Patents by Inventor Noor U. Haq

Noor U. Haq 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: 5102777
    Abstract: A positive photoresist stripper composition includes a solvent system having solubility parameters which fall within a range from about 8.5 to about 15 in an amount which falls within a range from about 65% to about 98%. An amine is present in an amount which falls within a range from about 2% to about 25%. A fatty acid having 8 to 20 carbon atoms is present in an amount which falls within a range from about 0.1% to about 10% (all percents being by weight). The amount of the amine and of the fatty acid are selected to provide a pH which falls in a range from about 6 to about 9.5. Positive photoresist is stripped from a substrate by immersing the substrate in the aforementioned composition. Metal deposited on the substrate is not attached by the composition.
    Type: Grant
    Filed: February 1, 1990
    Date of Patent: April 7, 1992
    Assignee: Ardrox Inc.
    Inventors: Wei-Yuan Lin, Noor U. Haq, Dalton Chen