Patents by Inventor Paul K. Tom

Paul K. Tom 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 clad epoxy printed circuit board suitable for microwave frequencies encountered in GPS receivers
    Patent number: 5268064
    Abstract: A method for making printed circuit boards comprises using double treated copper foils for all inside conductor layers of multilayer packages with substrates of alloys of epoxy and polyphenylene oxide (PPO) resin to counteract the skin-effect encountered at high frequencies. Direct bonds between inside surfaces are then used without using an oxide step that introduces red/brown or black oxides.
    Type: Grant
    Filed: February 4, 1992
    Date of Patent: December 7, 1993
    Assignee: Trimble Navigation Limited
    Inventors: Arthur N. Woo, Paul K. Tom