Patents by Inventor Evan George Colgan

Evan George Colgan 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).

  • Interconnect structure using Al.sub.2 -Cu for an integrated circuit chip
    Patent number: 5925933
    Abstract: An interconnect structure and method for an integrated circuit chip for resisting electromigration is described incorporating patterned interconnect layers of Al or Al--Cu and interlayer contact regions or studs of Al.sub.2 Cu between patterned interconnect layers. The invention overcomes the problem of electromigration at high current density in the interconnect structure by providing a continuous path for Cu and/or Al atoms to move in the interconnect structure.
    Type: Grant
    Filed: October 11, 1996
    Date of Patent: July 20, 1999
    Assignee: International Business Machines Corporation
    Inventors: Evan George Colgan, Kenneth Parker Rodbell, Paul Anthony Totta, James Francis White
  • Substrate structure and assembly method for reduced spatial light modulator size
    Patent number: 5818563
    Abstract: A spatial light modulator designed to use a minimum area on the surface of a silicon substrate. This invention comprises a silicon substrate on a back plate with a glass cover that is used to seal liquid crystal between the glass cover and the silicon substrate. Most importantly, the glue seal formed to contain the liquid crystal material is between the cover glass plate and the Si substrate on only one side and the back plate on the remaining three sides. This structure allows a smaller semiconductor substrate to be used.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: October 6, 1998
    Assignee: IBM Corporation
    Inventors: Evan George Colgan, Robert Lee Melcher, Teruhiro Nakasogi, Chandrasekhar Narayan, James Lawrence Sanford, Kei-Hsiung Yang
  • Reflective spatial light modulator array
    Patent number: 5706067
    Abstract: A reflective spatial light modulator array is described incorporating liquid crystal devices, mirrors, a semiconductor substrate, electrical circuits, and a reflector/absorber layer for blocking light. The invention overcomes the problem of shielding light from semiconductor devices, high optical throughput and contrast, pixel storage capacitance to hold the voltage across the liquid crystal device and precise control of the liquid crystal device thickness without spacers obscuring the mirrors.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: January 6, 1998
    Assignee: International Business Machines Corporation
    Inventors: Evan George Colgan, James Mckell Edwin Harper, Frank Benjamin Kaufman, Margaret Paggi Manny, Robert Lee Melcher, James Louis Speidell
  • Thin film multi-layer oxygen diffusion barrier consisting of aluminum on refractory metal
    Patent number: 5639316
    Abstract: The use of a bi-layer thin film structure consisting of aluminum or aluminide on a refractory metal layer as a diffusion barrier to oxygen penetration at high temperatures for preventing the electrical and mechanical degradation of the refractory metal for use in applications such as a capacitor electrode for high dielectric constant materials.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: June 17, 1997
    Assignee: International Business Machines Corp.
    Inventors: Cyril Cabral, Jr., Evan George Colgan, Alfred Grill