Patent ID: 6049119
Filing Date: 2000-04-11
Classification: H01L

Abstract:
A semiconductor device comprising:a trigger circuit;a protection device including:a first top substrate region overlying a substrate, said first top substrate region having a first conductivity type;a second top substrate region overlying said substrate, said second top substrate region having a second conductivity type that is opposite said first conductivity type, wherein said first and second top substrate regions abut each other:a first doped region in said first top substrate region, said first doped region having said first conductivity type;a second doped region having said second conductivity type, wherein said second doped region lies within portions of said first and second top substrate regions, wherein said trigger circuit is coupled to said second doped region;a third doped region in said second top substrate region, said third doped region having said first conductivity type; anda feature abutting said second top substrate region, wherein:said feature having said second conductivity type and a doping concentration higher than said second top substrate region; andsaid feature is selected from a group consisting of:said substrate; anda fourth doped region in said second top substrate region.