Patents by Inventor by Lesley A. Stacey, legal representative

by Lesley A. Stacey, legal representative 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).

  • Semi-conductor power device assembly and method of manufacture thereof
    Patent number: 4450471
    Abstract: A heat spreader has a thin ceramic layer plasma sprayed onto its lower surface which may be chamfered. The upper surface of the spreader is then plated with a thin nickel or gold layer and a semi-conductor power device is soldered to the latter. The spreader is then secured via the ceramic layer to a base material serving as a heat sink by a layer of epoxy resin loaded with silver particles. The thin ceramic layer electrically insulates the spreader from the base material but enables heat conduction therebetween. The application of the plasma sprayed ceramic layer to the spreader is easy and economical to effect.
    Type: Grant
    Filed: June 12, 1981
    Date of Patent: May 22, 1984
    Assignee: Lucas Industries Limited
    Inventors: Felicitas Wellhoefer, David W. Stacey, deceased, by Lesley A. Stacey, legal representative