Patent ID: 9614369
Date: 2017-04-04
CPC Classifications: H01L,H02H

Claim:
1. A device comprising an electrostatic discharge protection clamp having an anode and a cathode each of which are adapted to limit a voltage appearing across protected terminals of an integrated circuit to which the electrostatic discharge protection clamp is coupled, comprising: an active semiconductor region overlying a substrate comprising a first P-well, a second P-well, a third P-well, a first N-well between the second and third P-wells and between the first and third P-wells, a second N-well between the first and second P-wells, a first P-type contact region at the first P-well electrically connected to an anode/cathode terminal of the electrostatic discharge protection clamp, a first N-type contact region at the first P-well electrically connected to the anode/cathode terminal, a second P-type contact region at the third P-well electrically connected to a cathode/anode of the electrostatic discharge protection clamp, a second N-type contact region at the third P-well electrically connected to the cathode/anode and between the first N-well and the second P-type contact.