Patents Assigned to Exigent, Inc.
  • Publication number: 20050095865
    Abstract: The present invention is directed, in general, to a method of polishing a surface on substrates, such as semiconductor wafers and, more specifically, to a polishing pad suitable for this purpose. The polishing pad comprises a polishing body that includes a cross-linked polymer material, and may be incorporated into a polishing apparatus. Polishing includes positioning the substrate containing at least one layer against the polishing body and polishing the layer.
    Type: Application
    Filed: November 29, 2004
    Publication date: May 5, 2005
    Applicants: Exigent, Inc.
    Inventors: Yaw Obeng, Edward Yokley
  • Publication number: 20030077436
    Abstract: The present invention is directed, in general, to an improved material and method of planarizing a surface on a semiconductor wafer and, more specifically, to a method of altering the properties of polymers, preferably thermoplastic foam polymers, used in polishing applications. The chemical and mechanical properties thermoplastic foam substrates can be transformed by inorganic, inorganic-organic, and or organic-organic grafting techniques, such that the polymer foam is endowed with new set of properties that more desirable and suitable for polishing.
    Type: Application
    Filed: August 14, 2002
    Publication date: April 24, 2003
    Applicant: Exigent, Inc.
    Inventors: Yaw S. Obeng, Edward M. Yokley
  • Publication number: 20030035940
    Abstract: The present invention is directed, in general, to an improved material and method of planarizing a surface on a semiconductor wafer and, more specifically, to a method of altering the properties of polymers, preferably thermoplastic foam polymers, used in polishing applications. The chemical and mechanical properties thermoplastic foam substrates can be transformed by inorganic, inorganic-organic, and or organic-organic grafting techniques, such that the polymer foam is endowed with new set of properties that more desirable and suitable for polishing.
    Type: Application
    Filed: August 14, 2002
    Publication date: February 20, 2003
    Applicant: Exigent, Inc.
    Inventors: Yaw S. Obeng, Edward M. Yokley
  • Publication number: 20030021980
    Abstract: The present invention is directed, in general, to an improved material and method of planarizing a surface on a semiconductor wafer and, more specifically, to a method of altering the properties of polymers, preferably thermoplastic foam polymers, used in polishing applications. The chemical and mechanical properties thermoplastic foam substrates can be transformed by inorganic, inorganic-organic, and or organic-organic grafting techniques, such that the polymer foam is endowed with new set of properties that more desirable and suitable for polishing.
    Type: Application
    Filed: August 14, 2002
    Publication date: January 30, 2003
    Applicant: Exigent, Inc.
    Inventors: Yaw S. Obeng, Edward M. Yokley