Patent ID: 9570299
Date: 2017-02-14
CPC Classifications: B82Y,G01N,H01L,Y10S

Claim:
1. A method for forming nanotubes on a buried insulator, the method comprising the steps of: forming one or more fins in a silicon-on-insulator (SOI) layer of an SOI wafer, wherein the SOI wafer has a substrate separated from the SOI layer by the buried insulator; forming a silicon germanium (SiGe) layer on the fins; annealing the SiGe layer under conditions sufficient to drive-in germanium (Ge) from the SiGe layer into the fins and form a SiGe shell completely surrounding each of the fins; and removing the fins selective to the SiGe shell, wherein the SiGe shell which remains forms the nanotubes on the buried insulator.