Patents by Inventor Noriko Tsutsu

Noriko Tsutsu 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 of evaluating a semiconductor device and an apparatus for performing the same
    Patent number: 5006717
    Abstract: A method and apparatus for evaluating the lifetime of a semiconductor device are disclosed. Luminescence of a predetermined wavelength which is emitted from an operating semiconductor device is detected. The luminescence of the predetermined wavelength is one which correlates with the degradation of the semiconductor device. Then, the image of detected luminescence of the predetermined wavelength is processed to determine the place of the degradation caused by hot carriers.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: April 9, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Noriko Tsutsu, Yoshiro Nakata, Hideya Esaki