Patents by Inventor Sueyosi Tanaka

Sueyosi Tanaka 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).

  • Method for producing a tablet for resin-molding semiconductor devices and resin-molding method making use of the tablet
    Patent number: 4963307
    Abstract: A resin-molding tablet for use in resin-molding semiconductor devices has a tablet body formed of powdered or particulate resin. The particles of the resin are compacted such as to form voids between adjacent particles. At least the outer peripheral region of the tablet is fused such that the resin particles are welded together to form a continuous layer of fine and impervious structure substantially free of open pores. The internal air trapped in the voids of the tablet is drawn and removed before the tablet is fused so that the tablet is substantially free of air. The tablet is produced by placing a particulate or powdered resin material in a vacuum vessel so as to allow the internal air in the resin material to be drawn outside, and then applying pressure and heat to the resin material so that at least the peripheral region of the mass of the particulate resin is fused to weld together.
    Type: Grant
    Filed: November 16, 1988
    Date of Patent: October 16, 1990
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kunito Sakai, Sueyosi Tanaka, Yasutugu Tutumi, Yutaka Morita
  • Tablet for resin-molding semiconductor devices
    Patent number: 4826931
    Abstract: A resin-molding tablet for use in resin-molding semiconductor devices has a tablet body formed of powdered or particulate resin. The particles of the resin are compacted such as to form voids between adjacent particles. At least the outer peripheral region of the tablet is fused such that the resin particles are welded together to form a continuous layer of fine and impervious structure substantially free of open pores. The internal air trapped in the voids of the tablet is drawn and removed before the tablet is fused so that the tablet is substantially free of air. The tablet is produced by placing a particulate or powdered resin material in a vacuum vessel so as to allow the internal air in the resin material to be drawn outside, and then applying pressure and heat to the resin material so that at least the peripheral region of the mass of the particulate resin is fused to weld together.
    Type: Grant
    Filed: October 9, 1987
    Date of Patent: May 2, 1989
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kunito Sakai, Sueyosi Tanaka, Yasutugu Tutumi, Yutaka Morita