Patent ID: 8729397
Filing Date: 2014-05-20
Classification: H05K,Y10T

Abstract:
1. An embedded structure, comprising: a substrate; a first patterned conductive layer disposed on said substrate and selectively exposing said substrate; a first dielectric layer, covering said first patterned conductive layer and said substrate, wherein an outer surface of said first dielectric layer has a substantially even surface with a roughness A; a pad opening formed in said first dielectric layer, wherein the surface of said first dielectric layer in said pad opening has a roughness B; a trench formed in said first dielectric layer, wherein an inner wall of said trench has said roughness B; and a via formed in said pad opening and exposing said first patterned conductive layer, wherein said via and said pad opening together define said embedded structure, the surface of said first dielectric layer in said via has a roughness C and the roughness of A, B and C are mutually different.