Patent ID: 8080741
Filing Date: 2011-12-20
Classification: H05K

Abstract:
1. A printed circuit board, comprising: an insulation layer which includes a first circuit pattern, including at least one via land, embedded in an upper surface of the insulation layer such that it is flush with the upper surface, and a second circuit pattern formed in a lower surface of the insulation layer such that it is formed at a position corresponding to the at least one via land and is flush with the lower surface; a solder resist layer formed on the insulation layer; a via hole formed in the insulation layer to electrically connect the via land to the second circuit pattern; and a bump integrally formed on the second circuit pattern through the via hole and the via land such that it protrudes from the insulation layer to be higher than the solder resist layer, the bump including a head part and a planar upper surface, and a lower end of the head part, which is brought into contact with the via land, being larger than a diameter of the via hole but smaller than a diameter of the via land.