Patent ID: 8217497

Claim:
A differential varactor structure, comprising: a first fin formed from a n-type well (NW) layer and being disposed perpendicularly to and contacting a top surface of a p-type substrate; a first insulator formed on a top surface of said first fin; a second insulator formed on a first side and a second side of said first fin, said second insulator on each of said first and second sides contacting said top surface of said p-type substrate; a first conductor and a second conductor formed through said second insulator, each of said first conductor and said second conductor being lateral to and separate from said first and said second sides, respectively, of said first fin, said first and second conductors penetrating to a level above and separate from a bottom surface of said second insulator, and a top surface of each of said first and second conductors being co-planar with a top surface of said first insulator; a first vertical anode plate formed on and being perpendicular to said top surface of said first conductor, said first vertical anode plate being lateral to said first side of said first fin; and a second vertical anode plate formed on and being perpendicular to said top surface of said second conductor, said second vertical anode plate being lateral to said second side of said first fin and electrically isolated from said first vertical anode plate.