Patent ID: 8591750

Claim:
A method for manufacturing a multilayer wiring board, comprising the steps of: forming a first conductor layer on a first surface and a second surface of an insulating layer; placing a laminated sheet composed of a resin layer and a second conductor layer on the first conductor layer that is formed on the first surface of the insulating layer so that the resin layer comes into contact with that first conductor layer, and curing the resin layer; forming a connection hole penetrating the laminated sheet, the first conductor layer formed on the first surface of the insulating layer, and the insulating layer, so that the first conductor layer formed on the second surface of the insulating layer is exposed inside the connection hole; forming a third conductor layer on the second conductor layer and inside the connection hole; patterning the second conductor layer and the third conductor layer; etching the resin layer using the patterned second and third conductor layers as a mask; etching the first conductor layer formed on the first surface of the insulating layer using at least the etched resin layer as a mask, and forming a wiring pattern.