Patents by Inventor Paulus F. Van Hal

Paulus F. Van Hal 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 of making a substrate of a ceramic material
    Patent number: 5635429
    Abstract: The invention relates to a substrate made from a novel type of ceramic material. This material comprises 44-47 at. % A1, 31-39 at. % O, 8-13 at. % C and 8-12 at. % N. Substrates made from this material exhibit a relatively high heat conductance, a relatively great strength and their coefficient of expansion is equal to that of Si. Consequently, the substrates in accordance with the invention are very suitable for use in the Si-semiconductor technology. The main component of the ceramic material of the substrates preferably corresponds to the formula Al.sub.28 O.sub.21 C.sub.6 N.sub.6. The invention also provides methods of manufacturing substrates and other mouldings from this material.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: June 3, 1997
    Assignee: U.S. Philips Corporation
    Inventors: Wilhelm A. Grogen, Marcellinus J. Kraan, Paulus F. Van Hal, Gijsbertus De With
  • Substrate of a ceramic material
    Patent number: 5571757
    Abstract: The invention relates to a substrate made from a novel type of ceramic material. This material comprises 44-47 at. % Al, 31-39 at. % O, 8-13 at. % C and 8-12 at. % N. Substrates made from this material exhibit a relatively high heat conductance, a relatively great strength and their coefficient of expansion is equal to that of Si. Consequently, the substrates in accordance with the invention are very suitable for use in the Si-semiconductor technology. The main component of the ceramic material of the substrates preferably corresponds to the formula Al.sub.28 O.sub.21 C.sub.6 N.sub.6. The invention also provides methods of manufacturing substrates and other mouldings from this material.
    Type: Grant
    Filed: December 7, 1995
    Date of Patent: November 5, 1996
    Assignee: U.S. Philips Corporation
    Inventors: Wihelm A. Groen, Marcellinus J. Kraan, Paulus F. Van Hal, Gijsbertus De With