Patents by Inventor Catherine C. Meister

Catherine C. Meister 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).

  • Photoresist with photoactive compound mixtures
    Patent number: 5723254
    Abstract: The invention relates to a positive-acting photoresist composition containing a mixture of photoactive compounds. One component of the mixture is the esterification product of an o-quinonediazide sulfonyl compound with a phenolic resin. Another component of the mixture is the esterification product of an o-quinonediazide sulfonyl compound with a low molecular weight phenol having from one to three aryl groups and from one to three hydroxyl groups. A third photoactive component which may be present in the formulation is the esterification product of an o-quinonediazide sulfonyl compound with a relative high molecular weight, polyhydric, polynuclear phenol.
    Type: Grant
    Filed: September 4, 1996
    Date of Patent: March 3, 1998
    Assignee: Shipley Company, L.L.C.
    Inventors: Anthony Zampini, Peter Trefonas, III, Pamela Turci, Catherine C. Meister, Gerald C. Vizvary