Patent ID: 7825470
Filing Date: 2010-11-02
Classification: H01L,Y10S

Abstract:
1. A semiconductor-on-insulator field effect transistor comprising: a single crystal silicon substrate; a buried insulator layer of rare earth insulator material on the semiconductor substrate, the buried insulator layer of rare earth insulator material including a rare earth oxynitride tailored to produce a lattice constant one of larger or smaller than the lattice constant of the silicon substrate, whereby the buried insulator layer forms a strain graded or lattice mismatched pseudo-substrate; a channel layer of single crystal silicon on the buried insulator layer of rare earth insulator material; a gate insulator layer of rare earth insulator material on the channel layer; a gate stack of silicon on the gate insulator layer; a drain region in the channel layer adjacent one side of the gate stack with a portion of the channel layer in the drain region being doped for conduction; a source region in the channel layer adjacent an opposite side of the gate stack with a portion of the channel layer in the source region being doped for conduction, the doping in both the drain region and the source region extending through the channel layer to the buried insulator layer to provide a fully depleted channel layer; and a metal gate contact on the gate stack, a metal drain contact on the doped portion of the channel layer in the drain region, and a metal source contact on the doped portion of the channel layer in the source region.