Patent ID: 7250575

Claim:
A wiring board comprising: a flexible insulating base, a plurality of conductive wirings arranged on the flexible insulating base, protruding electrodes provided respectively at one end portion of the same side of each of the conductive wirings, external terminals formed respectively at the other end portion of each of the conductive wirings, metal plating layers applied on the conductive wirings, the protruding electrodes and the external terminals, and solder resist layers formed by coating the conductive wirings in a region between the end portions at which the protruding electrodes are provided and the external terminals, wherein in the regions where the solder resist layers are formed, the metal plating layers are not formed on the conductive wirings, and surfaces of the conductive wirings to be contacted with the flexible insulating base have a surface roughness greater than surfaces not to be contacted with the flexible insulating base.