Patent ID: 9646962
Date: 2017-05-09
CPC Classifications: H01L

Claim:
1. A semiconductor device including an electrostatic discharge (ESD) device formed adjacent to a first fin field effect transistor (finFET), the device comprising: a substrate; the first finFET, the first finFET being formed such that it includes finFET fins extending from the substrate; and the ESD device, the ESD device being adjacent to the first finFET and including two vertically stacked PN diodes including vertically stacked first, second, third and fourth layers, wherein the first layer is an N doped layer and is disposed directly over the substrate, the second layer is a P doped layer and is disposed directly over the first layer, the third layer is an N doped layer and is disposed directly over the second layer and the fourth layer is a P doped layer and is disposed directly over the third layer.