Abstract: A semi-aqueous ethylene-vinyl alcohol coating composition that is a stable, homogeneous solution which is capable of being easily applied to a substrate to form a multi-layer structure at room temperature, by spray, rod, gravure, or other mechanical means. Upon evaporation of the volatile components, this coating solution leaves a clear, homogeneous film comprising EVOH. The film resists degradation and discoloration during the lifetime of the structure, and upon incineration or recycling does not evolve harmful acids into the environment.

Abstract: A layered clad laminate with universal center plane adapted for the manufacture of printed wiring board comprising an electrically conductive self-sustaining, integral metal center sheet having, in repetitive fashion, a series of predetermined patterns of punched or photochemically developed openings therein, said sheet being pressed between electrical insulating layers of resin impregnated reinforcing material, said layers being adhered to said sheet and to each other through said openings, and on each of the outer surfaces of said laminate and adhered thereto a layer of electrically conductive metal foil which is essentially uniform and imperforate.

Abstract: A novel laminate adapted for use in the manufacture of capacitors comprising layers of microthin pin-hole free electroformed copper bonded together by a thin layer of hardened dielectric material, said bonded surfaces of said microthin copper having first been treated to form thereon a superficial coating of cupric oxide, bonded to the outer surfaces of said microthin copper, layers of self-sustaining copper foil, the bonded surfaces of said copper foil having been passivated under reducing or cathodic conditions in an aqueous solution of chromic oxide to passivate the surface thereof and to render said copper foil peelably removable from said microthin copper.