Patents by Inventor Hikaru Okubo

Hikaru Okubo 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: 8853312
    Abstract: A quick curing resin composition, which can be used in conventionally used ovens, and a semiconductor device, which is excellent in reliability such as solder crack resistance or the like when the resin composition, is used as a die attach material for semiconductor. The resin composition has a sufficient low stress property, good adhesion and excellent bleeding property. The resin composition includes a filler (A), compound (B) having the structure represented by the formula (1) and a functional group represented by the formula (2) and a thermal radical initiator (C), and substantially not containing a photo polymerization initiator.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: October 7, 2014
    Assignee: Sumitomo Bakelite Co., Ltd
    Inventors: Hikaru Okubo, Nobuki Tanaka, Itaru Watanabe
  • Patent number: 8614270
    Abstract: A resin composition which is excellent in quick curing and can be used for curing in conventionally used ovens, and a semiconductor device which is excellent in reliability such as solder crack resistance or the like when the resin composition is used as a die attach material for semiconductor. Further preferably, a resin composition which has a sufficient low stress property, good adhesion and excellent bleeding property. A resin composition comprising a filler (A), the compound (B) comprising a structure represented by the formula (1) and a functional group represented by the formula (2) and a thermal radical initiator (C), and substantially not containing a photo polymerization initiator.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: December 24, 2013
    Assignee: Sumitomo Bakelite Company, Ltd.
    Inventors: Hikaru Okubo, Nobuki Tanaka, Itaru Watanabe
  • Patent number: 8217115
    Abstract: A liquid resin composition of the present invention is a liquid resin composition for bonding a semiconductor element on a support, exhibiting a tackiness of 0.05 N or less after heating at 120° C. for 10 min and a tackiness of 1 N or more at 80° C. A semiconductor wafer having an adhesive layer of the present invention is a semiconductor wafer having an adhesive layer in which the adhesive layer is formed from the above liquid resin composition. A process for manufacturing a semiconductor element of the present invention has the application step of applying an adhesive as a liquid resin composition containing a thermosetting resin and a solvent to one side of a wafer; the evaporation step of evaporating said solvent while substantially maintaining a molecular weight of said liquid resin composition to form an adhesive layer; the bonding step of bonding a dicing sheet on one side of said wafer; and the cutting step of cutting said wafer into pieces.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: July 10, 2012
    Assignee: Sumitomo Bakelite Company, Ltd
    Inventors: Takeshi Masuda, Hikaru Okubo
  • Publication number: 20120068106
    Abstract: A resin composition which is excellent in quick curing and can be used for curing in conventionally used ovens, and a semiconductor device which is excellent in reliability such as solder crack resistance or the like when the resin composition is used as a die attach material for semiconductor. Further preferably, a resin composition which has a sufficient low stress property, good adhesion and excellent bleeding property. A resin composition comprising a filler (A), the compound (B) comprising a structure represented by the formula (1) and a functional group represented by the formula (2) and a thermal radical initiator (C), and substantially not containing a photo polymerization initiator.
    Type: Application
    Filed: November 30, 2011
    Publication date: March 22, 2012
    Applicant: SUMITOMO BAKELITE COMPANY, LTD.
    Inventors: Hikaru OKUBO, Nobuki Tanaka, Itaru Watanabe
  • Patent number: 8088308
    Abstract: A resin composition which is excellent in quick curing and can be used for curing in conventionally used ovens, and a semiconductor device which is excellent in reliability such as solder crack resistance or the like when the resin composition is used as a die attach material for semiconductor. Further preferably, a resin composition which has a sufficient low stress property, good adhesion and excellent bleeding property. A resin composition comprising a filler (A), the compound (B) comprising a structure represented by the formula (I) and a functional group represented by the formula (2) and a thermal radical initiator (C), and substantially not containing a photo polymerization initiator.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: January 3, 2012
    Assignee: Sumitomo Bakelite Company, Ltd.
    Inventors: Hikaru Okubo, Nobuki Tanaka, Itaru Watanabe
  • Publication number: 20100006998
    Abstract: A liquid resin composition of the present invention is a liquid resin composition for bonding a semiconductor element on a support, exhibiting a tackiness of 0.05 N or less after heating at 120° C. for 10 min and a tackiness of 1 N or more at 80° C. A semiconductor wafer having an adhesive layer of the present invention is a semiconductor wafer having an adhesive layer in which the adhesive layer is formed from the above liquid resin composition. A process for manufacturing a semiconductor element of the present invention has the application step of applying an adhesive as a liquid resin composition containing a thermosetting resin and a solvent to one side of a wafer; the evaporation step of evaporating said solvent while substantially maintaining a molecular weight of said liquid resin composition to form an adhesive layer; the bonding step of bonding a dicing sheet on one side of said wafer; and the cutting step of cutting said wafer into pieces.
    Type: Application
    Filed: October 30, 2007
    Publication date: January 14, 2010
    Inventors: Takeshi Masuda, Hikaru Okubo
  • Publication number: 20070213467
    Abstract: A resin composition which is excellent in quick curing and can be used for curing in conventionally used ovens, and a semiconductor device which is excellent in reliability such as solder crack resistance or the like when the resin composition is used as a die attach material for semiconductor. Further preferably, a resin composition which has a sufficient low stress property, good adhesion and excellent bleeding property. A resin composition comprising a filler (A), the compound (B) comprising a structure represented by the formula (1) and a functional group represented by the formula (2) and a thermal radical initiator (C), and substantially not containing a photo polymerization initiator.
    Type: Application
    Filed: March 16, 2005
    Publication date: September 13, 2007
    Inventors: Hikaru Okubo, Nobuki Tanaka, Itaru Watanabe
  • Patent number: 6861013
    Abstract: The present invention provides a die-attaching paste superior in solder cracking resistance, used for bonding of semiconductor chips. The present invention lies in a die-attaching paste comprising as essential components: (A) a hydrocarbon having a number-average molecular weight of 500 to 5,000 and at least one double bond in the molecule, or its derivative, (B) a reactive diluent, (C) a radical polymerization catalyst, and (D) a filler.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: March 1, 2005
    Assignee: Sumitomo Bakelite Company, Ltd.
    Inventors: Nobuki Tanaka, Hikaru Okubo, Ryuichi Murayama, Kazuto Onami, Tomohiro Kagimoto
  • Publication number: 20030146521
    Abstract: The present invention provides a die-attaching paste superior in solder cracking resistance, used for bonding of semiconductor chips.
    Type: Application
    Filed: September 25, 2002
    Publication date: August 7, 2003
    Inventors: Nobuki Tanaka, Hikaru Okubo, Ryuichi Murayama, Kazuto Onami, Tomohiro Kagimoto