Patents by Inventor Kazumasa Ohashi

Kazumasa Ohashi 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).

  • Patent number: 10337100
    Abstract: A method of producing a Ni—P alloy sputtering target, wherein a Ni—P alloy having a P content of 15 to 21 wt % and remainder being Ni and unavoidable impurities is melted and atomized to prepare a Ni—P alloy atomized powder having an average grain size of 100 ?m or less, the Ni—P alloy atomized powder is mixed with a pure Ni atomized powder, and the obtained mixed powder is hot pressed. An object of the present invention is to provide a method of producing a Ni—P alloy sputtering target which achieves a small deviation from an intended composition.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: July 2, 2019
    Assignee: JX NIPPON MINING & METALS CORPORATION
    Inventors: Kazumasa Ohashi, Kunihiro Oda
  • Patent number: 10176974
    Abstract: A sputtering target containing 0.01 to 0.5 wt % of Ag, and remainder being W and unavoidable impurities. The object of the present invention is to provide a sputtering target capable of forming a film having a relatively low specific resistance by sputtering, wherein the obtained film is endowed with good uniformity, and in particular the sputtering target has superior characteristics upon forming thin films for semiconductor devices, as well as to provide a method for producing the foregoing sputtering target.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: January 8, 2019
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Kazumasa Ohashi, Kunihiro Oda
  • Publication number: 20180347031
    Abstract: A tungsten sintered compact sputtering target and film are provided. The purity of the tungsten is 5N (99.999%) or more and the content of impurity carbon in the tungsten is 5 wtppm or less. The tungsten film, which is sputter-deposited by using the tungsten sintered compact sputtering target, has a low specific resistance due to the reduced carbon content in the tungsten target.
    Type: Application
    Filed: August 9, 2018
    Publication date: December 6, 2018
    Inventors: Kazumasa Ohashi, Takeo Okabe
  • Publication number: 20180261438
    Abstract: A tungsten sintered compact sputtering target, wherein a molybdenum strength detected with a secondary ion mass spectrometer (D-SIMS) is equal to or less than 1/10000 of the tungsten strength. This target reduces the specific resistance of a tungsten film sputtered using the tungsten sintered compact target by reducing the molybdenum in the tungsten sintered compact sputtering target and adjusting the grain size distribution of the W powder that is used during sintering.
    Type: Application
    Filed: March 2, 2018
    Publication date: September 13, 2018
    Inventors: Kengo Kaminaga, Kazumasa Ohashi
  • Patent number: 10047433
    Abstract: Provided is a tungsten sintered compact sputtering target, wherein the purity of the tungsten is 5N (99.999%) or more, and the content of impurity carbon in the tungsten is 5 wtppm or less. An object of the present invention is to decrease the specific resistance of a tungsten film sputter-deposited by using a tungsten sintered compact sputtering target by reducing a carbon content in the tungsten target.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: August 14, 2018
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Kazumasa Ohashi, Takeo Okabe
  • Patent number: 10006117
    Abstract: Provided is a sputtering target-backing plate assembly wherein a Cu—Cr alloy backing plate is bonded to a Ti target via a layer of a strain absorbing material placed at an interface between the Ti target and the Cu—Cr alloy backing plate. In particular, the present invention relates to a sputtering target-backing plate assembly and a production method thereof, the assembly being capable of absorbing strain at the interface between the target and the backing plate in order to prevent deformation (displacement) during sputtering. An object of the present invention is to solve a problem inherent to Titanium (Ti) and a problem in selecting a backing plate compatible with it.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: June 26, 2018
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Shiro Tsukamoto, Kazumasa Ohashi
  • Patent number: 9812301
    Abstract: Provided is a tungsten sintered compact sputtering target containing iron as an impurity in an amount of 0.8 wtppm or less, and remainder being tungsten and other unavoidable impurities, wherein a range of iron concentration in a target structure is within a range of ±0.1 wtppm of an average concentration. Additionally provided is a tungsten sintered compact sputtering target, wherein a relative density of the target is 99% or higher, an average crystal grain size is 50 ?m or less, and a crystal grain size range is 5 to 200 ?m. The present invention aims to inhibit abnormal grain growth in the tungsten target by reducing the amount of iron in the tungsten sintered compact sputtering target.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: November 7, 2017
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Kazumasa Ohashi, Takeo Okabe
  • Publication number: 20170211176
    Abstract: A sputtering target containing 0.01 to 0.5 wt % of Ag, and remainder being W and unavoidable impurities. The object of the present invention is to provide a sputtering target capable of forming a film having a relatively low specific resistance by sputtering, wherein the obtained film is endowed with good uniformity, and in particular the sputtering target has superior characteristics upon forming thin films for semiconductor devices, as well as to provide a method for producing the foregoing sputtering target.
    Type: Application
    Filed: September 28, 2015
    Publication date: July 27, 2017
    Inventors: Kazumasa Ohashi, Kunihiro Oda
  • Publication number: 20170121811
    Abstract: A method of producing a Ni—P alloy sputtering target, wherein a Ni—P alloy having a P content of 15 to 21 wt % and remainder being Ni and unavoidable impurities is melted and atomized to prepare a Ni—P alloy atomized powder having an average grain size of 100 ?m or less, the Ni—P alloy atomized powder is mixed with a pure Ni atomized powder, and the obtained mixed powder is hot pressed. An object of the present invention is to provide a method of producing a Ni—P alloy sputtering target which achieves a small deviation from an intended composition.
    Type: Application
    Filed: March 12, 2015
    Publication date: May 4, 2017
    Inventors: Kazumasa Ohashi, Kunihiro Oda
  • Publication number: 20160333460
    Abstract: The present invention provides a sputtering target configured from tungsten carbide or titanium carbide, characterized in having a purity of 4N or higher and a density of 98% or higher. Specifically, an object of the present invention is to provide a sputtering target configured from tungsten carbide or titanium carbide, wherein the purity is maintained high, and the target has a high density and a uniform and high hardness and is capable of stable high speed deposition and less generation of particles.
    Type: Application
    Filed: March 13, 2015
    Publication date: November 17, 2016
    Inventors: Kazumasa Ohashi, Kunihiro Oda
  • Patent number: 9249497
    Abstract: Provided is a Ni alloy sputtering target containing Pt in an amount of 5 to 30 at %, and one or more components selected from V, Al, Cr, Ti, Mo, and Si in a total amount of 1 to 5 at %, wherein the remainder is Ni and unavoidable impurities. The present invention is able to increase the low pass-through flux (PTF), which is a drawback of a Ni—Pt alloy having high magnetic permeability, increase the erosion area of the target which tends to be small as a result of the magnetic field lines being locally concentrated on the surface of the target during sputtering, and inhibit the difference between the portion where erosion is selectively advanced and the portion where erosion does not advance as much as the erosion progresses.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: February 2, 2016
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Yasuhiro Yamakoshi, Kazumasa Ohashi
  • Publication number: 20150357170
    Abstract: Provided is a tungsten sintered compact sputtering target containing iron as an impurity in an amount of 0.8 wtppm or less, and remainder being tungsten and other unavoidable impurities, wherein a range of iron concentration in a target structure is within a range of ±0.1 wtppm of an average concentration. Additionally provided is a tungsten sintered compact sputtering target according to claim 1 or claim 2, wherein a relative density of the target is 99% or higher, an average crystal grain size is 50 ?m or less, and a crystal grain size range is 5 to 200 ?m. The present invention aims to inhibit abnormal grain growth in the tungsten target by reducing the amount of iron in the tungsten sintered compact sputtering target.
    Type: Application
    Filed: March 20, 2014
    Publication date: December 10, 2015
    Inventors: Kazumasa Ohashi, Takeo Okabe
  • Publication number: 20150303040
    Abstract: A tungsten sintered compact sputtering target, wherein a molybdenum strength detected with a secondary ion mass spectrometer (D-SIMS) is equal to or less than 1/10000 of the tungsten strength. This invention aims to reduce the specific resistance of a tungsten film sputtered using the tungsten sintered compact target by reducing the molybdenum in the tungsten sintered compact sputtering target and adjusting the grain size distribution of the W powder that is used during sintering.
    Type: Application
    Filed: October 24, 2013
    Publication date: October 22, 2015
    Applicant: JX Nippon Mining & Metals Corporation
    Inventors: Kengo Kaminaga, Kazumasa Ohashi
  • Publication number: 20150023837
    Abstract: Provided is a tungsten sintered compact sputtering target, wherein the purity of the tungsten is 5N (99.999%) or more, and the content of impurity carbon in the tungsten is 5 wtppm or less. An object of the present invention is to decrease the specific resistance of a tungsten film sputter-deposited by using a tungsten sintered compact sputtering target by reducing a carbon content in the tungsten target.
    Type: Application
    Filed: February 27, 2013
    Publication date: January 22, 2015
    Inventors: Kazumasa Ohashi, Takeo Okabe
  • Publication number: 20130220805
    Abstract: Provided is a sputtering target-backing plate assembly wherein a Cu—Cr alloy backing plate is bonded to a Ti target via a layer of a strain absorbing material placed at an interface between the Ti target and the Cu—Cr alloy backing plate. In particular, the present invention relates to a sputtering target-backing plate assembly and a production method thereof, the assembly being capable of absorbing strain at the interface between the target and the backing plate in order to prevent deformation (displacement) during sputtering. An object of the present invention is to solve a problem inherent to Titanium (Ti) and a problem in selecting a backing plate compatible with it.
    Type: Application
    Filed: October 25, 2011
    Publication date: August 29, 2013
    Applicant: JX NIPPON MINING & METALS CORPORATION
    Inventors: Shiro Tsukamoto, Kazumasa Ohashi
  • Publication number: 20130032477
    Abstract: Provided is a Ni alloy sputtering target containing Pt in an amount of 5 to 30 at %, and one or more components selected from V, Al, Cr, Ti, Mo, and Si in a total amount of 1 to 5 at %, wherein the remainder is Ni and unavoidable impurities. The present invention is able to increase the low pass-through flux (PTF), which is a drawback of a Ni—Pt alloy having high magnetic permeability, increase the erosion area of the target which tends to be small as a result of the magnetic field lines being locally concentrated on the surface of the target during sputtering, and inhibit the difference between the portion where erosion is selectively advanced and the portion where erosion does not advance as much as the erosion progresses.
    Type: Application
    Filed: March 18, 2011
    Publication date: February 7, 2013
    Applicant: JX NIPPON MINING & METALS CORPORATION
    Inventors: Yasuhiro Yamakoshi, Kazumasa Ohashi
  • Patent number: 6226953
    Abstract: A weather strip retainer includes a first pillar mount section, a roof mount section, a center pillar mount section, and a drip molding integrally formed on the front pillar mount section and the roof mount section. The roof mount section and the center pillar mount section extends continuously. The center pillar mount section is oriented in a generally vertical direction by bending a boundary zone portion between the roof mount section and the center pillar mount section.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: May 8, 2001
    Assignees: Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Katayama Kogyo Co., Ltd.
    Inventors: Akihiro Uno, Katsuhisa Ishihara, Kazumasa Ohashi