Patents by Inventor Yoshiyuki Ohkura

Yoshiyuki Ohkura 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: 20170292212
    Abstract: Problem: To provide a method for manufacturing metal staple fibers that allows for the efficient manufacture of uniform metal staple fibers. Solution: A method for manufacturing metal staple fibers including a cutting step of cutting a metal fiber bundle coated with a fluorine-based polymer into a staple fiber bundle.
    Type: Application
    Filed: November 18, 2015
    Publication date: October 12, 2017
    Inventors: Yoshiyuki Ohkura, Nobuaki Ando
  • Patent number: 8772182
    Abstract: A semiconductor device manufacture method has the steps of: (a) coating a low dielectric constant low-level insulating film above a semiconductor substrate formed with a plurality of semiconductor elements; (b) processing the low-level insulating film to increase a mechanical strength of the low-level insulating film; (c) coating a low dielectric constant high-level insulating film above the low-level insulating film; and (d) forming a buried wiring including a wiring pattern in the high-level insulating film and a via conductor in the low-level insulating film. The low-level insulating film and high-level insulating film are made from the same material. The process of increasing the mechanical strength includes an ultraviolet ray irradiation process or a hydrogen plasma applying process.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: July 8, 2014
    Assignee: Fujitsu Semiconductor Limited
    Inventor: Yoshiyuki Ohkura
  • Patent number: 8716148
    Abstract: A semiconductor device manufacturing method includes forming an insulation film containing silicon, oxygen and carbon over a semiconductor substrate by chemical vapor deposition; making UV cure on the insulation film being heated at a temperature of 350° C. or below after the forming the insulation film; and making helium plasma processing on the insulation film after the UV cure.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: May 6, 2014
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Yoshiyuki Ohkura, Toshiki Mori
  • Publication number: 20110312191
    Abstract: A semiconductor device manufacturing method includes forming an insulation film containing silicon, oxygen and carbon over a semiconductor substrate by chemical vapor deposition; making UV cure on the insulation film being heated at a temperature of 350° C. or below after the forming the insulation film; and making helium plasma processing on the insulation film after the UV cure.
    Type: Application
    Filed: March 24, 2011
    Publication date: December 22, 2011
    Applicant: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Yoshiyuki Ohkura, Toshiki Mori
  • Publication number: 20100216303
    Abstract: A semiconductor device manufacture method has the steps of: (a) coating a low dielectric constant low-level insulating film above a semiconductor substrate formed with a plurality of semiconductor elements; (b) processing the low-level insulating film to increase a mechanical strength of the low-level insulating film; (c) coating a low dielectric constant high-level insulating film above the low-level insulating film; and (d) forming a buried wiring including a wiring pattern in the high-level insulating film and a via conductor in the low-level insulating film. The low-level insulating film and high-level insulating film are made from the same material. The process of increasing the mechanical strength includes an ultraviolet ray irradiation process or a hydrogen plasma applying process.
    Type: Application
    Filed: May 5, 2010
    Publication date: August 26, 2010
    Applicant: FUJITSU SEMICONDUCTOR LIMITED
    Inventor: Yoshiyuki Ohkura
  • Patent number: 7749897
    Abstract: A method of manufacturing a semiconductor device comprising a wiring structure that includes a vertical wiring section is disclosed. The method comprises a step of forming an interlayer insulation film made of a low dielectric constant material on a wiring layer, a step of forming a silicon oxide film by CVD using SiH4 gas and CO2 gas on the interlayer insulation film, a step of forming a chemically amplified resist film to cover the silicon oxide film, and a step of forming a first opening in a position on the chemically amplified resist film where the vertical wiring section is to be formed.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: July 6, 2010
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Ken Sugimoto, Yoshiyuki Ohkura, Hirofumi Watatani, Tamotsu Owada, Shunn-ichi Fukuyama
  • Publication number: 20100051324
    Abstract: An aspect of the present invention comprises a method of forming holes in a dielectric substrate comprising the steps of applying a layer of photoresist to a dielectric substrate, exposing portions of the photoresist to actinic radiation through a photomask to form a pattern in the photoresist for an array of holes to be etched in the substrate, developing the photoresist, etching the dielectric substrate to form an array of holes, each hole extending at least partially through the dielectric substrate, and removing the excess photoresist. Another aspect of the present invention is a method of simultaneously forming holes in a dielectric substrate some of which extend partially through the substrate and some of which extend completely through the substrate. Other aspects of the present invention are dielectric substrates formed using the methods of the invention.
    Type: Application
    Filed: June 20, 2006
    Publication date: March 4, 2010
    Inventors: Vincent Yong Chin Lee, Yi Liang Fu, Tatsunori Koyanagi, Yoshiyuki Ohkura, Masahiko Ito
  • Publication number: 20090321015
    Abstract: To provide an adhesive composition which can exhibit high adhesion to a circuit board and also has ability capable of releasing the connection to the circuit board connected and reconnecting the circuit board (repairing properties). An adhesive composition comprising: (i) one or more aromatic-group-containing polyhydroxy ether resins, (ii) a compound having an alkoxysilyl group and an imidazole group in the molecule, and (iii) organic particles, wherein the content of the organic particles is 50% by weight or more based on the weight of the adhesive composition.
    Type: Application
    Filed: June 18, 2007
    Publication date: December 31, 2009
    Inventors: Kohichiro Kawate, Hitoshi Yamaguchi, Noriko Kikuchi, Tomihiro Hara, Yoshiyuki Ohkura
  • Publication number: 20080305645
    Abstract: A method of manufacturing a semiconductor device comprising a wiring structure that includes a vertical wiring section is disclosed. The method comprises a step of forming an interlayer insulation film made of a low dielectric constant material on a wiring layer, a step of forming a silicon oxide film by CVD using SiH4 gas and CO2 gas on the interlayer insulation film, a step of forming a chemically amplified resist film to cover the silicon oxide film, and a step of forming a first opening in a position on the chemically amplified resist film where the vertical wiring section is to be formed.
    Type: Application
    Filed: July 18, 2008
    Publication date: December 11, 2008
    Applicant: FUJITSU LIMITED
    Inventors: Ken Sugimoto, Yoshiyuki Ohkura, Hirofumi Watatani, Tamotsu Owada, Shunn-ichi Fukuyama
  • Publication number: 20070246158
    Abstract: The present invention provides a wiring board capable of realizing electrical connectivity even with connection leads having a fine pitch of 100 ?m or less. The present invention relates to a wiring board with adhesive film comprising: a wiring board, in which the surface of a connection terminal portion on the end of a connection lead on the wiring board has a non-flat shape formed by a plating method; and, an adhesive film that covers the surface of the connection terminal portion and contains either a thermoplastic resin or a thermoplastic, thermosetting resin.
    Type: Application
    Filed: April 21, 2006
    Publication date: October 25, 2007
    Inventors: Hideo Yamazaki, Yoshiyuki Ohkura, Nathan Kreutter, Shoji Takeuchi
  • Publication number: 20070200235
    Abstract: A semiconductor device manufacture method has the steps of: (a) coating a low dielectric constant low-level insulating film above a semiconductor substrate formed with a plurality of semiconductor elements; (b) processing the low-level insulating film to increase a mechanical strength of the low-level insulating film; (c) coating a low dielectric constant high-level insulating film above the low-level insulating film; and (d) forming a buried wiring including a wiring pattern in the high-level insulating film and a via conductor in the low-level insulating film. The low-level insulating film and high-level insulating film are made from the same material. The process of increasing the mechanical strength includes an ultraviolet ray irradiation process or a hydrogen plasma applying process.
    Type: Application
    Filed: June 13, 2006
    Publication date: August 30, 2007
    Applicant: FUJITSU LIMITED
    Inventor: Yoshiyuki Ohkura
  • Publication number: 20070123035
    Abstract: A method of manufacturing a semiconductor device comprising a wiring structure that includes a vertical wiring section is disclosed. The method comprises a step of forming an interlayer insulation film made of a low dielectric constant material on a wiring layer, a step of forming a silicon oxide film by CVD using SiH4 gas and CO2 gas on the interlayer insulation film, a step of forming a chemically amplified resist film to cover the silicon oxide film, and a step of forming a first opening in a position on the chemically amplified resist film where the vertical wiring section is to be formed.
    Type: Application
    Filed: February 22, 2006
    Publication date: May 31, 2007
    Applicant: FUJITSU LIMITED
    Inventors: Ken Sugimoto, Yoshiyuki Ohkura, Hirofumi Watatani, Tamotsu Owada, Shunn-ichi Fukuyama
  • Publication number: 20060205193
    Abstract: The method for forming an SiC-based film comprises the step of generating NH3 plasma on the surface of a substrate 20 in a chamber to make NH3 plasma processing on the substrate 20, the step of removing reaction products containing nitrogen remaining in the chamber, and the step of forming an SiC film 34 on the substrate 20 by PECVD.
    Type: Application
    Filed: September 8, 2005
    Publication date: September 14, 2006
    Applicant: FUJITSU LIMITED
    Inventors: Ken Sugimoto, Yoshiyuki Ohkura, Hirofumi Watatani, Tamotsu Owada, Kengo Inoue
  • Patent number: 7041586
    Abstract: A semiconductor device includes a multilayer interconnection structure including an organic interlayer insulation film in which a conductor pattern is formed by a damascene process, wherein the organic interlayer insulation film carries thereon an organic spin-on-glass film.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: May 9, 2006
    Assignee: Fujitsu Limited
    Inventors: Hiroshi Kudo, Masanobu Ikeda, Kenichi Watanabe, Yoshiyuki Ohkura
  • Publication number: 20020151190
    Abstract: A semiconductor device includes a multilayer interconnection structure including an organic interlayer insulation film in which a conductor pattern is formed by a damascene process, wherein the organic interlayer insulation film carries thereon an organic spin-on-glass film.
    Type: Application
    Filed: March 26, 2002
    Publication date: October 17, 2002
    Applicant: FUJITSU LIMITED
    Inventors: Hiroshi Kudo, Masanobu Ikeda, Kenichi Watanabe, Yoshiyuki Ohkura
  • Patent number: 6417116
    Abstract: A semiconductor device includes a multilayer interconnection structure including an organic interlayer insulation film in which a conductor pattern is formed by a damascene process, wherein the organic interlayer insulation film carries thereon an organic spin-on-glass film.
    Type: Grant
    Filed: March 23, 1999
    Date of Patent: July 9, 2002
    Assignee: Fujitsu Limited
    Inventors: Hiroshi Kudo, Masanobu Ikeda, Kenichi Watanabe, Yoshiyuki Ohkura
  • Publication number: 20010044201
    Abstract: A semiconductor device includes a multilayer interconnection structure including an organic interlayer insulation film in which a conductor pattern is formed by a damascene process, wherein the organic interlayer insulation film carries thereon an organic spin-on-glass film.
    Type: Application
    Filed: March 23, 1999
    Publication date: November 22, 2001
    Inventors: HIROSHI KUDO, MASANOBU IKEDA, KENICHI WATANABE, YOSHIYUKI OHKURA
  • Patent number: 6218318
    Abstract: A semiconductor device includes a porous interlayer insulation film including therein a stacking of SiO2 particles having a diameter in the range between about 5 nm and about 50 nm and stacked so as to form a void between adjacent particles, wherein the interlayer insulation film has a porosity in the range between about 13% and about 42%.
    Type: Grant
    Filed: February 4, 1998
    Date of Patent: April 17, 2001
    Assignee: Fujitsu Limited
    Inventors: Yoshiyuki Ohkura, Hideki Harada
  • Patent number: 5976703
    Abstract: A material and a method for planarizing an uneven surface of a substrate, such as those used for making wiring boards and electronic devices and having broad patterns on their surfaces, are provided. The material is a polysilphenylenesiloxane or a copolymer of polysilphenylenesiloxane with an organosiloxane, and is applied to an uneven surface of a substrate, and then heated to be reflowed to thereby be formed into a planarized film or layer. The material allows a substrate containing wiring having a width of up to several hundred micrometers to be planarized.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: November 2, 1999
    Assignee: Fujitsu Limited
    Inventors: Yoshihiro Nakata, Shyun-ichi Fukuyama, Michiko Katayama, Joe Yamaguchi, Hideki Harada, Yoshiyuki Ohkura
  • Patent number: 5691237
    Abstract: A semiconductor substrate 11 having concavities and convexities in the upper surface, and silica particles (granular insulators) 15 provided in the concavities to planarize the entire upper surface of the semiconductor substrate 11 are included. First, the silica particles 15 are laid over an upper surface of a semiconductor substrate 11 to provide the granular insulators 15 in cavities in the upper surface of the semiconductor substrate 11, and the silica particles 15 provided on convexities on the upper surface of the semiconductor substrate 11 are removed, whereby the concavities 11 are buried with the silica particles 15 so as to improve global planarizarion.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: November 25, 1997
    Assignee: Fujitsu Limited
    Inventors: Yoshiyuki Ohkura, Hideki Harada, Tadasi Oshima