Patent ID: 8323802

Claim:
A laser light activatable, platable, polyimide film comprising: A. a polyimide polymer present in an amount from 50 to 97 weight-percent of the total weight of the polyimide composite film, and B. a spinel crystal filler present in an amount from 3 to 50 weight-percent of the total weight of the polyimide composite film, wherein the polyimide film has a 400 nm to 1200 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 nickel, copper, cobalt, tin, 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, and wherein the polyimide film is a laser light activatable, platable, film.