Patents by Inventor Yeong S. Choi

Yeong S. Choi 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: 4950619
    Abstract: A high resistance load resistor in a static memory device and the method of fabricating such device is disclosed. The device is fabricated by depositing a first insulating oxide layer on a semiconductor substrate and depositing a first polysilicon layer on the first insulating oxide layer. The first polysilicon layer is etched to form a first polysilicon pad and a second polysilicon pad with the first polysilicon pad spaced apart from the second polysilicon pad. A second oxide layer is deposited on the first polysilicon layer and the first oxide layer. The second oxide layer is etched thereby shaping the second oxide island layer to be contiguously positioned on each of the first and second polysilicon pads and on the first oxide layer extending between the first and second polysilicon layers. The shaped second oxide island layer includes a sidewall in contact with the first oxide layer and extending from and in contact with each of the first and second polysilicon pads.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: August 21, 1990
    Assignee: Hyundai Electronics Industries Co., Ltd.
    Inventors: Hee K. Yoon, Yeong S. Choi, Yoon J. Lee