Patent ID: 7619262
Filing Date: 2009-11-17
Classification: H01L

Abstract:
1. An electrostatic discharge protection device, comprising: an interconnect region having a first interconnect and a second interconnect; a dynamic region including a first Pwell region contacting the first interconnect, a second Pwell region contacting the second interconnect, and an Nwell region situated between the first Pwell region and the second Pwell region, wherein the first Pwell region includes a first P+ contact, a first N+ contact and a second P+ contact, and wherein the second Pwell region includes a third P+ contact, a second N+ contact and a forth P+ contact; and a platform region including an N-doped base region situated adjacent to the first Pwell region and the second Pwell region; wherein at least one of a breakdown voltage, an NPN critical voltage, and an NPN critical current, measured from the first interconnect to the second interconnect, is adjustable, wherein the breakdown voltage is adjusted by varying at least one of spacing of the second P+ contact relative to the Nwell region, the first Pwell region relative to the Nwell region, the third P+ contact relative to the Nwell region and the second Pwell region relative to the Nwell region, wherein the NPN critical voltage is adjusted by varying one of a resistance from the first N+ contact to the forth P+ contact, a resistance from the first P+ contact to the second N+ contact, and a sheet resistance of the second Pwell region, the Nwell region, and the first Pwell region, and wherein the NPN critical current is adjusted by varying one of a width of the first N+ contact multiplied by a sheet resistance of the first Pwell region situated adjacent to the first N+ contact, and a width of the second N+ contact multiplied by a sheet resistance of the second Pwell region situated adjacent to the second N+ contact.