Patents by Inventor Edward David Roberts

Edward David Roberts 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).

  • Positive-working electron resists
    Patent number: 3981985
    Abstract: A cross-linkable positive resist formed from mixtures of a copolymer of an olefinically unsaturated carboxylic acid and an olefinically unsaturated compound having no free acid group and a copolymer of olefinically unsaturated acid chloride and an olefinically unsaturated compound having no acid chloride group.
    Type: Grant
    Filed: December 12, 1973
    Date of Patent: September 21, 1976
    Assignee: U.S. Philips Corporation
    Inventor: Edward David Roberts
  • Method of providing a patterned layer of silicon-containing oxide on a substrate
    Patent number: 3969543
    Abstract: The invention relates to a method of providing a patterned silicon-containing oxide layer on a substrate, by providing a coating comprising a polymerizable siloxane material on the substrate, locally exposing the coating to radiation in accordance with the desired pattern, then developing the exposed coating and converting the siloxane material pattern into the patterned silicon-containing oxide layer.
    Type: Grant
    Filed: September 26, 1974
    Date of Patent: July 13, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Edward David Roberts, Jan Frederik Steggerda