Patents by Inventor James H. Rice

James H. Rice 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: 4892776
    Abstract: An improved circuit board material having a support layer, an electrical resistance layer and a conductive layer. The circuit board material has a resistance of at least about 500 ohms/square. The circuit board material is formed by electro-plating the electrical resistance layer on the conductive layer. The conductive layer is desirably activated prior to electro-deposition of the electrical resistance layer thereon. The conductive layer is activated by contacting with an activating agent such as benzotriazole electrolytic chromate and the like. A preferred electro-plating bath for electro-deposition of the electrical resistance layer comprises about 0.5 mole per liters nickel hypophosphite. The disclosed electro-plating bath functions at ambient temperatures and is effectively temperature independent. Circuit boards can be formed from the circuit board material through a process involving only two etching steps.
    Type: Grant
    Filed: September 2, 1987
    Date of Patent: January 9, 1990
    Assignee: Ohmega Electronics, Inc.
    Inventor: James H. Rice