Patent ID: 8063486
Filing Date: 2011-11-22
Classification: H01L,H05K

Abstract:
1. A circuit board that includes a base material and a flat-plate electrode formed on at least one main surface of the base material, comprising: an easy peeling portion formed in at least one of an inner portion and a side portion of the flat-plate electrode, wherein the easy peeling portion is embedded in the flat-plate electrode, the flat-plate electrode other than the easy peeling portion is composed of a single unitary metal or alloy composition from a portion of the electrode that adheres to the base material to a portion of the flat-plate electrode that is opposite to the base material, and an adhesive strength between the flat-plate electrode and the easy peeling portion is less than an adhesive strength between the flat-plate electrode and the base material; wherein the easy peeling portion is multilayered and in a cross section cut in the direction perpendicular to the base material, in adjacent layers, portions forming the easy peeling portion are arranged alternately with portions not forming the easy peeling portion.