Patent ID: 8935850
Filing Date: 2015-01-20
Classification: H01L,H05K,Y10T

Abstract:
1. A method for manufacturing a printed wiring board, comprising: forming a removable layer on a support substrate; forming an interlayer resin insulation layer on the removable layer; forming a penetrating hole in the interlayer resin insulation layer; forming a first conductive layer on the interlayer resin insulation layer and on a side wall of the penetrating hole; forming a conductive circuit on the interlayer resin insulation layer; forming a via conductor in the penetrating hole; removing the support substrate from the interlayer resin insulation layer by using the removable layer; reducing a thickness of the interlayer resin insulation layer such that a portion of the via conductor protrudes from a surface of the interlayer resin insulation layer and forms a protruding portion protruding from the surface of the interlayer resin insulation layer; and forming a surface-treatment coating on a surface of the protruding portion of the via conductor.