Patents by Inventor Shigeru Hirata

Shigeru Hirata 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).

  • Publication number: 20210317555
    Abstract: Alloy compositions, structures, and production methods for an appropriate slit cut surface shape improve productivity by increasing welding speed and stabilizing quality during high speed welding in Ti-containing Fe—Ni—Cr alloy production. The Ti-containing Fe—Ni—Cr alloy contains, hereinafter in weight %, C: 0.001 to 0.03%, Si: 0.05 to 1.25%, Mn: 0.10 to 2.00%, P: 0.001 to 0.030%, S: 0.0001 to 0.0030%, Ni: 15 to 50%, Cr: 17 to 25%, Al: 0.10 to 0.80%, Ti: 0.10 to 1.5%, N: 0.003 to 0.025%, 0: 0.0002 to 0.007%, Fe as a remainder, and inevitable impurities, and when the number and size of titanium nitrides contained in material are evaluated in a freely selected field of view of 5 mm2, the titanium nitrides having sizes of not more than 15 ?m are not less than 99.3% of total of the titanium nitrides.
    Type: Application
    Filed: September 17, 2019
    Publication date: October 14, 2021
    Applicant: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Toshio MIURA, Kazuhito TAKIMOTO, Fumiaki KIRIHARA, Shigeru HIRATA
  • Publication number: 20210151366
    Abstract: A semiconductor device includes a first lead having a base extending in a first direction, and an IC on the base. The semiconductor device also includes a second lead, a third lead and fourth leads. The second lead includes a first belt-like section on one side of the base in the first direction, extending in a second direction, and paired second belt-like sections extending in the first direction from the first belt-like section. The third lead is on one side in the first direction. The fourth leads are on one side of the third lead in the first direction. First switching elements are bonded to the third lead. Second switching elements are respectively bonded to the fourth leads. The base overlaps with the first belt-like section 121 when viewed in the first direction. At least a part of the base is between the second belt-like sections.
    Type: Application
    Filed: April 12, 2019
    Publication date: May 20, 2021
    Inventor: Shigeru HIRATA
  • Patent number: 10927438
    Abstract: Provided is an Fe—Ni—Cr alloy that has excellent surface characteristics and enables formation of a blackened coating having excellent blackening characteristics and peeling resistance. The Fe—Ni—Cr alloy has a chemical composition containing, by mass %, C, Si, Mn, P, S, Cr, Ni, Mo, Co, Cu, N, Ti, Al, O, and H, the balance being Fe and inevitable impurities, and satisfying formulae (1) to (4): (1) T1=11×[% N]+0.1; (2) T2=?39×[% N]?1.0; (3) A1=7.5×[% N]+0.1; (4) A2=?42.5×[% N]+1.0, where [% M] represents content (mass %) of element M in the alloy, and T1, T2, A1, and A2 satisfy relationships T1<[% Ti]<T2 and A1<[% A1]<A2.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: February 23, 2021
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Kazuhiro Yamakawa, Shigeru Hirata, Kun Wang, Hidekazu Todoroki
  • Patent number: 10832996
    Abstract: A power module includes a first die pad, a first switching element, a second die pad, a second switching element, an integrated circuit element, an encapsulation resin, and a lead frame assembly. The encapsulation resin encapsulates the first switching element, the second switching element, and the integrated circuit element. The lead frame assembly includes an outer lead and an inner lead. The lead frame assembly includes a first lead frame and a second lead frame. The first lead frame includes a first inner lead connected to the first die pad and a first outer lead connected to the first inner lead. The second lead frame includes a second inner lead connected to the second die pad and a second outer lead connected to the second inner lead.
    Type: Grant
    Filed: April 20, 2020
    Date of Patent: November 10, 2020
    Assignee: ROHM CO., LTD.
    Inventors: Yasumasa Kasuya, Hiroaki Matsubara, Hiroshi Kumano, Toshio Nakajima, Shigeru Hirata, Yuji Ishimatsu
  • Publication number: 20200251410
    Abstract: A power module includes a first die pad, a first switching element, a second die pad, a second switching element, an integrated circuit element, an encapsulation resin, and a lead frame assembly. The encapsulation resin encapsulates the first switching element, the second switching element, and the integrated circuit element. The lead frame assembly includes an outer lead and an inner lead. The lead frame assembly includes a first lead frame and a second lead frame. The first lead frame includes a first inner lead connected to the first die pad and a first outer lead connected to the first inner lead. The second lead frame includes a second inner lead connected to the second die pad and a second outer lead connected to the second inner lead.
    Type: Application
    Filed: April 20, 2020
    Publication date: August 6, 2020
    Inventors: Yasumasa KASUYA, Hiroaki MATSUBARA, Hiroshi KUMANO, Toshio NAKAJIMA, Shigeru HIRATA, Yuji ISHIMATSU
  • Patent number: 10679928
    Abstract: A power module includes a first die pad, a first switching element, a second die pad, a second switching element, an integrated circuit element, an encapsulation resin, and a lead frame assembly. The encapsulation resin encapsulates the first switching element, the second switching element, and the integrated circuit element. The lead frame assembly includes an outer lead and an inner lead. The lead frame assembly includes a first lead frame and a second lead frame. The first lead frame includes a first inner lead connected to the first die pad and a first outer lead connected to the first inner lead. The second lead frame includes a second inner lead connected to the second die pad and a second outer lead connected to the second inner lead.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: June 9, 2020
    Assignee: ROHM CO., LTD.
    Inventors: Yasumasa Kasuya, Hiroaki Matsubara, Hiroshi Kumano, Toshio Nakajima, Shigeru Hirata, Yuji Ishimatsu
  • Publication number: 20190360079
    Abstract: Provided is an Fe—Ni—Cr alloy that has excellent surface characteristics and enables formation of a blackened coating having excellent blackening characteristics and peeling resistance. The Fe—Ni—Cr alloy has a chemical composition containing, by mass %, C, Si, Mn, P, S, Cr, Ni, Mo, Co, Cu, N, Ti, Al, O, and H, the balance being Fe and inevitable impurities, and satisfying formulae (1) to (4): (1) T1=11×[% N]+0.1; (2) T2=?39×[% N]?1.0; (3) A1=7.5×[% N]+0.1; (4) A2=?42.5×[% N]+1.0, where [% M] represents content (mass %) of element M in the alloy, and T1, T2, A1, and A2 satisfy relationships T1<[% Ti]<T2 and A1<[% A1]<A2.
    Type: Application
    Filed: March 14, 2017
    Publication date: November 28, 2019
    Applicant: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Kazuhiro YAMAKAWA, Shigeru HIRATA, Kun WANG, Hidekazu TODOROKI
  • Publication number: 20180040540
    Abstract: A power module includes a first die pad, a first switching element, a second die pad, a second switching element, an integrated circuit element, an encapsulation resin, and a lead frame assembly. The encapsulation resin encapsulates the first switching element, the second switching element, and the integrated circuit element. The lead frame assembly includes an outer lead and an inner lead. The lead frame assembly includes a first lead frame and a second lead frame. The first lead frame includes a first inner lead connected to the first die pad and a first outer lead connected to the first inner lead. The second lead frame includes a second inner lead connected to the second die pad and a second outer lead connected to the second inner lead.
    Type: Application
    Filed: August 1, 2017
    Publication date: February 8, 2018
    Inventors: Yasumasa KASUYA, Hiroaki MATSUBARA, Hiroshi KUMANO, Toshio NAKAJIMA, Shigeru HIRATA, Yuji ISHIMATSU
  • Patent number: 9812408
    Abstract: A semiconductor device has a supply pad to which a supply voltage is fed, a supply conductor that is electrically connected to the supply pad, an input/output pad via which a signal is fed in from outside or fed out to outside, an electrostatic protection device that is electrically connected to the input/output pad and that is electrically connected via the supply conductor to the supply pad, and an internal circuit that is electrically connected via a signal conductor to the input/output pad. The electrostatic protection device, the input/output pad, and the internal circuit are arranged in this order from edge to center of the semiconductor device.
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: November 7, 2017
    Assignee: Rohm Co., Ltd.
    Inventor: Shigeru Hirata
  • Patent number: 9777356
    Abstract: An austenitic Fe—Ni—Cr alloy comprises C: 0.005˜0.03 mass %, Si: 0.17˜1.0 mass %, Mn: not more than 2.0 mass %, P: not more than 0.030 mass %, S: not more than 0.0015 mass %, Cr: 18˜28 mass %, Ni: 21.5˜32 mass %, Mo: 0.10˜2.8 mass %, Co: 0.05˜2.0 mass %, Cu: less than 0.25 mass %, N: not more than 0.018 mass %, Al: 0.10˜1.0 mass %, Ti: 0.10˜1.0 mass %, Zr: 0.01˜0.5 mass %, and the balance being Fe and inevitable impurities; wherein Cr, Mo, N and Cu satisfy PRE=Cr+3.3×Mo+16×N?20.0 and PREH=411-13.2×Cr-5.8×Mo+0.1×Mo2+1.2×Cu?145.0 and wherein Al, Ti, and Zr satisfy 0.5?Al+Ti+1.5×Zr?1.5, and has an excellent corrosion resistance in air or under a wet environment even at a surface state having an oxide film formed by an intermediate heat treatment.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: October 3, 2017
    Assignee: NIPPON YAKIN KOGYO CO., LTD.
    Inventors: Kazuhiro Yamakawa, Shigeru Hirata, Kun Wang
  • Patent number: 9528173
    Abstract: High-Mn austenitic stainless steels having a chemical composition comprising C: 0.02-0.12 mass %, Si: 0.05-1.5 mass %, Mn: 10.0-22.0 mass %, S: not more than 0.0028 mass %, Ni: 4.0-12.0 mass %, Cr: 14.0-25.0 mass % and N: 0.07-0.17 mass % with the balance being Fe and inevitable impurities, provided that these components are contained so that ? cal represented by the following equation is not more than 5.5%: ? cal (mass %)=(Cr+0.48Si)?(Ni+0.11Mn?0.0101Mn2+26.4C+20.1N)?4.7, wherein each element symbol in the equation is a content of the respective element (mass %), and having a magnetic permeability of not more than 1.003 under a magnetic field of 200 kA/m.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: December 27, 2016
    Assignee: NIPPON YAKIN KOGYO CO., LTD.
    Inventors: Shigeru Hirata, Yuji Ikegami, Kazuhiro Yamakawa
  • Patent number: 9391549
    Abstract: A motor driving device includes a clock oscillator configured to generate a clock signal; and a logic unit configured to receive the clock signal, control conduction of a 3-phase brushless direct current (DC) motor, and generate a revolutions per minute (RPM) detection signal. The clock oscillator is configured to switch an oscillation frequency of the clock signal depending on an RPM command signal input to set a target RPM of the 3-phase brushless DC motor.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: July 12, 2016
    Assignee: Rohm Co., Ltd.
    Inventor: Shigeru Hirata
  • Publication number: 20150376752
    Abstract: An austenitic Fe—Ni—Cr alloy comprises C: 0.005˜0.03 mass %, Si: 0.17˜4.0 mass %, Mn: not more than 2.0 mass %, P: not more than 0.030 mass %, S: not more than 0.0015 mass %, Cr: 18˜28 mass %, Ni: 21.5˜32 mass %, Mo: 0.10˜2.8 mass %, Co: 0.05˜2.0 mass %, Cu: less than 0.25 mass %, N: not more than 0.018 mass %, Al: 0.10˜4.0 mass %, Ti: 0.10˜1.0 mass %, Zr: 0.01˜0.5 mass %, and the balance being Fe and inevitable impurities; wherein Cr, Mo, N and Cu satisfy PRE=Cr+3.3×Mo+16×N?20.0 and PREH=411-13.2×Cr-5.8×Mo+0.1×Mo2+1.2×Cu?145.0 and wherein Al, Ti, and Zr satisfy 0.5?Al+Ti+1.5×Zr?1.5, and has an excellent corrosion resistance in air or under a wet environment even at a surface state having an oxide film formed by an intermediate heat treatment.
    Type: Application
    Filed: September 10, 2015
    Publication date: December 31, 2015
    Applicant: NIPPON YAKIN KOGYO CO., LTD.
    Inventors: Kazuhiro YAMAKAWA, Shigeru HIRATA, Kun WANG
  • Publication number: 20150084559
    Abstract: A motor driving device includes a clock oscillator configured to generate a clock signal; and a logic unit configured to receive the clock signal, control conduction of a 3-phase brushless direct current (DC) motor, and generate a revolutions per minute (RPM) detection signal. The clock oscillator is configured to switch an oscillation frequency of the clock signal depending on an RPM command signal input to set a target RPM of the 3-phase brushless DC motor.
    Type: Application
    Filed: September 19, 2014
    Publication date: March 26, 2015
    Inventor: Shigeru Hirata
  • Publication number: 20140332117
    Abstract: High-Mn austenitic stainless steels having a chemical composition comprising C: 0.02-0.12 mass %, Si: 0.05-1.5 mass %, Mn: 10.0-22.0 mass %, S: not more than 0.0028 mass %, Ni: 4.0-12.0 mass %, Cr: 14.0-25.0 mass % and N: 0.07-0.17 mass % with the balance being Fe and inevitable impurities, provided that these components are contained so that ? cal represented by the following equation is not more than 5.5%: ? cal (mass %)=(Cr+0.48Si)?(Ni+0.11Mn?0.0101Mn2+26.4C+20.1N)?4.7, wherein each element symbol in the equation is a content of the respective element (mass %), and having a magnetic permeability of not more than 1.003 under a magnetic field of 200 kA/m.
    Type: Application
    Filed: February 21, 2014
    Publication date: November 13, 2014
    Applicant: NIPPON YAKIN KOGYO CO., LTD.
    Inventors: Shigeru HIRATA, Yuji IKEGAMI, Kazuhiro YAMAKAWA
  • Publication number: 20140166158
    Abstract: High-Mn austenitic stainless steels having a chemical composition comprising C: 0.02-0.12 mass %, Si: 0.05-1.5 mass %, Mn: 10.0-22.0 mass %, S: not more than 0.0028 mass %, Ni: 4.0-12.0 mass %, Cr: 14.0-25.0 mass % and N: 0.07-0.17 mass % with the balance being Fe and inevitable impurities, provided that these components are contained so that ? cal represented by the following equation is not more than 5.5%: ? cal (mass %)=(Cr+0.48Si)?(Ni+0.11Mn?0.0101Mn2+26.4C+20.1N)?4.7, wherein each element symbol in the equation is a content of the respective element (mass %), and having a magnetic permeability of not more than 1.003 under a magnetic field of 200 kA/m.
    Type: Application
    Filed: February 21, 2014
    Publication date: June 19, 2014
    Applicant: NIPPON YAKIN KOGYO CO., LTD.
    Inventors: Shigeru HIRATA, Yuji IKEGAMI, Kazuhiro YAMAKAWA
  • Patent number: 8703047
    Abstract: As a stainless steel for a metal part for clothing ornament capable of working into a complicated form part and having such nonmagnetic properties that the worked part can cope with the detection through needle detecting device is provided a high-Mn austenitic stainless steel having a chemical composition comprising C: 0.02-0.12 mass %, Si: 0.05-1.5 mass %, Mn: 10.0-22.0 mass %, S: not more than 0.03 mass %, Ni: 4.0-12.0 mass %, Cr: 14.0-25.0 mass % and N: 0.07-0.17 mass %, provided that these components are contained so that ? cal (mass %) represented by the following equation (1) is not more than 5.5 mass %: ? cal (mass %)=(Cr+0.48Si+1.21Mo+2.2(V+Ti)+0.15Nb)?(Ni+0.47Cu+0.11Mn?0.0101Mn2+26.4C+20.1N)?4.7??(1) and having a magnetic permeability of not more than 1.003 under a magnetic field of 200 kA/m.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: April 22, 2014
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Shigeru Hirata, Yuji Ikegami, Kazuhiro Yamakawa
  • Publication number: 20130309124
    Abstract: An austenitic Fe—Ni—Cr alloy comprises C: 0.005˜0.03 mass %, Si: 0.15˜1.0 mass %, Mn: not more than 2.0 mass %, P: not more than 0.030 mass %, S: not more than 0.002 mass %, Cr: 18˜28 mass %, Ni: 20˜38 mass %, Mo: 0.10˜3 mass %, Co: 0.05˜2.0 mass %, Cu: less than 0.25 mass %, N: not more than 0.02 mass %, provided that PRE=Cr+3.3×Mo+16×N?20.0 and PREH=411?13.2×Cr?5.8×Mo+0.1×Mo2+1.2×Cu?145.0 (wherein each element symbol represents a content (mass %) of each element) and has an excellent corrosion resistance in air or under a wet environment even at a surface state having an oxide film formed by a intermediate heat treatment on the way of the production process.
    Type: Application
    Filed: April 22, 2013
    Publication date: November 21, 2013
    Applicant: NIPPON YAKIN KOGYO CO., LTD.
    Inventors: Kazuhiro YAMAKAWA, Shigeru HIRATA, Kun WANG
  • Patent number: D824866
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: August 7, 2018
    Assignee: ROHM CO., LTD.
    Inventors: Hiroaki Matsubara, Yasumasa Kasuya, Shigeru Hirata
  • Patent number: D902877
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: November 24, 2020
    Assignee: ROHM CO., LTD.
    Inventor: Shigeru Hirata