Patent ID: 6652993
Filing Date: 2003-11-25
Classification: H05K,Y10S,Y10T

Abstract:
A copper clad laminate with a copper-plated circuit layer, comprising a copper plated circuit layer for manufacturing a printed wiring board through a semi-additive method, wherein the copper clad laminate and an outer-layer copper foil layer that satisfied the relationship in a case where a specific etchant is used, the Rv value (Vsc/Vsp), which is the ratio of the dissolution rate (Vsp) of deposited copper that constitutes said copper-plated circuit layer to the dissolution rate (Vsc) of the copper that constitutes said outer-layer copper foil layer, is more than 1.0, wherein the specific etchant is selected from the group comprising copper-chloride-based, iron-chloride-based and sulfuric acid/hydrogen peroxide-based solutions.