Patents by Inventor William F. Cordes, III

William F. Cordes, III 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).

  • Stepper process for VLSI circuit manufacture utilizing radiation absorbing dyestuff for registration of alignment markers and reticle
    Patent number: 4677043
    Abstract: The step-on-wafer process, also known as the step-and-repeat alignment process, for the production of very large scale integration (VLSI) microcircuitry with multi-layer interconnects, is greatly facilitated by incorporating, into at least the first layer of photoresist, a dyestuff which meets certain criteria the chief of which is that it be transparent to radiation to which the photoresist system is sensitive and that it absorb radiation of a wavelength to which the photoresist system is not sensitive. The use of photoresist systems in association with such dyestuffs has additional advantages. For example, the thickness of the photoresist layer deposited on a substrate can be checked prior to imaging without activating the photoresist.
    Type: Grant
    Filed: November 1, 1985
    Date of Patent: June 30, 1987
    Assignee: MacDermid, Incorporated
    Inventors: William F. Cordes, III, Edwin Turner
  • Antireflective coatings for use in the manufacture of semi-conductor devices, methods and solutions for making such coatings, and the method for using such coatings to absorb light in ultraviolet photolithography processes
    Patent number: 4617252
    Abstract: Disclosed are antireflective layers for use in the manufacture of semi-conductor devices, methods and solutions for making such antireflective layers, and the use of such antireflective layers to absorb light in ultraviolet photolithography. The antireflective layers that are utilized comprise a polyphenylquinoxaline.
    Type: Grant
    Filed: June 12, 1984
    Date of Patent: October 14, 1986
    Assignee: Philip A. Hunt Chemical Corporation
    Inventors: William F. Cordes, III, Alfred T. Jeffries, III
  • Production of vinyl halide polymers with dialkyl, hydroxy phenyl alkanoic ester of polyhydric alcohols
    Patent number: 4324874
    Abstract: The polymerization of a monomer component that comprises vinyl chloride in an aqueous medium in the presence of a free radical generating polymerization initiator is terminated by introducing into the polymerization reaction mixture when from 70% to 95% of the monomer component has been polymerized from 0.01% to 0.10% by weight, based on the weight of the monomer component, of a chain-terminating agent that is a dialkylhydroxyphenylalkanoic acid ester of a neopentyl polyhydric alcohol, such as pentaerythritol tetrakis-[3-(3,5-di-tert.butyl-4-hydroxyphenyl)propionate].
    Type: Grant
    Filed: October 8, 1980
    Date of Patent: April 13, 1982
    Assignee: Tenneco Chemicals, Inc.
    Inventors: William F. Cordes, III, Donald Goodman, Robert S. Miller
  • Polycarbonate stabilizers
    Patent number: 4076688
    Abstract: Polycarbonate is effectively stabilized against degradation by ultraviolet radiation by .alpha.-cyano-.beta.-(N-cyano-ethyl-p-methoxyanilino)acrylonitrile or .alpha.-cyano-.beta.-(N-methyl-p-ethoxyanilino)acrylonitrile.
    Type: Grant
    Filed: September 22, 1975
    Date of Patent: February 28, 1978
    Assignee: American Cyanamid Company
    Inventors: William F. Cordes, III, Robert E. Diehl
  • Ethyl .alpha.-cyano .beta.-(N-methyl-N-cyclohexylamino) acrylate stabilizer
    Patent number: 3970639
    Abstract: Polycarbonate is effectively stabilized against degradation by ultraviolet radiation by ethyl .alpha.-cyano-.beta.-(N-methyl-N-cyclohexylamino)acrylate.
    Type: Grant
    Filed: September 22, 1975
    Date of Patent: July 20, 1976
    Assignee: American Cyanamid Company
    Inventors: William F. Cordes, III, Robert E. Diehl