Patents by Inventor Alexander A. Blain

Alexander A. Blain 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: 5223321
    Abstract: A tape for use in tape-automated-bonding of integrated circuits is disclosed. A series of interconnection arrays ("frames") are arranged along the tape, each array being formed by a number of interconnection beams 3. A terminal ("bump") 6 is located on each beam 3 for bonding to a respective interconnection pad 7 of an integrated circuit 8. Conventional bumps are made of gold-plated copper and have uneven and unyielding bonding surfaces which can fail to provide consistent bonds. The bumps 6 of the tape disclosed comprise a conductive material having a Vickers hardness number of 55 or less, and thus have a compliance which facilitates more even bonding. A method of producing the tape is also disclosed.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: June 29, 1993
    Assignee: British Telecommunications plc
    Inventors: F. Nihal Sinnadurai, David J. Small, Alexander A. Blain, Kenneth Cooper