Patent ID: 8187479
Filing Date: 2012-05-29
Classification: H05K

Abstract:
1. A method of manufacturing a printed circuit board, the method comprising: providing a laminated substrate comprising an insulator, a first metal layer and a second metal layer, the first metal layer and the second metal layer laminated on one side of the insulator; processing a via hole in the laminated substrate; forming a seed layer on an inner wall of the via hole and on a surface of the second metal layer; plating an inside of the via hole and the surface of the second metal layer with a conductive material, the conductive material being different from a material of the second metal layer; etching the seed layer and the conductive material formed on the second metal layer so as to form a via; etching the second metal layer to completely remove the second metal layer; and forming a first circuit pattern by selectively etching the first metal layer.