Patents by Inventor John A. McFarland, Jr.

John A. McFarland, Jr. 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).

  • Polylactide compounds as sensitivity enhancers for radiation sensitive mixtures containing o-quinonediazide photoactive compounds
    Patent number: 5234789
    Abstract: A radiation-sensitive composition comprising an admixture in a solvent of: at least one alkali-soluble binder resin, at least one photoactive compound and an effective sensitivity enhancing amount of at least one polylactide compound; the amount of said binder resin being about 60 to 95% by weight, the amount of said photoactive component being about 5% to about 40% by weight, based on the total solids content of said radiation-sensitive composition.
    Type: Grant
    Filed: March 19, 1992
    Date of Patent: August 10, 1993
    Assignee: OCG Microelectronic Materials, Inc.
    Inventors: James G. Favier, Jr., Lawrence Ferreira, John A. McFarland, Jr.