Patents by Inventor David J. Brzozowy

David J. Brzozowy 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).

  • Novolak resins and their use in radiation-sensitive compositions wherein the novolak resins are made by condensing 2,6-dimethylphenol, 2,3-dimethylphenol, a para-substituted phenol and an aldehyde
    Patent number: 5346799
    Abstract: An alkali-soluble novolak binder resin made by the condensation reaction of a mixture of phenolic monomers with at least one aldehyde source, said phenolic monomers consisting of:(1) about 2-18% by weight of said mixture being 2,6-dimethylphenol;(2) about 55-75% by weight of said mixture being 2,3-dimethylphenol;(3) about 16-40% by weight of said mixture being a para-substituted lower alkyl phenol selected from the group consisting of 3,4-dimethylphenol, para-cresol, and para-cresol dimer;and the amount of said aldehyde source being at least a stoichiometric amount to react with all of said phenolic moieties. These novolak binder resins may be used in radiation-sensitive compositions useful as positive-working photoresists.
    Type: Grant
    Filed: December 7, 1992
    Date of Patent: September 13, 1994
    Assignee: OCG Microelectronic Materials, Inc.
    Inventors: Alfred T. Jeffries, III, David J. Brzozowy
  • Process of developing an image utilizing positive-working radiation sensitive mixtures containing alkali-soluble binder, o-quinonediazide photoactive compound and blankophor FBW actinic dye
    Patent number: 5284737
    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 absorbance increasing amount of BLANKOPHOR FBW actinic dye; 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: August 19, 1993
    Date of Patent: February 8, 1994
    Assignee: OCG Microelectronic Materials, Inc.
    Inventors: Tripunithura V. Jayaraman, David J. Brzozowy
  • Positive-working radiation sensitive mixtures and articles containing alkali-soluble binder, o-quinonediazide photoactive compound and BLANKOPHOR FBW acting dye
    Patent number: 5275909
    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 absorbance increasing amount of BLANKOPHOR FBW actinic dye; 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: June 1, 1992
    Date of Patent: January 4, 1994
    Assignee: OCG Microelectronic Materials, Inc.
    Inventors: Tripunithura V. Jayaraman, David J. Brzozowy