Patents by Inventor Motohiro Yagi

Motohiro Yagi 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: 7709085
    Abstract: A thermosetting resin composition capable of providing a molding, such as a resin sheet, that excels in not only dielectric characteristics but also dimensional stability at high temperature and even after exposure to high temperature thermal history, exhibits little dimensional change by the thermal history, namely, exhibiting low linear expansion coefficient. There are further provided a resin sheet and resin sheet for insulated substrate produced from the thermosetting resin composition. In particular, there is provided a thermosetting resin composition comprising an epoxy resin of 100 to 2000 epoxy equivalent, an epoxy resin hardening agent consisting of a phenolated compound, and a layered silicate, and are further provided a resin sheet comprised of the thermosetting resin composition and a resin sheet for insulated substrate comprised of the resin sheet.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: May 4, 2010
    Assignee: Sekisui Chemical Co., Ltd.
    Inventors: Koichi Shibayama, Koji Yonezawa, Kazuyoshi Shiomi, Motohiro Yagi, Hidenobu Deguchi, Nobuhiro Goto
  • Patent number: 7682691
    Abstract: A resin composition, substrate material, sheet, laminated board, resin-bearing copper foil, copper-clad laminate, TAB tape, printed board, prepreg and adhesive sheet are provided which exhibit improved mechanical properties, dimensional stability, heat resistance and flame retardance, particularly high-temperature physical properties. The resin composition containing 100 parts by weight of a thermosetting resin and 0.1-65 parts by weight of a layered silicate inorganic compound, the resin composition having a mean linear expansion coefficient (?2) of up to 17×10?3 [° C.?1 ] over the temperature range from a temperature 10° C. higher than a glass transition temperature of the resin composition to a temperature 50° C. higher than the glass transition temperature of the resin composition.
    Type: Grant
    Filed: February 4, 2003
    Date of Patent: March 23, 2010
    Assignee: Sekisui Chemical Co., Ltd.
    Inventors: Kazunori Akaho, Koji Yonezawa, Motohiro Yagi, Akihiko Fujiwara, Koichi Shibayama, Hidenobu Deguchi
  • Publication number: 20080268237
    Abstract: It is an object of the invention to provide a material for insulating substrate, a printed board, a laminate, copper foil with resin, a copper-clad laminate, a polyimide film, a film for TAB and a prepreg, which are excellent in physical properties, dimensional stability, heat resistance, flame retardancy etc. and exhibit an excellent flame retardant effect particularly by a shape retention effect at the time of combustion The invention provides a material for insulating substrate, comprising 100 parts by weight of a thermoplastic resin or a mixture of a thermoplastic resin and a thermosetting resin and 0.1 to 100 parts by weight of a layered silicate.
    Type: Application
    Filed: June 30, 2008
    Publication date: October 30, 2008
    Applicant: Sekisui Chemical Co., Ltd.
    Inventors: Koji Yonezawa, Koichi Shibayama, Masao Fushimi, Hideyuki Takahashi, Koji Taniguchi, Motohiro Yagi
  • Publication number: 20080268257
    Abstract: It is an object of the invention to provide a material for -insulating substrate, a printed board, a laminate, copper foil with resin, a copper-clad laminate, a polyimide film, a film for TAB and a prepreg, which are excellent in physical properties, dimensional stability, heat resistance, flame retardancy etc. and exhibit an excellent flame retardant effect particularly by a shape retention effect at the time of combustion The invention provides a material for insulating substrate, comprising 100 parts by weight of a thermoplastic resin or a mixture of a thermoplastic resin and a thermosetting resin and 0.1 to 100 parts by weight of a layered silicate.
    Type: Application
    Filed: June 30, 2008
    Publication date: October 30, 2008
    Applicant: Sekisui Chemical Co., Ltd.
    Inventors: Koji Yonezawa, Koichi Shibayama, Masao Fushimi, Hideyuki Takahashi, Koji Taniguchi, Motohiro Yagi
  • Publication number: 20080233386
    Abstract: A thermosetting resin composition capable of providing a molding, such as a resin sheet, that excels in not only dielectric characteristics but also dimensional stability at high temperature and even after exposure to high temperature thermal history, exhibits little dimensional change by the thermal history, namely, exhibiting low linear expansion coefficient. There are further provided a resin sheet and resin sheet for insulated substrate produced from the thermosetting resin composition. In particular, there is provided a thermosetting resin composition comprising an epoxy resin of 100 to 2000 epoxy equivalent, an epoxy resin hardening agent consisting of a phenolated compound, and a layered silicate, and are further provided a resin sheet comprised of the thermosetting resin composition and a resin sheet for insulated substrate comprised of the resin sheet.
    Type: Application
    Filed: December 7, 2004
    Publication date: September 25, 2008
    Inventors: Koichi Shibayama, Koji Yonezawa, Kazuyoshi Shiomi, Motohiro Yagi, Hidenobu Deguchi, Nobuhiro Goto
  • Publication number: 20050107497
    Abstract: A resin composition, substrate material, sheet, laminated board, resin-bearing copper foil, copper-clad laminate, TAB tape, printed board, prepreg and adhesive sheet are provided which exhibit improved mechanical properties, dimensional stability, heat resistance and flame retardance, particularly high-temperature physical properties. A resin composition containing 100 parts by weight of a thermosetting resin and 0.1-65 parts by weight of an inorganic compound, the resin composition having a mean linear expansion coefficient (?2) of up to 17×10?3 [° C.?1] over the temperature range from a temperature 10° C. higher than a glass transition temperature of the resin composition to a temperature 50° C. higher than the glass transition temperature of the resin composition.
    Type: Application
    Filed: February 4, 2003
    Publication date: May 19, 2005
    Inventors: Kazunori Akaho, Koji Yonezawa, Motohiro Yagi, Akihiko Fujiwara, Koichi Shibayama, Hidenobu Deguchi
  • Publication number: 20040053061
    Abstract: It is an object of the invention to provide a material for insulating substrate, a printed board, a laminate, copper foil with resin, a copper-clad laminate, a polyimide film, a film for TAB and a prepreg, which are excellent in physical properties, dimensional stability, heat resistance, flame retardancy etc.
    Type: Application
    Filed: October 24, 2003
    Publication date: March 18, 2004
    Inventors: Koji Yonezawa, Koichi Shibayama, Masao Fushimi, Hideyuki Takahashi, Koji Taniguchi, Motohiro Yagi
  • Patent number: 6641912
    Abstract: An objective is to provide a pressure-sensitive adhesive composition which shows pressure-sensitive adhesive properties at ordinary temperature, has the ability to cure upon irradiation and after photocure exhibits improved bond strength relative to high-polarity adherends, such as PET, PVC and metals, and improved moist heat-resisting bond strength, a pressure-sensitive adhesive and a pressure-sensitive adhesive sheet obtained from the aforementioned pressure-sensitive adhesive composition. A photocurable pressure-sensitive adhesive composition containing a polyester resin having a glass transition temperature (Tg) of 25° C. or above, a cationically photopolymerizable compound and a cationic photoinitiator.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: November 4, 2003
    Assignee: Sekisui Chemical Co., Ltd.
    Inventors: Hideaki Ishizawa, Munehiro Hatai, Masakazu Nakata, Motohiro Yagi
  • Publication number: 20030040550
    Abstract: An objective is to provide a pressure-sensitive adhesive composition which shows pressure-sensitive adhesive properties at ordinary temperature, has the ability to cure upon irradiation and after photocure exhibits improved bond strength relative to high-polarity adherends, such as PET, PVC and metals, and improved moist heat-resisting bond strength, a pressure-sensitive adhesive and a pressure-sensitive adhesive sheet obtained from the aforementioned pressure-sensitive adhesive composition.
    Type: Application
    Filed: September 13, 2001
    Publication date: February 27, 2003
    Inventors: Hideaki Ishizawa, Munehiro Hatai, Masakazu Nakata, Motohiro Yagi