Patent ID: 8603590
Filing Date: 2013-12-10
Classification: C23C,H05K

Abstract:
1. A method of embedding at least one layer of at least one metal trace in a silicone containing polymer, comprising the steps of: providing a substrate; applying an anti-adherent agent that adheres to said substrate; applying a first silicone containing polymer layer having a surface area on said anti-adherent agent, where said agent adheres less to said first silicone containing polymer layer than said substrate; first irradiating said surface area of said first silicone containing polymer layer with a first ultraviolet light beam emitted by an excimer laser at a wavelength below 200 nm to ablate said surface area; creating cuts, grooves, blind holes or vias, having a second surface area formed by said first irradiating below 200 nm with said first ultraviolet light beam; second irradiating said second surface area of said first silicone containing polymer layer with a second ultraviolet light beam emitted by an excimer laser at a wavelength between 308 and 350 nm; creating an irradiated surface by said second irradiating between 308 and 350 nm; immersing said irradiated surface of said first silicone containing polymer layer in an autocatalytic bath containing metal ions of at least one metal and metallizing said irradiated surface area of said first silicone containing polymer layer on said second surface forming metal traces embedded in said first silicone containing polymer layer; thermally treating said metallized first silicone containing polymer layer to induce diffusion of metal from the metallizing into said first silicone containing polymer layer; applying a second silicone containing polymer layer on said thermally treated metallized first silicone containing polymer layer forming a first bi-layer silicone containing polymer layer; thermally treating said first bi-layer silicone containing polymer layer; and removing said first bi-layer silicone containing polymer layer from said anti-adherent agent on said substrate.