Patent ID: 8921943
Filing Date: 2014-12-30
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate of a first conductivity type; a first active area containing an ESD cell coupled to a first terminal and disposed in a well of the first conductivity type; a second active area in the semiconductor substrate, the second active area separated from the first active area by an isolation region, the second active area comprising a first diffusion of the first conductivity type for making a bulk contact to the well of the first conductivity type, the second active area coupled to a second terminal; and a third active area in the semiconductor substrate, the third active area separated from the first and second active areas by one or more isolation regions, the third active area comprising a second diffusion of a second conductivity type opposite to the first conductivity type and an implant diffusion of the first conductivity type adjacent the second diffusion of the second conductivity type; wherein the third active area comprises a diode coupled to the first terminal and reverse biased with respect to the well of the first conductivity type.