Patent ID: 7671416

Claim:
A device for providing electrostatic discharge (ESD) protection, comprising: a semiconductor substrate; a drain formed in the semiconductor substrate, the drain having a silicide-free drain-sub-region with a first resistance and a diffusion region having a second resistance due to incorporation of a silicide into the diffusion region; a source formed in the semiconductor substrate, the source having the second resistance; and a gate oxide disposed over a channel between the drain and the source, the gate oxide having a first edge spaced apart from the drain-sub-region of the drain and a second edge in contact with the source, wherein both the drain-sub-region and the diffusion region are contiguous alongside of the gate oxide and wherein the silicide-free drain-sub-region formed in the drain proximate to the gate oxide extends downwards to a depth and below a portion of the gate oxide of the drain so as to force the ESD down into a silicon bulk layer of the substrate away from the gate oxide.