Patent ID: 6225172
Filing Date: 2001-05-01
Classification: H01L

Abstract:
A method of forming a field effect transistor comprising the following steps:providing a silicon substrate having impurity doping of a first conductivity type, the silicon substrate comprising a silicon on insulator layer;forming source and drain diffusion regions of a second conductivity type within the silicon substrate, the source region and the drain region being spaced from one another to define a channel region therebetween within the silicon substrate, the source region extending only partially through the silicon on insulator layer;forming a barrier layer over the drain region and not over the source region;forming a gate relative to the silicon substrate operatively adjacent the channel region; andforming respective electrical contacts to the source region and the drain region, the electrical contact to the source region directly contacting the source region, the electrical contact to the drain region being separated from the drain region by the barrier layer.