Patent ID: 8737027
Filing Date: 2014-05-27
Classification: H01L

Abstract:
1. A device for providing electrostatic discharge (ESD) protection, comprising: a silicon controlled rectifier (SCR); a transistor implementing a mechanism for triggering the SCR; a pair of contact regions of opposing conductivity type distinct from the SCR and interposed between a cathodic region and an anodic region of the SCR, wherein the contact regions of opposing conductivity type are configured to collect charge generated from the SCR; an interconnect structure coupling the anodic region of the SCR to a first contact region of the pair of contact regions closest to the anodic region, wherein the first contact region comprises a net concentration of dopants of opposite conductivity as the anodic region, and wherein a second contact region of the pair of contact regions closest to the cathodic region comprises a net concentration of dopants of opposite conductivity as the cathodic region, wherein the anodic region of the SCR and the first contact region are disposed within a well region having the same conductivity type as the first contact region; an additional collection region interposed between the cathodic and anodic regions of the SCR and comprising the same conductivity type as the first collection region; and interconnect structures coupling the additional collection region to a drain contact region of the transistor.