Patents by Inventor Wesley D. Costas

Wesley D. Costas 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: 6679928
    Abstract: A polishing composition for polishing a semiconductor substrate has a pH of under 5.0 and comprises (a) a carboxylic acid polymer comprising polymerized unsaturated carboxylic acid monomers having a number average molecular weight of about 20,000 to 1,500,000 or blends of high and low number average molecular weight polymers of polymerized unsaturated carboxylic acid monomers, (b) 1 to 15% by weight of an oxidizing agent, (c) up to 3.0% by weight of abrasive particles, (d) 50-5,000 ppm (parts per million) of an inhibitor, (e) up to 3.0% by weight of a complexing agent, such as, malic acid, and (f) 0.1 to 5.0% by weight of a surfactant.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: January 20, 2004
    Assignee: Rodel Holdings, Inc.
    Inventors: Wesley D. Costas, Tirthankar Ghosh, Jinru Bian, Karel-Anne Valentine
  • Patent number: 6607424
    Abstract: A composition is provided which is useful for the polishing of a semiconductor wafer substrate comprising an organic polymer having a backbone comprised of at least 16 carbon atoms, the polymer having a plurality of moieties with affinity to surface groups on the semiconductor wafer surface. Another composition is provided which is useful for the polishing of a semiconductor wafer substrate comprising a surfactant having a carbon chain backbone comprised of at least 16 carbon atoms.
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: August 19, 2003
    Assignee: Rodel Holdings, Inc.
    Inventors: Wesley D. Costas, James Shen, Glenn C. Mandigo, Terence M. Thomas, Craig D. Lack, Ross E. Barker, II
  • Patent number: 6568997
    Abstract: This invention is directed to a polishing composition used for the chemical mechanical polishing of semiconductor wafers having a copper metal circuit. The composition has a pH of under 5.0 and comprises the following: (a) a water soluble carboxylic acid polymer comprising polymerized unsaturated carboxylic acid monomers having a number average molecular weight of about 20,000 to 1,500,000 or blends of high and low number average molecular weight polymers of polymerized unsaturated carboxylic acid monomers; (b) 1 to 15% by weight of an oxidizing agent, (c) up to 3.0% by weight of abrasive particles, (d) 50-5,000 ppm (parts per million) of an inhibitor, (e) up to 3.0% by weight of a complexing agent, such as, malic acid, and (f) 0.1 to 5.0% by weight of organic polymer particles, wherein the polymer of the organic polymer particles has a number average molecular weight of at least 500,000 determined by GPC (gel permeation chromatography) and a Tg (glass transition temperature) of at least 25° C.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: May 27, 2003
    Assignee: Rodel Holdings, Inc.
    Inventors: Wesley D. Costas, Craig D. Lack, Daniel A. Saucy
  • Publication number: 20020189169
    Abstract: A polishing composition for polishing a semiconductor substrate has a pH of under 5.
    Type: Application
    Filed: April 12, 2002
    Publication date: December 19, 2002
    Inventors: Wesley D. Costas, Tirthankar Ghosh, Jinru Bian, Karel-Anne Valentine
  • Publication number: 20020173241
    Abstract: This invention is directed to a polishing composition used for the chemical mechanical polishing of semiconductor wafers having a copper metal circuit. The composition has a pH of under 5.
    Type: Application
    Filed: April 5, 2001
    Publication date: November 21, 2002
    Inventors: Wesley D. Costas, Craig D. Lack, Daniel A. Saucy
  • Publication number: 20020173243
    Abstract: An aqueous polishing composition for chemical mechanical polishing to remove copper from a buffer material, the composition comprising, an oxidizing agent, a complexing agent, an inhibitor, a dishing reducing agent, and abrasive particles comprising organic polymer particles for clearing relatively soft copper from the buffer material by chemical mechanical polishing while minimizing dishing and avoiding removal of the buffer material.
    Type: Application
    Filed: January 23, 2002
    Publication date: November 21, 2002
    Inventors: Wesley D. Costas, Craig D. Lack, Daniel A. Saucy
  • Patent number: 6443812
    Abstract: A composition is provided which is useful for the polishing of a semiconductor wafer substrate comprising an organic polymer having a backbone comprised of at least 16 carbon atoms, the polymer having a plurality of moieties with affinity to surface groups on the semiconductor wafer surface. Another composition is provided which is useful for the polishing of a semiconductor wafer substrate comprising a surfactant having a carbon chain backbone comprised of at least 16 carbon atoms.
    Type: Grant
    Filed: August 8, 2000
    Date of Patent: September 3, 2002
    Assignee: Rodel Holdings Inc.
    Inventors: Wesley D. Costas, James Shen
  • Patent number: 6328634
    Abstract: This invention describes methods of polishing with pads useful in the manufacture of semiconductor devices or the like. These pads have an advantageous hydrophilic polishing material and have an innovative surface topography and texture which generally improves predictability and polishing performance. These pads provide exceptional performance when used for polishing in conjunction with a slurry in which the abrasive particles are stabilized by use of an amino alcohol. They are also useful when used with slurries comprising an organic polymer.
    Type: Grant
    Filed: May 10, 2000
    Date of Patent: December 11, 2001
    Assignee: Rodel Holdings Inc.
    Inventors: James Shen, Wesley D. Costas