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Enhancement effect of nitrogen co-doping on oxygen precipitation in heavily phosphorus-doped Czochralski silicon during high-temperature annealing

Authors :
Jiahe Chen
Yuheng Zeng
Miangyang Ma
Deren Yang
Weiyan Wang
Source :
Journal of Crystal Growth. 311:3273-3277
Publication Year :
2009
Publisher :
Elsevier BV, 2009.

Abstract

Oxygen precipitation in conventional and nitrogen co-doped heavily phosphorus (P)-doped Czochralski silicon (CZ-Si) crystal subjected to various high-temperature annealing in the range of 1000–1150 °C was comparatively investigated. It was revealed that oxygen precipitates hardly generated in conventional heavily P-doped CZ-Si; while they remarkably generated in the nitrogen co-doped one. Moreover, nitrogen doping could enhance oxygen precipitation during the prolonged annealing with a rapid thermal process (RTP) pre-treatment, but it has neglectable influence on oxygen precipitation for short-time annealing. It was believed that nitrogen co-doped heavily P-doped CZ-Si possesses nitrogen-related complexes that act as heterogeneous nuclei for super-saturated interstitial oxygen and then enhanced oxygen precipitation. Finally, it was found that nitrogen doping could hardly enhance oxygen precipitation in heavily P-doped CZ-Si at 1200 °C.

Details

ISSN :
00220248
Volume :
311
Database :
OpenAIRE
Journal :
Journal of Crystal Growth
Accession number :
edsair.doi...........4030baf503af3e04289d0e805f01eac3
Full Text :
https://doi.org/10.1016/j.jcrysgro.2009.03.048