Patent ID: 8661661

Claim:
A laser printing process for the production of at least one circuit portion on a substrate made from aplastic material, said process comprising the following steps: (a) depositing at least one granular material on a melting-in layer of said substrate so that said at least one granular material is distributed on said melting-in layer according a predetermined geometrical pattern, said at least one granular material including an electrically conducting material; (b) using as the substrate a film multilayer structure having a first plastic film which forms said melting-in layer and a second plastic film which form a carrier, wherein the first plastic film has a lower softening temperature than the second plastic film; and (c) heating the multilayer structure with the deposited granular material to the softening temperature of the melting-in layer so that the granular material enters into an intimate bond with the melting-in layer and, by adhering thereto, forms the at least one circuit portion on the substrate.