Patent ID: 7882627

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, and having a metal bump formed on the wiring layer on one side of the insulating base member; preparing and stacking up a desired number of unilayer wiring boards, including preparing the board disposed in the uppermost layer without having a metal bump, and positioning and stacking up the boards in such a manner that a metal bump of one of adjacent boards is connected to a corresponding wiring layer of the other board, to thereby establish an electrical connection between the 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.