Patents by Inventor Ryouji Nishihashi

Ryouji Nishihashi 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: 6972202
    Abstract: A method of testing a semiconductor device includes the steps of: positioning on a surface of a test jig a semiconductor wafer provided with the semiconductor device; dividing the semiconductor wafer into a plurality of semiconductor chips on the surface by dicing the semiconductor wafer; and, with the plurality of semiconductor chips positioned on the surface, testing an electrical characteristic of semiconductor device. Consequently, a method of testing a semiconductor device which can test an electrical characteristic with higher accuracy prior to an assembling step, can be provided.
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: December 6, 2005
    Assignee: Renesas Technology Corp.
    Inventors: Ryouji Nishihashi, Kunio Kobayashi
  • Publication number: 20040185585
    Abstract: A method of testing a semiconductor device includes the steps of: positioning on a surface of a test jig a semiconductor wafer provided with the semiconductor device; dividing the semiconductor wafer into a plurality of semiconductor chips on the surface by dicing the semiconductor wafer; and, with the plurality of semiconductor chips positioned on the surface, testing an electrical characteristic of semiconductor device.
    Type: Application
    Filed: September 3, 2003
    Publication date: September 23, 2004
    Applicant: RENESAS TECHNOLOGY CORP.
    Inventors: Ryouji Nishihashi, Kunio Kobayashi
  • Patent number: 4904934
    Abstract: A testing apparatus includes a turntable, a driving device for rotating the turntable by a predetermined angle, and a plurality of pallets symmetrically fixed on the turntable around a center of rotation of the turntable. Each pallet holds a plurality of semiconductor devices and has electrode patterns for connection to leads of the semiconductor devices. A tester for testing the semiconductor devices is electrically connected with the electrode patterns of one of the pallets located at a first position in the rotation of the turntable by a connecting device. An exchanging device exchanges the semiconductor devices for new ones on one of the pallets located at a second position in the rotation of the turntable. A cover covers the turntable except around the second position. A heating device heats the inside of the cover to maintain the semiconductor devices held on the pallets in the cover at a high temperature.
    Type: Grant
    Filed: October 19, 1988
    Date of Patent: February 27, 1990
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Ryouji Nishihashi, Kiyoji Imanaka, Katsuji Kawaguchi, Hidekazu Iwasaki