Patent ID: 8096049

Claim:
A method of manufacturing a multilayer wiring board, comprising the steps of: fabricating a unilayer wiring board having wiring layers formed in desired shapes on both sides of an insulating base member by means of patterning, having a metal post formed on the wiring layer on at least one side of the insulating base member, and having an electrically conductive material formed on the top of the metal post; preparing and stacking up a desired number of unilayer wiring boards, including preparing the boards disposed in at least the uppermost and lowermost layers without having a metal post and an electrically conductive material, and positioning and stacking up the boards in such a manner that the wiring layers of the boards are interconnected through metal posts and electrically conductive materials formed on the boards disposed inside, to thereby establish an electrical connection between stacked boards; filling resin into gaps between the stacked boards in which adjacent boards are electrically connected to each other; and forming insulating layers on both sides of a multilayer board obtained through the above steps, in such a manner that the insulating layers cover the entire surface except pad areas defined at predetermined positions on the respective wiring layers.