Patents by Inventor Patrick Houle

Patrick Houle 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).

  • Copper electroplating solutions and processes
    Patent number: 5252196
    Abstract: Compositions and processes for electrolytic plating. The compositions are characterized by critical amounts of one or more brightening and leveling agents. The compositions are particularly useful for plating through hole walls of printed circuit boards, including through holes having an aspect ratio equal or greater than about ten to one.
    Type: Grant
    Filed: December 5, 1991
    Date of Patent: October 12, 1993
    Assignee: Shipley Company Inc.
    Inventors: Wade Sonnenberg, Gordon Fisher, Roger F. Bernards, Patrick Houle
  • Method for analyzing organic additives in an electroplating bath
    Patent number: 5223118
    Abstract: A direct method of analyzing brighteners and levelers used in metal electroplating baths. The method is based on the differential adsorption of these additives on a working electrode during a sequence of steps prior to and during metal plating. The sensitivity of the method allows for the determination of both brightener and leveler in the same sample without cyclic processing.
    Type: Grant
    Filed: March 8, 1991
    Date of Patent: June 29, 1993
    Assignee: Shipley Company Inc.
    Inventors: Wade Sonnenberg, Roger Bernards, Patrick Houle, Gordon Fisher