Patent ID: 8129812
Filing Date: 2012-03-06
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a substrate having a first doped region of a first doping concentration of a first conductivity type, wherein said first doped region is a well formed within said substrate; a second doped region within said first doped region having a second doping concentration higher than said first doping concentration of said first conductivity type; a trench isolation region that isolates active components in the substrate, wherein the trench isolation region is formed at least in a portion of said first doped region of said substrate, wherein the trench isolation region has two sidewalls and a bottom portion between the two sidewalls, and wherein at least one of the two sidewalls of said trench isolation region is adjacent said second doped region; and a third doped region within said first doped region having a third doping concentration, wherein a first part of the bottom portion of the trench isolation region is adjacent to the third doped region and wherein a second part of the bottom portion is adjacent to the first doped region.