Patents Represented by Attorney D. N. S. Hartman
  • Patent number: 4916115
    Abstract: Fine line superconductors of yttrium-barium-copper were formed on <100> strontium titanate substrates by the completely non-vacuum techniques of metallo-organic deposition in selective laser pyrolysis. Lines 125 micrometers wide were written in a film of metal neodecanoates, using an argon laser, prior to complete pyrolysis. An organic dye which absorbs selective laser light wavelengths, is added to the metallo-organic solution comprising the metal neodecanoates prior to laser exposure, so as to enhance absorption of the laser light at the regions of the metallo-organic film which are subsequently exposed to the laser light. The increased light absorbance at the exposed regions, results in at least partial pyrolysis of the exposed metal neodecanoates. Regions of the metallo-organic film not exposed to laser pyrolysis is developed away using a xylene wash.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: April 10, 1990
    Assignee: General Motors Corporation
    Inventors: Joseph V. Mantese, Antonio B. Catalan, Jeffrey A. Sell, Martin S. Meyer, Andrew M. Mance