Buried nano-structured layers in high temperature-pressure treated Cz-Si:He |
| Andrzej Misiuk 1, Barbara Surma 1,2, Jadwiga Bak-Misiuk 3 |
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1. Institute of Electron Technology (ITE), al. Lotników 32/46, Warszawa 02-668, Poland |
| Abstract |
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. |
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