Patents by Inventor Kwang D. Yoo

Kwang D. Yoo 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 manufacturing BICMOS devices
    Patent number: 5196356
    Abstract: A method for BICMOS devices is disclosed, wherein an emitter and a base of a vertical PNP transistor are self-aligned, an extrinsic base is formed by adapting a base electrode polysilicon layer as a diffusion source, and the base electrode and an intrinsic base are coupled by diffusion of N type impurities adapting the N.sup.+ polysilicon as a diffusion source, so that the manufacturing process is simplified and the resistance of the extrinsic base is reduced.
    Type: Grant
    Filed: April 27, 1992
    Date of Patent: March 23, 1993
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tae Y. Won, Moon H. Kim, Kwang D. Yoo, Ji H. Yoo