Patents by Inventor Maurice E. Needham

Maurice E. Needham 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).

  • Patent number: 4525246
    Abstract: An improved process for making a printed circuit board of the type comprising solder-rooted pads and a solder-coated internal wall of each hole in the circuit board. The new process comprises the step of masking over a dry film, e.g. an alkaline ink film, after copper plating and before solder plating. In one embodiment of the invention, a selectively-plated thin layer of solder to act as a resist except on the areas defined by hole pads and barrels but is wholly free of solder which can melt and cause solder-migration problems under the surface of the printed circuit board.
    Type: Grant
    Filed: June 24, 1982
    Date of Patent: June 25, 1985
    Assignee: Hadco Corporation
    Inventor: Maurice E. Needham