Patents by Inventor Bakul P. Patel

Bakul P. Patel 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: 7456140
    Abstract: A composition for the stripping of photoresist and the cleaning of residues from substrates, and for silicon oxide etch, comprising from about 0.01 percent by weight to about 10 percent by weight of one or more fluoride compounds, from about 10 percent by weight to about 95% by weight of a sulfoxide or sulfone solvent, and from about 20 percent by weight to about 50 percent by weight water. The composition may contain corrosion inhibitors, chelating agents, co-solvents, basic amine compounds, surfactants, acids and bases.
    Type: Grant
    Filed: August 17, 2004
    Date of Patent: November 25, 2008
    Assignee: EKC Technology, Inc.
    Inventors: Robert J. Small, Bakul P. Patel, Wai Mun Lee, Douglas Holmes, Jerome Daviot, Chris Reid
  • Patent number: 7273060
    Abstract: The present invention relates to methods and compositions for treating a surface of a substrate by foam technology that includes at least one treatment chemical. The invention more particularly relates to the removal of undesired matter from the surface of substrates with small features, where such undesired matter may comprise organic and inorganic compounds such as particles, films from photoresist material, and traces of any other impurities such as metals deposited during planarization or etching. A method according to the present invention for treating a surface of a substrate comprises generating a foam from a liquid composition, wherein the liquid composition comprises a gas; a surfactant; and at least one component selected from the group consisting of a fluoride, a hydroxylamine, an amine and periodic acid; contacting the foam with the surface of a substrate; and, removing the undesired matter from the surface of the substrate.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: September 25, 2007
    Assignee: EKC Technology, Inc.
    Inventors: Bakul P. Patel, Mihaela Cernat, Robert J. Small
  • Patent number: 7144848
    Abstract: The present invention is directed to resist and etching residue removing compositions containing at least one nucleophilic amine compound possessing reduction and oxidation potentials, a two-carbon atom linkage alkanolamine compound, and optionally water and/or one or more corrosion inhibitors. The compositions may be substantially free of hydroxylamine, polar organic solvents, water, corrosion inhibitors, or a combination thereof. The compositions are useful in processes for removing resists and etching residue from metal or metal alloy substrates or substrate layers used in micro-circuitry fabrication.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: December 5, 2006
    Assignee: EKC Technology, Inc.
    Inventors: De-Ling Zhou, Jing Qiao, Shihying Lee, Bakul P. Patel, Becky Min Hon
  • Patent number: 6777380
    Abstract: A composition for the stripping of photoresist and the cleaning of residues from substrates, and for silicon oxide etch, comprising from about 0.01 percent by weight to about 10 percent by weight of one or more fluoride compounds, from about 10 percent by weight to about 95% by weight of a sulfoxide or sulfone solvent, and from about 20 percent by weight to about 50 percent by weight water. The composition may contain corrosion inhibitors, chelating agents, co-solvents, basic amine compounds, surfactants, acids and bases.
    Type: Grant
    Filed: July 10, 2001
    Date of Patent: August 17, 2004
    Assignee: EKC Technology, Inc.
    Inventors: Robert J. Small, Bakul P. Patel, Wai Mun Lee, Douglas Holmes, Jerome Daviot, Chris Reid
  • Publication number: 20040147420
    Abstract: The present invention is directed to resist and etching residue removing compositions containing at least one nucleophilic amine compound possessing reduction and oxidation potentials, a two-carbon atom linkage alkanolamine compound, and optionally water and/or one or more corrosion inhibitors. The compositions may be substantially free of hydroxylamine, polar organic solvents, water, corrosion inhibitors, or a combination thereof. The compositions are useful in processes for removing resists and etching residue from metal or metal alloy substrates or substrate layers used in micro-circuitry fabrication.
    Type: Application
    Filed: October 22, 2003
    Publication date: July 29, 2004
    Inventors: De-Ling Zhou, Jing Qiao, Shihying Lee, Bakul P. Patel, Becky Min Hon
  • Publication number: 20030171239
    Abstract: The present invention relates to methods and compositions for treating a surface of a substrate by foam technology that includes at least one treatment chemical. The invention more particularly relates to the removal of undesired matter from the surface of substrates with small features, where such undesired matter may comprise organic and inorganic compounds such as particles, films from photoresist material, and traces of any other impurities such as metals deposited during planarization or etching. A method according to the present invention for treating a surface of a substrate comprises generating a foam from a liquid composition, wherein the liquid composition comprises a gas; a surfactant; and at least one component selected from the group consisting of a fluoride, a hydroxylamine, an amine and periodic acid; contacting the foam with the surface of a substrate; and, removing the undesired matter from the surface of the substrate.
    Type: Application
    Filed: January 28, 2002
    Publication date: September 11, 2003
    Inventors: Bakul P. Patel, Mihaela Anca-Mac Cernat, Robert J. Small
  • Publication number: 20020037820
    Abstract: A composition for the stripping of photoresist and the cleaning of residues from substrates, and for silicon oxide etch, comprising from about 0.01 percent by weight to about 10 percent by weight of one or more fluoride compounds, from about 10 percent by weight to about 95% by weight of a sulfoxide or sulfone solvent, and from about 20 percent by weight to about 50 percent by weight water. The composition may contain corrosion inhibitors, chelating agents, co-solvents, basic amine compounds, surfactants, acids and bases.
    Type: Application
    Filed: July 10, 2001
    Publication date: March 28, 2002
    Applicant: EKC Technology, Inc.
    Inventors: Robert J. Small, Bakul P. Patel, Wai Mun Lee, Douglas Holmes, Jerome Daviot, Chris Reid
  • Patent number: 6235693
    Abstract: A composition for the cleaning of residues from substrates from about 0.01 percent by weight to about 10 percent by weight of one or more fluoride compounds, from about 20 percent by weight to about 50 percent by weight water, from about 20 percent by weight to about 80 percent by weight of an lactam solvent and from 0 to about 50 weight percent of an organic sulfoxide or glycol solvent. The composition has a pH between about 6 and about 10. Additionally, the composition optionally contains corrosion inhibitors, chelating agents, surfactants, acids and bases. In use of the composition, a substrate is contacted with the composition for a time and at a temperature that permits cleaning of the substrate.
    Type: Grant
    Filed: July 16, 1999
    Date of Patent: May 22, 2001
    Assignee: EKC Technology, Inc.
    Inventors: Jun Cheng, Robert J. Small, Bakul P. Patel