Patent ID: 8507316

Claim:
A method comprising: performing a first die-saw on a package structure comprising: a device wafer comprising: a first die, wherein the first die comprises a first contact pad; and a second die comprising a second contact pad; and a carrier wafer attached to the device wafer, wherein the first die-saw forms a first trench in the package structure, and wherein side edges of the first and the second contact pads are exposed to the first trench; forming a first metal lead and a second metal lead extending into the first trench and contacting the side edges of the first and the second contact pads, respectively, wherein the first and the second metal leads are interconnected through a connecting metal portion; performing a pre-cut to cut the connecting metal portion to separate the first and the second metal leads, wherein remaining portions of the connecting metal portion comprises edges after the pre-cut; forming a first dielectric coating over the first and the second metal leads; and performing a second die-saw to saw apart the package structure, wherein the first and the second dies are separated into a first piece and a second piece respectively, and wherein in the first and the second pieces, the edges of the remaining portions of the connecting metal portion are covered by remaining portions of the first dielectric coating.