Patents Represented by Attorney Edward M. Fink

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  • Technique for using solder etch resist in generation of patterns on printed wiring boards
    Patent number: 3998677
    Abstract: A technique is described for the generation of a pattern on printed wiring boards bearing a layer of copper. The technique involves the use of a solder cream as an etch resist, the cream comprising a slurry of solder suspended in a curable resin flux. The use of the cream as an etch resist is similar to the use of either ink or solder plate for such purposes. However, the process described is far more economical than currently used techniques and provides a preferred alternative.
    Type: Grant
    Filed: November 21, 1974
    Date of Patent: December 21, 1976
    Assignees: Western Electric Company, Inc., Bell Telephone Laboratories, Incorporated
    Inventors: David Verne Anderson, Anthony John Cucinotta, Donald Lee Durand
  • Technique for growth of thin film lithium niobate by liquid phase epitaxy
    Patent number: 3998687
    Abstract: A liquid phase epitaxial growth technique for growing lithium niobate films on lithium tantalate substrates involves growth from a flux system based on either lithium borate, lithium tungstate, tungsten oxide or potassium tungstate. Optical waveguiding occurs in films grown from the described flux systems.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: December 21, 1976
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Albert Anthony Ballman, Ping King Tien
  • Technique for fabrication of foil electret
    Patent number: 3991321
    Abstract: A technique for the fabrication of thin film electrets designed for use in electroacoustic transducers involves depositing a thin film of titanium upon a perfluorinated foil and, subsequently, depositing a layer of gold thereon. The resultant structure evidences adhesion characteristics which are superior to those described heretofore for metallized foils and electrical characteristics comparable to those previously described.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: November 9, 1976
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Satya Pal Khanna