Patent ID: 8741762

Claim:
A method of making an interconnection for a semiconductor device comprising: (a) providing a first semiconductor device having first and second major surfaces; (b) forming a via through the first major surface of the first semiconductor device; (c) forming a mask layer on the first major surface, the mask layer comprising a mask opening to expose the via; (d) providing a conductive material; (e) heating the conductive material to form a through via contact, wherein the through via contact at least partially fills the via and the through via contact partially fills the mask opening; (f) exposing the through via contact from the second major surface; (g) repeating step (a) to (f) to provide a second semiconductor device; (h) stacking the first semiconductor device on the second semiconductor device to form a stack structure; and (i) reflowing the conductive material of the through via contact of the first semiconductor device such that the partially filled mask opening of the second semiconductor device is completely filled by the reflowed conductive material of the through via contact of the first semiconductor device to form an interconnection between the first and the second semiconductor devices.