Patents by Inventor Lyn B. Ratcliff

Lyn B. Ratcliff 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).

  • Apparatus for chemically etching substrates
    Patent number: 5614056
    Abstract: An apparatus for chemically etching the copper foil of a copper foil-clad substrate are disclosed. Significantly, this apparatus includes fluid jet injectors which serve to produce jets of chemical etchant. These fluid jet injectors are arranged so as to simultaneously achieve a relatively high etch rate and a relatively high etch uniformity.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: March 25, 1997
    Assignee: International Business Machines Corporation
    Inventors: Edward J. Frankoski, Jeffrey D. Jones, Robert H. Katyl, Lyn B. Ratcliff