Patents by Inventor Jeffrey Darken

Jeffrey Darken 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).

  • Treating laminates with a wetting/reducing solution after desmearing with permanganate
    Patent number: 4873122
    Abstract: An aqueous composition is provided for treating a laminate in the manufacture of a printed circuit board, the composition comprising a wetting agent, which has a positively charged quaternary nitrogen atom, and a reducing agent which is compatible with the wetting agent. Preferably the reducing agent is hydroxylamine or one or more of its salts, but oxalic acid or one or more oxalates may, alternatively or as well, be used. The compatibility of the wetting and reducing agents enables the number of process steps to be reduced.
    Type: Grant
    Filed: May 27, 1987
    Date of Patent: October 10, 1989
    Assignee: OMI International Corporation
    Inventor: Jeffrey Darken
  • Formaldehyde-free autocatalytic electroless copper plating
    Patent number: 4617205
    Abstract: Copper may be deposited non-electrolytically from a composition comprising copper ions, a complexor to keep the copper ions in solution, and glyoxylate ions as a reducing agent. The use of formaldehyde is therefore avoided.
    Type: Grant
    Filed: December 17, 1985
    Date of Patent: October 14, 1986
    Assignee: OMI International Corporation
    Inventor: Jeffrey Darken