Compositions useful in electronic circuitry type applications, patternable using amplified light, and methods and compositions relating thereto

A two-layer laser light-activatable, platable, self supporting composite film—having a top layer and a bottom layer, the top layer consisting essentially of:

• 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 top layer;
• and
• B. a spinel crystal filler present in an amount from 3 to 50 weight-percent based on the total weight of the top layer, and
• C. wherein the composite film 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 AB2O4 or BABO4, 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,
• and wherein the bottom layer comprises a functional layer.

A three-layer laser light-activatable, platable, self supporting composite film comprising two outer layers adjacent to an inner layer;

• the inner layer positioned between the two outer layers,
• wherein at least one of the outer layers comprises:
• 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 outer layer;
• and
• B. a spinel crystal filler present in an amount from 3 to 50 weight-percent based on the total weight of the outer layer, and
• C. wherein the composite film has a 400 nm to 1,000,000 nm light extinction coefficient of 0.05 to 0.6 per micron,
• wherein the spinel crystal filler is represented by a chemical formula AB2O4 or BABO4, 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;
• and wherein the inner layer comprises a functional layer.