Patent ID: 9553165
Date: 2017-01-24
CPC Classifications: H01L

Claim:
1. A method of forming a semiconductor device comprising: providing a semiconductor substrate of a first conductivity type; forming a first doped region of a second conductivity type on the semiconductor substrate; forming a second doped region of the first conductivity type overlying the first doped region the second doped region having a first surface that is opposite to the first doped region; forming a third doped region having the second conductivity type on the first surface of the second doped region; forming a fourth doped region of the first conductivity type in the third doped region; forming one or more gate structures extending through the fourth doped region; forming a plurality of termination trenches extending through the third doped region and into the first doped region wherein the plurality of termination trenches surround the first, second, third, and fourth doped regions and the one or more gate structures; and removing a portion of the semiconductor substrate to expose the first doped region.