Patent ID: 8716067
Filing Date: 2014-05-06
Classification: H01L

Abstract:
1. A method comprising: (a) obtaining a thinned disc-shaped semiconductor wafer, wherein a recess extends into a first side of the wafer such that the wafer has a thinner central portion and a thicker peripheral edge support portion; (b) forming a P-type isolation zone in the thinner central portion of the first side of the wafer; (c) forming a P-type diffusion region in a second side of the wafer opposite the first side such that the P-type isolation zone overlaps the P-type diffusion region, wherein the thicker peripheral edge support portion is a part of the wafer at the time of the forming of (b) and the forming of (c); (d) forming a glassivation layer over the P-type isolation zone; and (e) further processing the wafer after (b), (c) and (d) and thereby forming a plurality of semiconductor devices, wherein the P-type isolation zone formed in (b), the P-type diffusion region formed in (c), and the glassivation layer formed in (d) are parts of one of the semiconductor devices.