Patents by Inventor Hitoshi Narushima

Hitoshi Narushima 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: 6426138
    Abstract: The present invention provides an adhesive film for electronic parts, for example, an adhesive agent in a tape BGA (Ball Grid Array) or &mgr;-BGA (trade name) package, in which embedding and adhesion to copper patterns on circuit boards are excellent, in which feeding and punching quality in the film state are superior, and which can reduce stress caused by thermal expansion difference between a circuit board and a reinforcing metal board or an IC chip. Adhesive film for electronic parts comprises a resin layer in which the dynamic modulus of elasticity at −30 to 125° C. is from 1 to 30 MPa and adhesive layers are coated on surfaces of the resin layer.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: July 30, 2002
    Assignee: Tomoegawa Paper Co., Ltd.
    Inventors: Hitoshi Narushima, Toshihiro Nakajima
  • Patent number: 6329050
    Abstract: The invention provides an adhesive for electronic parts, which satisfies both points of heat resistance and the ability to form an adhesive layer, and of low-temperature adhesive property, and an adhesive tape for electronic parts making use of such an adhesive. The adhesive comprises, as a resin component, two polyimide resins different in glass transition temperature by at least 20° C. from each other, and an epoxy resin.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: December 11, 2001
    Assignee: Tomoegawa Paper Co., Ltd.
    Inventors: Ken Yoshioka, Hitoshi Narushima, Osamu Oka
  • Patent number: 6187874
    Abstract: The invention provides an adhesive for electronic parts, which satisfies both points of heat resistance and the ability to form an adhesive layer, and of low-temperature adhesive property, and an adhesive tape for electronic parts making use of such an adhesive. The adhesive comprises, as a resin component, two polyimide resins different in glass transition temperature by at least 20° C. from each other, and an epoxy resin.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: February 13, 2001
    Assignee: Tomoegawa Paper Co., Ltd.
    Inventors: Ken Yoshioka, Hitoshi Narushima, Osamu Oka
  • Patent number: 5945188
    Abstract: An adhesive tape for TAB having an organic insulating film, an adhesive layer formed on the organic insulating film and a protection layer formed on the adhesive layer, the adhesive layer being any one of a layer containing a polyamide resin having an amine value of at least 3 and an epoxy resin, a layer containing a polyamide resin and a powdery inorganic filler, a layer containing an epoxy resin having a siloxane structure in its main chain, and a layer containing at least one maleimide compound.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: August 31, 1999
    Assignee: Tomoegawa Paper Co., Ltd.
    Inventors: Akinori Sei, Yoshikazu Tsukamoto, Takashi Shiozawa, Tadahiro Ohishi, Hitoshi Narushima
  • Patent number: 5786055
    Abstract: An adhesive for semiconductor device, comprising (a) a polyamide resin having an amine value of 20 to 60 and a weight average molecular weight of 1,000 to 5,000 and (b) a phenolic compound having a weight average molecular weight of 2,000 or less and having a skeleton containing at least 2 methylol groups.
    Type: Grant
    Filed: February 1, 1995
    Date of Patent: July 28, 1998
    Assignee: Tomoegawa Paper Co., Ltd.
    Inventors: Akinori Sei, Yoshikazu Tsukamoto, Takashi Shiozawa, Shouji Aoki, Tadahiro Oishi, Hitoshi Narushima
  • Patent number: 5523137
    Abstract: An adhesive tape for TAB having an organic insulating film, an adhesive layer formed on the organic insulating film and a protection layer formed on the adhesive layer, the adhesive layer being any one of a layer containing a polyamide resin having an amine value of at least 3 and an epoxy resin, a layer containing a polyamide resin and a powdery inorganic filler, a layer containing an epoxy resin having a siloxane structure in its main chain, and a layer containing at least one maleimide compound.
    Type: Grant
    Filed: March 23, 1994
    Date of Patent: June 4, 1996
    Assignee: Tomoegawa Paper Co., Ltd.
    Inventors: Akinori Sei, Yoshikazu Tsukamoto, Takashi Shiozawa, Tadahiro Ohishi, Hitoshi Narushima
  • Patent number: 5342895
    Abstract: Disclosed is a polyamide/polybutadiene/acrylonitrile block copolymer useful in a wide variety of applications, such as an adhesive film, which comprises a polycondensate comprising a polybutadiene/acrylonitrile copolymer having a carboxyl group at each terminal thereof and a polyamide having an aminoaryl group at each terminal, and which is represented by general formula (I) ##STR1## wherein R is a divalent organic group, Ar is a divalent aromatic group, x, y, z, m and n each: represent mean degree of polymerization and are integers in the ranges of x=3 to 7, y=1 to 4, z=5 to 15, n=1 to 30, and nm=2 to 20, respectively.
    Type: Grant
    Filed: January 28, 1993
    Date of Patent: August 30, 1994
    Assignee: Tomoegawa Paper Co., Ltd.
    Inventors: Toshio Tagami, Yoshio Imai, Masaaki Kakimoto, Osamu Kiyohara, Hitoshi Narushima
  • Patent number: 5298304
    Abstract: This invention relates to an adhesive tape for tape automated bonding (TAB). A first type of the adhesive tape for TAB according to the invention has a protective film and an adhesive layer laminated on an organic-insulating film. This adhesive layer is characterized by comprising at least resol-type phenol resin and polyamide resin, wherein from 2 to 35% of said resol-type resin is contained in the adhesive layer. A second type of the adhesive tape for TAB according to the invention has a protective film and an adhesive layer laminated on an organic-insulating film. This adhesive layer is characterized by having at least two layers: one comprising at least polyamide resin and being laminated on one surface of said organic-insulating film and; other comprising at least polyamide resin and resol-type resin and being laminated on other surface of said protective film.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: March 29, 1994
    Assignee: Tomoegawa Paper Co., Ltd.
    Inventors: Hitoshi Narushima, Yoshikazu Tsukamoto, Tadahiro Oishi, Atsushi Koshimura
  • Patent number: 5290614
    Abstract: This invention relates to an adhesive tape for tape automated bonding (TAB). A first type of the adhesive tape for TAB according to the invention has a protective film and an adhesive layer laminated on an organic-insulating film. This adhesive layer is characterized by comprising at least resol-type phenol resin and polyamide resin, wherein from 2 to 35% of said resol-type resin is contained in the adhesive layer. A second type of the adhesive tape for TAB according to the invention has a protective film and an adhesive layer laminated on an organic-insulating film. This adhesive layer is characterized by having at least two layers: one comprising at least polyamide resin and being laminated on one surface of said organic-insulating film and; other comprising at least polyamide resin and resol-type resin and being laminated on other surface of said protective film.
    Type: Grant
    Filed: September 20, 1991
    Date of Patent: March 1, 1994
    Assignee: Tomoegawa Paper Co., Ltd.
    Inventors: Hitoshi Narushima, Yoshikazu Tsukamoto, Tadahiro Oishi, Atsushi Koshimura