Patents by Inventor Shuhchung S. Chen

Shuhchung S. Chen 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).

  • High purity epoxy formulations for use as die attach adhesives
    Patent number: 4975221
    Abstract: This invention presents improved epoxy-based die attach adhesives which are of low viscosity, high ionic purity, and stable toward thermal cycling. This improvement is obtained by including in the formulation carboxy terminated polymers which are the reaction products of polyether diols with cyclic dianhydrides.
    Type: Grant
    Filed: May 12, 1989
    Date of Patent: December 4, 1990
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Shuhchung S. Chen, Jules E. Schoenberg, Song Park