Patents Assigned to DuPont Air Products Nanomaterials LLC
  • Patent number: 6743267
    Abstract: Gel-free colloidal abrasive polishing compositions and associated methods for polishing (e.g., chemical mechanical polishing) are described. These abrasive polishing compositions are comprised of a surface-modified colloidal abrasive that has been modified with a boron-containing compound(s), such as boron surface-modified colloidal ceria or silica. These compositions are useful in chemical mechanical planarization (CMP) applications as well as in substrate polishing applications. These abrasive compositions are most often negatively-charged colloids, which remain as stable negatively-charged colloids even in acidic media.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: June 1, 2004
    Assignee: DuPont Air Products Nanomaterials LLC
    Inventors: Peter Jernakoff, Junaid Ahmed Siddiqui