Coating processes – Measuring – testing – or indicating
Patent
1977-12-30
1979-05-15
Smith, John D.
Coating processes
Measuring, testing, or indicating
427140, 427142, 427304, 427305, 427306, 427430A, C23C 302
Patent
active
041548698
ABSTRACT:
Improvements are disclosed in the method of electroless deposition of a metal on a nonconductive surface wherein the surface is sequentially contacted with a tin salt solution, a palladium salt solution, and an electroless plating bath containing said metal. The improvement relates to preparing the surface to produce an unbroken layer of water adhering thereto upon dipping said surface in deionized water. The improvement further contemplates removing the surface from the electroless plating bath after formation of the visible amount of metal, inspecting the surface for imperfections, removing the metal, and recleaning the surface to remove imperfections. Finally, the activation steps are repeated followed by contacting the surface with an electroless plating bath to plate the desired quantity of metal thereon in a manner wherein uniformity and adhesion are improved.
REFERENCES:
patent: 3442683 (1969-05-01), Lenoble et al.
patent: 3639143 (1972-02-01), Lussow et al.
patent: 3798050 (1974-03-01), Franz
patent: 4002779 (1977-01-01), Nischwitz
patent: 4042730 (1977-08-01), Cohen et al.
patent: 4066809 (1978-01-01), Alpaugh et al.
patent: 4072772 (1978-02-01), Franz
Honeywell Inc.
Munday John S.
Smith John D.
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