yasutaka Fukuda, Yoshihito Tachi
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Publication number: 20040166370Abstract: This invention provides a surface mounting type planar magnetic device comprised of upper ferrite magnetic film, lower ferrite magnetic film and a planar coil interposed therebetween. For applying surface mount technology, an opening is formed in the upper ferrite magnetic film above a coil terminal portion and then, an external electrode conductive with the coil terminal portion through the opening is formed on the upper ferrite magnetic film. Further, this surface mounting type planar magnetic device is of a thin structure and can be mounted on the surface of a printed board. Its power loss is small, its inductance is large, its frequency characteristic is excellent, the disparity of the characteristic is small and its reliability is excellent.Type: ApplicationFiled: March 4, 2004Publication date: August 26, 2004Applicants: Kawatetsu Mining Co., Ltd., Kabushiki Kaisha ToshibaInventors: Tetsuhiko Mizoguchi, Tetsuo Inoue, Shigeru Yatabe, Yasutaka Fukuda, Yoshihito Tachi
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Patent number: 6383626Abstract: A magnetic ferrite paste is applied onto an Si substrate, and then sintered to form thereon a magnetic ferrite film having a mean composition that comprises from 40 to 50 mol % of Fe2O3, from 15 to 35 mol % of ZnO, from 0 to 20 mol % of CuO, and from 0 to 10 mol % of Bi2O3 with NiO and inevitable impurities as the balance. The magnetic ferrite film thus formed on an Si substrate is for magnetic devices, and it forms a region not containing CuO or having a CuO content of at most 5 mol % around its interface directly adjacent to the surface of the Si substrate. The adhesiveness of the magnetic ferrite film to the underlying Si substrate is high, and the reliability of the magnetic device having the magnetic film is therefore high.Type: GrantFiled: April 12, 2000Date of Patent: May 7, 2002Assignee: Kawatetsu Mining Co., Ltd.Inventors: Yasutaka Fukuda, Yoshihito Tachi
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Publication number: 20010024739Abstract: This invention provides a surface mounting type planar magnetic device comprised of upper ferrite magnetic film, lower ferrite magnetic film and a planar coil interposed therebetween. For applying surface mount technology, an opening is formed in the upper ferrite magnetic film above a coil terminal portion and then, an external electrode conductive with the coil terminal portion through the opening is formed on the upper ferrite magnetic film. Further, this surface mounting type planar magnetic device is of a thin structure and can be mounted on the surface of a printed board. Its power loss is small, its inductance is large, its frequency characteristic is excellent, the disparity of the characteristic is small and its reliability is excellent.Type: ApplicationFiled: February 23, 2001Publication date: September 27, 2001Applicant: KAWATETSU MINING CO., LTD.Inventors: Tetsuhiko Mizoguchi, Tetsuo Inoue, Shigeru Yatabe, Yasutaka Fukuda, Yoshihito Tachi
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Patent number: 5447578Abstract: This invention provides permanent magnets that are excellent not only in magnetic properties but also corrosion resistance by using two magnetically useful phases, i.e., RE.sub.2 TM.sub.14 B phase having a high residual magnetic flux density and a low melting point RE-TM' phase or RE-TM'-B phase which enhances the sinterability and possesses a cleaning action against grain boundaries of the RE.sub.2 TM.sub.14 B main phase. Further the invention provides a method for forming an electrochemically noble composition as a starting material to prepare a two phase magnet.Type: GrantFiled: June 28, 1994Date of Patent: September 5, 1995Assignee: Kawasaki Steel CorporationInventors: Yukiko Ozaki, Michio Shimotomai, Yasutaka Fukuda, Akira Fujita, Yoko Kitano, Junichi Shimomura
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Patent number: 5437741Abstract: A corrosion-resistant rare earth metal-transition metal-boron permanent magnet having improved corrosion resistance and excellent magnetic properties, including RE: 10-25 at % (where RE is at least one of Y, Sc and lanthanides), B: 2-20 at % and the remainder being substantially Fe, Co and Ni. In this case, the magnet has an average crystal grain size of 0.1-50 .mu.m and includes a crystal grain boundary phase of RE(Ni.sub.1-x-y Co.sub.x Fe.sub.y) compound having a thickness of not more than 10 .mu.m.Type: GrantFiled: May 5, 1994Date of Patent: August 1, 1995Assignee: Kawasaki Steel CorporationInventors: Yukiko Ozaki, Michio Shimotomai, Yasutaka Fukuda, Akira Fujita, Yoko Kitano, Junichi Shimomura
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Patent number: 5015307Abstract: A corrosion-resistant rare earth metal-transition metal magnet alloy having excellent coercive force, squareness, corrosion resistance and temperature characteristics is disclosed, which alloy consists of at least one of rare earth element inclusive of Y; B; occasionally at least one of Mg, Al, Si, Ca, Ti, V, Cr, Mn, Cu, Zn, Ga, Ge, Zr, Nb, Mo, In, Sn, Ta and W; and the remainder being transition metals of Fe, Co and Ni.Type: GrantFiled: September 30, 1988Date of Patent: May 14, 1991Assignee: Kawasaki Steel CorporationInventors: Michio Shimotomai, Yasutaka Fukuda, Akira Fujita
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Patent number: 4698251Abstract: A magnetic disk or like magnetic recording medium having a magnetic layer provided on a non-magnetic substrate by dry-process or wet-process plating means and allowing a head to write and read data thereinto and thereoutof, and a method or producing such a recording medium. Scratch marks are formed on the surface of a non-magnetic thin layer, which is provided on the substrate, at a predetermined pitch and a predetermined depth in a particular direction which is substantially aligned with a direction in which the head writes data. A magnetic layer is deposited on the scratched surface of the non-magnetic layer. The pitch is less than about 50 microns, preferably about 0.1 to 10 microns, while the depth is about 0.002 to 0.1 microns in terms of center line mean roughness.Type: GrantFiled: January 17, 1986Date of Patent: October 6, 1987Assignee: Victor Company of Japan, LimitedInventors: Yasutaka Fukuda, Shigeo Shimizu, Atsushi Nakano