Patents by Inventor Toshio Mimura

Toshio Mimura 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 pulling a single-crystal semiconductor
    Patent number: 5911823
    Abstract: A method for pulling a <110> single-crystal silicon aims at preventing the crystal from being cut in diameter-reducing and suppress the increase in cost due to the cut prevention to the minimum. In the step for forming a diameter-reduced portion performed prior to the step for growing a <110> single-crystal silicon by the Czochralski method, a magnetic field having a strength of 500 gauss or more is applied and while suppressing a melt surface vibration and temperature variation, the crystal diameter is reduced to 2.00 mm or smaller.
    Type: Grant
    Filed: December 10, 1996
    Date of Patent: June 15, 1999
    Assignee: Komatsu Electronics Metals Co., Ltd.
    Inventors: Kouji Sonoda, Toshio Mimura