Patent ID: 7800209

Claim:
A wiring board, comprising: a film base; a plurality of conductive wirings aligned on the film base; and protrusion electrodes formed of a plated metal at end portions of the conductive wirings, respectively, wherein an outer surface at both side portions of the protrusion electrodes in cross section in a width direction of the conductive wirings defines a curve, and the protrusion electrodes in cross section in a longitudinal direction of the conductive wirings define a rectangular shape, the conductive wirings comprise a first conductive wiring having a wiring width of W 1 and a second conductive wiring having a wiring width of W 2 larger than W 1 , the protrusion electrodes comprise a first protrusion electrode formed on the first conductive wiring and having a width of W 3 and a second protrusion electrode formed on the second conductive wiring and having a width of W 4 larger than W 3 , the first protrusion electrode and the second protrusion electrode are substantially the same height, and a part of side surfaces of the conductive wirings is covered with the protrusion electrodes.