Patents by Inventor Hidekazu Nishidai

Hidekazu Nishidai 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).

  • Semiconductor device
    Patent number: 7579805
    Abstract: A semiconductor device in which the lifetime of mounted components can be prolonged. A cooling system for controlling the temperature of a refrigerant through a heating section and a radiator is provided. The semiconductor device is connected to the cooling system and is cooled. A variation width (?T1) of temperature controlled by the cooling system through the heating section and the radiator is smaller than a temperature variation (?T2) of the refrigerant caused by variations in operating conditions of the semiconductor device (?T1??T2).
    Type: Grant
    Filed: January 26, 2004
    Date of Patent: August 25, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Saito, Katsuhiro Higuchi, Osamu Otsuka, Hidekazu Nishidai, Hiroshi Houzouji, Toshiaki Morita, Yoshimasa Takahashi, Toshiya Sato
  • Semiconductor Device
    Publication number: 20070215316
    Abstract: A semiconductor device in which the lifetime of mounted components can be prolonged. A cooling system for controlling the temperature of a refrigerant through a heating section (1) and a radiator (2) is provided. The semiconductor device (100) is connected to the cooling system and is cooled. A variation width (?T1) of temperature controlled by the cooling system through the heating section (1) and the radiator (2) is larger than a temperature variation (?T2) of the refrigerant caused by variations in operating conditions of the semiconductor device (100) (?T1>?T2).
    Type: Application
    Filed: January 26, 2004
    Publication date: September 20, 2007
    Applicant: Hitachi, Ltd.
    Inventors: Atsushi Saito, Katsuhiro Higuchi, Osamu Otsuka, Hidekazu Nishidai, Hiroshi Houzouji, Toshiaki Morita, Yoshimasa Takahashi, Toshiya Sato