Patent ID: 8533943
Filing Date: 2013-09-17
Classification: C23G,H01L,H05K,Y10T

Abstract:
1. A method of manufacturing a multilayer printed circuit board, comprising: preparing a substrate having a first conductor circuit formed over said substrate; forming on said first conductor circuit formed over said substrate a film comprising a cycloolefin resin such that an interlayer resin insulating layer comprising the cycloolefin resin is formed on the substrate and said first conductor circuit; forming in the interlayer resin insulating layer an opening exposing at least a portion of the first conductor circuit; forming an electroless plating film covering a surface of the interlayer resin insulating layer including a surface of the interlayer resin insulating layer inside the opening; forming on the electroless plating film a plating resist layer having a pattern exposing selected portions of the electroless plating film, the selected portions of the electroless plating film including a second conductor circuit and a portion of the electroless plating film covering the opening; and forming an electrolytic plating film covering the selected portions of the electroless plating film such that a filled via conductor comprising an electrolytic material filling to close a space in the opening and that the first conductor circuit over the substrate is connected to the second conductor circuit over the interlayer resin insulating layer via the via conductor.