Patents by Inventor Bruce S. Madsen

Bruce S. Madsen 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).

  • Additive processing electroless metal plating using aqueous photoresist
    Patent number: 4574031
    Abstract: In a method for making a printed circuit board employing an aqueous type photoresist and including etching of the substrate surface with chromic acid after application of the photoresist mask, chromium is washed from the surface with a reducing agent at a pH of .ltoreq.10.
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: March 4, 1986
    Assignee: AT&T Technologies, Inc.
    Inventors: John K. Dorey, II, James T. Huneke, Bruce S. Madsen, Theodore F. Schaaf
  • Stabilizing composition for a metal deposition process
    Patent number: 4192764
    Abstract: A method for depositing a metal on a surface is disclosed. The method comprises treating the surface with a sensitizing solution comprising at least a reducible salt of a non-noble metal and a radiation-sensitive reducing agent for the salt to form a sensitized surface. The sensitized surface is exposed to a source of light radiation to reduce the metal salt to a reduced metal salt species. Either or both of the preceding sensitizing or radiation exposing steps is restricted to a selected pattern on the surface to form a catalytic real image capable of directly catalyzing the deposition of a metal thereon from an electroless metal deposition solution. The catalytic real image is treated with a stabilizer comprising (a) a reducing agent for the non-noble metal ions of said reducible salt, (b) a complexing agent and (c) an accelerator to at least stabilize the catalytic real image.
    Type: Grant
    Filed: October 16, 1978
    Date of Patent: March 11, 1980
    Assignee: Western Electric Company, Inc.
    Inventor: Bruce S. Madsen
  • Method for depositing a metal on a surface
    Patent number: 4133908
    Abstract: A method for depositing a metal on a surface is disclosed. The method comprises treating the surface with a sensitizing solution comprising at least a reducible salt of a non-noble metal and a radiation-sensitive reducing agent for the salt to form a sensitized surface. The sensitized surface is exposed to a source of light radiation to reduce the metal salt to a reduced metal salt species. Either or both of the preceding sensitizing or radiation exposing steps is restricted to a selected pattern on the surface to form a catalytic real image capable of directly catalyzing the deposition of a metal thereon from an electroless metal deposition solution. The catalytic real image is treated with a stabilizer comprising (a) a reducing agent for the non-noble metal ions of said reducible salt, (b) a complexing agent and (c) an accelerator to at least stabilize the catalytic real image.
    Type: Grant
    Filed: November 3, 1977
    Date of Patent: January 9, 1979
    Assignee: Western Electric Company, Inc.
    Inventor: Bruce S. Madsen