Patents by Inventor David M. Kolesar

David M. Kolesar 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).

  • Apparatus for forming a striation reduced chemical mechanical polishing pad
    Patent number: 7275928
    Abstract: The present invention provides an apparatus for forming a chemical mechanical polishing pad, comprising a tank with polymeric materials, a storage silo with microspheres and a curative storage tank with curing agents. The apparatus further provides a premix prep tank for forming a pre-mixture of the polymeric materials and the microspheres and a recirculation loop in the premix prep tank for recirculating the pre-mixture until a desired bulk density is reached. The apparatus further provides a premix run tank for storing the pre-mixture, a mixer for forming a mixture of the pre-mixture and the curing agents and a mold for molding the mixture.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: October 2, 2007
    Assignee: Rohm and Haas Electronic Materials CMP Holdings, Inc.
    Inventors: David M. Kolesar, Robert L. Post, Alan H. Saikin, Aaron Sarafinas