Patent ID: 7367116
Filing Date: 2008-05-06
Classification: H05K,Y10T

Abstract:
1. A method for fabricating a printed circuit board, comprising the steps of: forming a through-hole in an interconnection site of a printed circuit board having first and second printed circuit layers formed on both faces of an insulating layer in such a manner that the through-hole passes through the first and second printed circuit layers and the insulating layer; inserting a conductive ball with a core and solder integrally formed around the core into the through-hole; and fusing the solder of the conductive ball in the through-hole to fill a space between the conductive ball and the through hole and thereby provide interconnection between the first circuit layer and the second circuit layer, wherein the printed circuit board is formed by bonding two single printed circuit boards each having a printed circuit layer formed on one face of an insulating layer, via an adhesive layer therebetween in such a manner that one of the circuit layers is the outermost layer.