Patent ID: 7704852
Filing Date: 2010-04-27
Classification: H01L

Abstract:
1. A method of forming a low-defect-density hybrid orientation semiconductor-on-insulator substrate comprising the steps of: forming a bilayer template layer stack on an insulating substrate layer, said bilayer template layer stack comprising a first lower single crystal semiconductor-on-insulator layer having a first crystal orientation and a second upper single crystal semiconductor layer having a second crystal orientation different from the first crystal orientation; amorphizing the first lower single crystal semiconductor-on-insulator layer of the bilayer template layer stack in selected areas to form localized amorphized regions; performing a recrystallization anneal at or below a first temperature to convert the localized amorphized regions of the first lower single crystal semiconductor-on-insulator layer into regions of changed-orientation semiconductor having the second crystal orientation of the second upper single crystal semiconductor layer; removing the second upper single crystal semiconductor layer of the bilayer template layer stack to expose the first lower single crystal semiconductor-on-insulator layer; forming a dielectric isolation region to laterally separate original orientation and changed orientation regions of the first lower single crystal semiconductor-on-insulator layer wherein the isolation region contacts an insulating substrate layer; and performing a defect removal anneal at or above a second temperature higher than the first temperature.