Buried nano-structured layers in high temperature-pressure treated Cz-Si:He
|Andrzej Misiuk 1, Barbara Surma 1,2, Jadwiga Bak-Misiuk 3|
1. Institute of Electron Technology (ITE), al. Lotników 32/46, Warszawa 02-668, Poland
The effects of treatment of helium implanted Czochralski grown silicon (Cz-Si:He, He ion dose up to 10(17)cm(-2),at energy up to 300 keV) at HT up to 1400 K under hydrostatic pressure, HP, up to 1.2 GPa are investigated by transmission electron microscopy, photoluminescence and X-Ray methods.
The treatment at up to 920 K under HP results in a creation of buried nano-structured layers containing thin-walled He-filled cavities and bubbles.
The Cz-Si:He samples treated at even higher HT indicate the presence of dislocated (defected) buried layers; their structure depends strongly on HP applied.
HP affects diffusivity of implanted helium and of implantation - induced point defects and thus promotes a creation of smaller but more numerous cavities / bubbles as well as of other defects near the range of implanted helium ions.
Presentation: oral at E-MRS Fall Meeting 2005, Symposium I, by Andrzej Misiuk
See On-line Journal of E-MRS Fall Meeting 2005
Submitted: 2005-05-23 14:34 Revised: 2009-06-07 00:44