Patent ID: 7256461
Filing Date: 2007-08-14
Classification: H01L

Abstract:
1. An electrostatic discharge (ESD) protection device, comprising: a semiconductor bulk of a first conductivity type; a first doped region of a second conductivity type formed in said semiconductor bulk; a second doped region of a second conductivity type formed in said semiconductor bulk; a channel region formed between said first doped region and said second region, and said channel region comprises a first part, a second part and a third part; wherein said first part and said third part are the different ends of said channel region, and said second part is located between said first part and said third part; a first gate segment formed only over a first part of said channel region; a first field-oxide stripe formed only over a second part of said channel region; and a first end of said first gate segment overlaps said first field-oxide stripe.