Patents by Inventor Philip Townsend

Philip Townsend 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).

  • Sintered backside shim in a press pack cassette
    Patent number: 9099316
    Abstract: Within a cassette of a press pack module, a conductive shim is bonded to the backside of a device die by a layer of sintered metal. The die, sintered metal, and shim together form a sintered assembly. The cassette is compressed between a metal top plate member and a metal bottom plate member such that the backside of the assembly is pressed against the top plate member, and such that the frontside of the assembly is pressed against another shim. A central portion of the frontside surface of the die is contacted on the bottom by the other shim, but there is no shim contacting a peripheral portion of the frontside surface. Despite there being no shim in contact with the peripheral portion of the frontside surface, the peripheral portion is in good thermal contact with the top plate member through the sintered metal and the bonded conductive shim.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: August 4, 2015
    Assignee: IXYS Corporation
    Inventors: Stefan Steinhoff, Philip Townsend
  • SINTERED BACKSIDE SHIM IN A PRESS PACK CASSETTE
    Publication number: 20150102481
    Abstract: Within a cassette of a press pack module, a conductive shim is bonded to the backside of a device die by a layer of sintered metal. The die, sintered metal, and shim together form a sintered assembly. The cassette is compressed between a metal top plate member and a metal bottom plate member such that the backside of the assembly is pressed against the top plate member, and such that the frontside of the assembly is pressed against another shim. A central portion of the frontside surface of the die is contacted on the bottom by the other shim, but there is no shim contacting a peripheral portion of the frontside surface. Despite there being no shim in contact with the peripheral portion of the frontside surface, the peripheral portion is in good thermal contact with the top plate member through the sintered metal and the bonded conductive shim.
    Type: Application
    Filed: October 15, 2013
    Publication date: April 16, 2015
    Applicant: IXYS CORPORATION
    Inventors: Stefan Steinhoff, Philip Townsend