Patent ID: 7485959

Claim:
A structure for joining a semiconductor package to a substrate, the structure comprising: a semiconductor package including: a printed circuit board having a first surface and a second surface opposite to the first surface, a first wiring layer provided on the second surface, and a first insulating protective layer provided on the first wiring layer and having a first opening to expose a portion of the first wiring layer; a substrate having a third surface facing the second surface, a second wiring layer provided on the third surface, and a second insulating protective layer provided on the second wiring layer and having a second opening to expose a portion of the second wiring layer; and a conductive material column provided in the first opening and the second opening to connect the first wiring layer and the second wiring layer, wherein the combined heights of the first opening and the second opening form about 20% to about 100% of the height of the conductive material column, wherein a height of the conductive material column between the second surface and the third surface is substantially constant from a first sidewall of one of the first and second openings to a second sidewall of the one of the first and second openings, and wherein the first insulating protective layer and the second insulating protective layer are formed from a photo solder resist.