Patents by Inventor Masahiro Hirosue

Masahiro Hirosue 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: 5394013
    Abstract: A bonding pad comprises a central film and a peripheral film. The peripheral film is formed around the central film, including a film formed at the same time as the central film, and being continuous with the central film. The level of the central film is made equal to or higher than the level of a protective film on the peripheral film by central film raising means. Therefore, even if the wire moves in a lateral direction when the tip of a wire is pressed against the central film, the tip of the wire does not collide with the protective film. Accordingly, it is possible to avoid the case where cracks are generated in the surface protecting film during wire bonding because of a lateral movement of the wire.
    Type: Grant
    Filed: September 22, 1993
    Date of Patent: February 28, 1995
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazutoshi Oku, Masahiro Hirosue
  • Patent number: 4722878
    Abstract: A photomask material comprising a transparent glass substrate, a polysilicon layer formed on the transparent glass substrate, a transition metal film formed on the polysilicon layer, the metal film being capable of being etched by means of the same dry etching process as that used for the polysilicon layer, and a protective polysilicon layer formed on the transition metal film.
    Type: Grant
    Filed: November 12, 1985
    Date of Patent: February 2, 1988
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yaichiro Watakabe, Kazuhiro Tanaka, Masahiro Hirosue