Western Electric Company, Inc.

At&t Technologies, Inc.

Daniel J Shanefield

Fred W Verdi

Henry Yasuo Kumagai

Leonard J Olmer

A method of forming adherent metallized coatings on a substrate which is useful for the manufacture of printed circuit boards as well as other metal coated articles involves providing the substrate with a rubber-modified epoxy surface or coating, sputter etching at least 50 A. from the surface followed by vacuum depositing an adherent thin metal film of Cr, Ni, Ni-V alloy, Pt, Pd or Ti onto the substrate. Another metal layer is then provided over the adherent thin film.

Method of providing an adherent metal coating on an epoxy surface

A method for depositing aluminum films on a substrate comprises exposing the substrate to vapors of an aluminum hydride-trialkylamine complex and exposing the surface to ultraviolet light in the areas where aluminum deposition is desired.

Radiation-stimulated deposition of aluminum

Adherent metal coatings on rubber-modified epoxy resin surfaces

A method of electrolessly plating a substrate having a rubber-modified epoxy surface includes the steps of preheating the substrate and while still warm, sputter etching at least 50A. from its surface. The substrate is then vacuum metalized with an adhesion promoting metal film, coated with a catalytic layer and a metal is electrolessly deposited thereover.

Method for providing an adherent electroless metal coating on an epoxy

A printed circuit board is made from a substrate having a copper clad layer thereon by means of first providing spaced through-holes through the substrate, mechanically scrubbing the surface of the substrate and then sputter etching the surface of the substrate so as to remove at least 50A. thereof from the surface and then vacuum metallizing the through-holes subsequent to sputter etching without breaking the vacuum and then finally forming a circuit pattern on the substrate by usual subtractive techniques.

Growing community of inventors

Princeton, NJ, United States of America

Daniel J Shanefield