Patent ID: 9633963
Date: 2017-04-25
CPC Classifications: H01L

Claim:
1. A method of manufacturing a packaging device, the method comprising: forming a contact pad over a substrate; forming a passivation layer over the substrate and the contact pad; etching an opening in the passivation layer to expose a first portion of the contact pad, wherein a second portion of the contact pad remains covered by the passivation layer; forming a polymer layer on the passivation layer, wherein the polymer layer fills a part of the opening in the passivation layer; forming a post passivation interconnect (PPI) line over the polymer layer, wherein the PPI line is coupled to the first portion of the contact pad; forming a PPI pad over the polymer layer; forming a transition element over the polymer layer, wherein the transition element is coupled between the PPI line and the PPI pad, and wherein the transition element comprises a hollow region; forming a conductive material comprising a eutectic material over the PPI pad; and re-flowing the eutectic material to form a wetting region over a portion of the transition element, wherein the wetting region is not formed on the PPI line.