Patent ID: 7238891

Claim:
Circuit board, comprising: a rigid individual layer which is provided with printed conductors or is copper-clad on at least one side, said rigid individual layer having at least one rigid area and at least one flexible area, at least one copper foil, an adhesive medium directly connecting the at least one copper foil to the rigid individual layer, and wherein there is no flexible individual layer between the adhesive medium and the at least one copper foil in the rigid area of the rigid individual layer, and an insulating layer is affixed directly to an inner side of the copper foil in the at least one flexible area of the rigid individual layer, wherein the adhesive medium has an opening in alignment with the flexible area of the rigid individual layer, wherein, in the flexible area of the rigid individual layer, there is no flexible individual layer between the rigid individual layer and the copper foil, and wherein the insulating layer is a resist applied to the copper foil.