Patent ID: 6885068

Claim:
A digital follower device comprising: an n-channel vertical FET device; and a p-channel vertical FET device wherein each said vertical FET device comprises: a bulk region in a semiconductor substrate wherein said bulk region comprises a first doping type; a STI region in said bulk region; a drain region on a first side of said STI region wherein said drain region overlies said bulk region and wherein said drain region comprises said first doping type; a gate region on a second side of said STI region wherein said gate region comprises said first doping type and wherein a voltage on said gate region controls a vertical channel in said bulk region; and a buried region between said gate region and said bulk region wherein said buried region comprises a second doping type, wherein said n-channel FET device drain and said p-channel FET device drain are coupled together, and wherein said n-channel FET device gate and said p-channel FET device gate are connected together.