Patent ID: 7492015

Claim:
A carbon nanotube field effect transistor comprising: a semiconductor substrate; at least one carbon nanotube above said substrate, said carbon nanotube having a first side, a second side opposite said first side and opposing ends, and comprising a channel region between said opposing ends; source/drain electrodes contacting said opposing ends on said first side without extending laterally beyond said opposing ends; a first gate on said first side above said channel region, said first gate being positioned laterally between said source/drain electrodes such that no portion of said first gate overlaps said source/drain electrodes, wherein said first gate is adapted to impart a first potential on said channel region so as to turn on said carbon nanotube field effect transistor; and second gates between said second side and said substrate, said second gates being positioned adjacent to said opposing ends opposite said source/drain electrodes, wherein said second gates are adapted to impart a second potential on said opposing ends so as to configure said carbon nanotube field effect transistor as one of a p-type transistor and an n-type transistor, and wherein relative positions of said first gate and said source/drain electrodes on said first side and said second gates on said second side minimizes parasitic capacitance between said second gates and said first gate and avoids parasitic resistance between said second gates and said source/drain electrodes.