Patent ID: 8399348

Claim:
A method for manufacturing a semiconductor device, the method comprising: forming a passivation layer on a first surface of a semiconductor die having at least one bond pad, wherein a central area of the at least one bond pad is exposed; forming a seed layer on the passivation layer and the exposed portions of the at least one bond pad; forming a photoresist layer on the seed layer; forming a first through hole and a second through hole in the photoresist layer, the first through hole formed in the photoresist layer to expose a portion of the seed layer corresponding to a region including the bond pad, and the second through hole extending from a lateral surface of a lower portion of the first through hole toward the photoresist layer; forming a conductive pillar by, at least in part, filling the second through hole and at least a portion of the first through hole with a same conductive material; forming a solder layer on the conductive pillar; and removing the photoresist layer and portions of the seed layer.