Patent ID: 8658908

Claim:
A multiple patterning wiring board, comprising: a base substrate comprising, in one main surface thereof, a plurality of wiring board regions arranged in rows and columns, the wiring board regions each comprising an electronic component mounting region in a center portion thereof, a dividing groove at borders between the wiring board regions, a lid member bonding region disposed between the electronic component mounting region and the dividing groove, a groove disposed in the lid member bonding region, a first wiring on an upper side surface of the base substrate, a second wiring on a lower side surface of the base substrate, and a conductive via connecting the first wiring to the second wiring, wherein the groove has a width less than a width of the lid member bonding region and a depth less than a depth of the dividing groove, and wherein, in a cross sectional surface perpendicular to the one main surface of the base substrate, the dividing groove and the groove are both V-shaped, and a bottom angle of the groove is larger than a bottom angle of the dividing groove.