Patent ID: 8198140

Claim:
A method of manufacturing a wiring substrate for mounting semiconductors comprising: forming two wiring substrates with a support substrate, said forming each of said wiring substrates with a support substrate comprising: forming a conductive layer comprising a plurality of sectioned conductive layers on said support substrate; forming an insulation layer on said conductive layer; forming one or more intermediate layers on said insulation layer, said forming each of intermediate layers comprising: forming vias in said insulation layer; forming a wiring on said insulation layer; and forming other insulation layer on said wiring; forming via holes in said intermediate layer that is made into an uppermost surface of said one or more intermediate layer; and filling a conductor in the via holes to form vias; adhering said intermediate layers, which are overlapped contacting each other forming an uppermost surface of said two wiring substrates with a support substrate, to each other in a face-to-face state; and removing a part or the entirety of said support substrates to expose the conductive layer so the plurality of sectioned conductive layers become electrode pads.