Patents by Inventor Gu Xu

Gu Xu 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).

  • Publication number: 20030220431
    Abstract: New anti-reflective or fill compositions having improved flow properties are provided. The compositions comprise a styrene-allyl alcohol polymer and preferably at least one other polymer (e.g., cellulosic polymers) in addition to the styrene-allyl alcohol polymer. The inventive compositions can be used to protect contact or via holes from degradation during subsequent etching in the dual damascene process. The inventive compositions can also be applied to substrates (e.g., silicon wafers) to form anti-reflective coating layers having high etch rates which minimize or prevent reflection during subsequent photoresist exposure and developing.
    Type: Application
    Filed: May 23, 2002
    Publication date: November 27, 2003
    Inventors: Gu Xu, Jimmy D. Meador, Mandar R. Bhave, Shreeram V. Deshpande, Kelley A. Nowak
  • Publication number: 20020188034
    Abstract: New polymers, compositions comprising these polymers, and methods of using these compositions are provided. The polymers comprise styrene and maleic anhydride monomers with at least some of the maleic anhydride monomers having certain functional groups bonded thereto. Preferred functional groups include those derived from adhesion promoters (e.g., 2-aminophenol), photoinitiators (e.g., 4-aminoacetophenone), and solubilizers (e.g., 4-aminobenzoic acid). The polymers can be incorporated according to conventional processes into compositions which are then used to form a color filter to be used in a liquid crystal display. The final color filter has a high resolution, is highly resistant to solvents typically used in the color filter manufacturing process, is strongly adhered to the color filter substrate, has superior optical clarity, is highly soluble in a wide range of alkali developers, and has excellent heat and UV light stability.
    Type: Application
    Filed: June 7, 2002
    Publication date: December 12, 2002
    Inventors: Gu Xu, Dan W. Brewer, Timothy Limmer, Mike Stroder, Shelly Fowler, Jonathon Mayo
  • Publication number: 20020128342
    Abstract: New polymers, compositions comprising these polymers, and methods of using these compositions are provided. The polymers comprise styrene and maleic anhydride monomers with at least some of the maleic anhydride monomers having certain functional groups bonded thereto. Preferred functional groups include those derived from adhesion promoters (e.g., 2-aminophenol), photoinitiators (e.g., 4-aminoacetophenone), and solubilizers (e.g., 4-aminobenzoic acid). The polymers can be incorporated according to conventional processes into compositions which are then used to form a color filter to be used in a liquid crystal display. The final color filter has a high resolution, is highly resistant to solvents typically used in the color filter manufacturing process, is strongly adhered to the color filter substrate, has superior optical clarity, is highly soluble in a wide range of alkali developers, and has excellent heat and UV light stability.
    Type: Application
    Filed: February 25, 2002
    Publication date: September 12, 2002
    Inventors: Gu Xu, Dan W. Brewer, Timothy Limmer, Mike Stroder, Shelly Fowler, Jonathon Mayo
  • Patent number: 6156479
    Abstract: Anti-reflective coating compositions having improved etch rate, inter alia, are prepared from certain acrylic polymers and copolymers, such as, glycidyl methacrylate reacted with non-polycyclic carboxylic acid dyes and non-polycyclic phenolic dyes, all light absorbing at a wavelength of 193 nm.
    Type: Grant
    Filed: March 22, 1999
    Date of Patent: December 5, 2000
    Assignee: Brewer Science, Inc.
    Inventors: Jim D. Meador, Kelly A. Nowak, Gu Xu