Patent ID: 7547849

Claim:
A laser light-activatable, platable, self supporting composite film comprising: A. a polymer binder selected from a group consisting of: epoxy resins, silica filled epoxy, bismaleimide resins, bismaleimide triazines, fluoropolymers, polyesters, polyphenylene oxide/polyphenylene ether resins, polybutadiene/polyisoprene crosslinkable resins (and copolymers), liquid crystal polymers, polyamides, cyanate esters, and combinations thereof, the polymer binder being present in an amount from 50 to 97 weight-percent of the total weight of the composite film; and B. a spinel crystal filler present in an amount from 3 to 50 weight-percent of the total weight of the polymer composite film; and C. wherein the polymer composite has a 400 nm to 1,000,000 nm light extinction coefficient from 0.05 to 0.6 per micron, wherein the spinel crystal filler is represented by a chemical formula AB 2 O 4 or BABO 4 , where A is a metal cation having a valence of 2 selected from a group consisting of cadmium, zinc, copper, cobalt, magnesium, tin, titanium, iron, aluminum, nickel, manganese, chromium, and combinations of two or more of these, and where B is a metal cation having a valence of 3 selected from a group consisting of cadmium, manganese, nickel, copper, cobalt, iron, tin, titanium, aluminum, chromium, and combinations of two or more of these, wherein the film is a self-supporting film.