Patent ID: 8734934
Filing Date: 2014-05-27
Classification: H05K,Y10T

Abstract:
1. A surface metal film material comprising, in this order, a substrate, a polymer layer that receives a plating catalyst or a precursor thereof, and a metal film formed by plating, wherein, when x μm represents surface roughness (Ra) at an interface between the substrate and the polymer layer, and y μm represents surface roughness (Ra) at an interface between the polymer layer and the metal film, x>y, wherein, when T μm represents a thickness of the polymer layer, T and x satisfy the relationship 2x≦T, wherein the surface roughness (Ra) at the interface between the substrate and the polymer layer satisfies a relationship: 3 μm>x≧0.8 μm, and wherein the surface roughness (Ra) at the interface between the polymer layer and the metal film is from 0.05 μm to 0.5 μm wherein the metal film is etched to form a metal pattern.