Patent ID: 9178058
Filing Date: 2015-11-03
Classification: H01L

Abstract:
1. A device comprising: a semiconductor substrate of a first conductivity type; a deep well region in the semiconductor substrate, wherein the deep well region is of a second conductivity type opposite to the first conductivity type; a well region of the first conductivity type over the deep well region, wherein the semiconductor substrate comprises: a gate dielectric over the top portion of the semiconductor substrate; a gate electrode over the gate dielectric; a gate spacer on a sidewall of the gate electrode; a source region and a drain region extending into the top portion of the semiconductor substrate, wherein the source region and the drain region are spaced apart from the well region by the top portion of the semiconductor substrate, and wherein the source region, the drain region, the gate dielectric, and the gate electrode form a Radio Frequency (RF) switch configured to operate in a RF frequency range; and a dielectric layer comprising a portion over and contacting one of the source region and the drain region, wherein the dielectric layer comprises a first edge contacting a second edge of the gate spacer, with the first edge extending to contact a top surface of the one of the source region and the drain region.