Patent ID: 8970035
Filing Date: 2015-03-03
Classification: H01L

Abstract:
1. A package structure, comprising: a first substrate having a first region and a second region and comprising a metal pad overlying the first substrate in the first region, a first metal pillar overlying the metal pad, a passivation layer overlying the first substrate in the second region, and a second metal pillar in the second region, wherein the first metal pillar extends through the passivation layer and has a bottommost surface below a top surface of the passivation layer and the second metal pillar has a bottommost surface on the top surface of the passivation layer; and a second substrate comprising a first connector and a second connector, wherein the first substrate is bonded to the second substrate, in which a first solder joint region is formed between the first metal pillar and the first connector, and a second solder joint region is formed between the second metal pillar and the second connector; and wherein a thickness of the first metal pillar is greater than the thickness of the second metal pillar.