Patents by Inventor Catherine A. Lotsko

Catherine A. Lotsko 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).

  • Phenyl-endcapped depolymerizable polymer
    Patent number: 5147741
    Abstract: Phenyl-endcapped depolymerizable polymers are disclosed. The phenyl endcap eliminates the reactive terminal vinyl group resulting in increased depolymerization threshold temperatures and reduced residue after depolymerization. A multilevel metal lift-off process using the phenyl-endcapped polymers is disclosed. Additionally, the polymers are improved ceramic glass binder resins.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: September 15, 1992
    Assignee: International Business Machines Corporation
    Inventors: Constance J. Araps, Jon A. Casey, Renuka S. Divakaruni, Steven M. Kandetzke, Catherine A. Lotsko
  • Process for forming metal patterns wherein metal is deposited on a thermally depolymerizable polymer and selectively removed
    Patent number: 4539222
    Abstract: A process for forming a desired metal pattern on a substrate which comprises forming a mask of a thermally depolymerizable polymer on the substrate with a pattern of openings complementary to the desired metal pattern, blanket coating the substrate and the mask with a metal, heating to depolymerize the thermally depolymerizable polymer, and removing the thermally depolymerizable polymer and metal thereover in a mild solvent.
    Type: Grant
    Filed: November 30, 1983
    Date of Patent: September 3, 1985
    Assignee: International Business Machines Corporation
    Inventors: Herbert R. Anderson, Jr., Constance J. Araps, Catherine A. Lotsko
  • Dry process for forming metal patterns wherein metal is deposited on a depolymerizable polymer and selectively removed
    Patent number: 4456675
    Abstract: A process for forming a desired metal pattern on a substrate which comprises, forming a mask of a thermally depolymerizable polymer on the substrate with a pattern of openings complementary to the desired metal pattern, blanket coating the substrate and the mask with a metal, heating the substrate to depolymerize the depolymerizable polymer, cooling the surface of the metal to thereby delaminate the metal coated in areas where thermally depolymerizable polymer is present, removing the delaminated metal where necessary, and optionally plasma ashing the depolymerized polymer, if residue thereof remains, to remove the same from said substrate.
    Type: Grant
    Filed: July 26, 1983
    Date of Patent: June 26, 1984
    Assignee: International Business Machines Corporation
    Inventors: Herbert R. Anderson, Jr., Constance J. Araps, Catherine A. Lotsko