Patents by Inventor Donald J. Hunt

Donald J. Hunt 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).

  • Method for fabricating multi-layer thin film structure having a separation layer
    Patent number: 5534094
    Abstract: A method and apparatus for releasing a workpiece from a substrate including providing a substrate which is transparent to a predetermined wavelength of electromagnetic radiation; forming, on the substrate, a separation layer which degrades in response to the predetermined radiation; providing the workpiece on the separation layer; and directing the predetermined radiation at the separation layer through the transparent substrate so as to degrade the separation layer and to separate the workpiece from the substrate.
    Type: Grant
    Filed: September 29, 1994
    Date of Patent: July 9, 1996
    Assignee: IBM Corporation
    Inventors: Gnanalingam Arjavalingam, Alina Deutsch, Fuad E. Doany, Bruce K. Furman, Donald J. Hunt, Chandrasekhar Narayan, Modest M. Oprysko, Sampath Purushothaman, Vincent Ranieri, Stephen Renick, Jane M. Shaw, Janusz S. Wilczynski, David F. Witman
  • Multi-layer thin film structure and parallel processing method for fabricating same
    Patent number: 5258236
    Abstract: A method and apparatus for releasing a workpiece from a substrate including providing a substrate which is transparent to a predetermined wavelength of electromagnetic radiation; forming, on the substrate, a separation layer which degrades in response to the predetermined radiation; providing the workpiece on the separation layer; and directing the predetermined radiation at the separation layer through the transparent substrate so as to degrade the separation layer and to separate the workpiece from the substrate.
    Type: Grant
    Filed: May 3, 1991
    Date of Patent: November 2, 1993
    Assignee: IBM Corporation
    Inventors: Gnanalingam Arjavalingam, Alina Deutsch, Fuad E. Doany, Bruce K. Furman, Donald J. Hunt, Chandrasekhar Narayan, Modest M. Oprysko, Sampath Purushothaman, Vincent Ranieri, Stephen Renick, Jane M. Shaw, Janusz S. Wilczynski, David F. Witman
  • Strengthening a ceramic by post sinter coating with a compressive surface layer
    Patent number: 4781970
    Abstract: Strengthened ceramic and a method for increasing the mechanical strength of fully sintered ceramic articles, in particular alumina type ceramic and glass-ceramic articles. Such articles are strengthened by forming a compresssive material layer of amorphous silicon dioxide or refractory metal nitride on the surface of the article to be strengthened.
    Type: Grant
    Filed: July 15, 1987
    Date of Patent: November 1, 1988
    Assignee: International Business Machines Corporation
    Inventors: Steven G. Barbee, Hung-Chang Huang, Donald J. Hunt, Jungihl Kim, Jae M. Park, Charles H. Perry, Da-Yuan Shih