Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-25T19:25:03.869Z Has data issue: false hasContentIssue false

Gettering of Cu at Buried Damage Layers Made by Si Self Implantation

Published online by Cambridge University Press:  25 February 2011

J.R. Liefting
Affiliation:
FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands
R.J. Schreutelkamp
Affiliation:
FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands
W.X. Lu
Affiliation:
FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands
F.W. Saris
Affiliation:
FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands
Get access

Abstract

Channeled implants have been performed with lOOkeV 28Si+ into p-type Si(100) to obtain a buried amorphous layer. Before and after recrystallization of the a-Si layer, Cu was implanted at an energy of 15 keV and a dose ranging from 5E13 to 1E15 I cm2- to obtain a high concentration of Cu in the near surface region. Also, Cu implants were performed into virgin Si for comparison. After Cu implantation, thermal annealing was performed at temperatures between 490 °C and 900 °C for 10 min. to 320 min. Cu profiles before and after annealing were studied with Rutherford Backscattering Spectrometry and channeling analysis. For the case where Cu was implanted after recrystallization of the buried amorphous layer, Cu was gettered at the position where the ale interfaces met during recrystallization. For the case where Cu was implanted before recrystallization, Cu diffused towards the buried a-Si region upon annealing and was trapped inside the recrystallizing buried amorphous layer. The results show that buried damage layers can effectively getter Cufrom the Si surface layer and gettering is most efficient at 600 °C.

Type
Research Article
Copyright
Copyright © Materials Research Society 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1 Monkowski, J.R., Solid State Technol. 24, 44 (1981)Google Scholar
2 Wong, H. and Cheung, N.W., Appl. Phys. Lett. 52, 889 (1988)Google Scholar
3 Lecrosnier, D., Nucl. Instr. and Meth. 209/210. 325 (1983)Google Scholar
4 Berrian, D.W., Kaim, R.E., Vanderpot, J.W. and Westendorp, J.F.M., Nucl. Instr. and Meth. B37/38. 500 (1989)Google Scholar
5 Polman, A. et al. Nucl. Instr. and Meth., B37/38 , 935 (1989)Google Scholar
6 Custer, J.S., Thompson, Micheal O. and Poate, J.M. in Processing and Characterization of Materials Using Ion Beams edited by Rehn, L.E., Greene, J. and Smith, F.A. (Mater. Res. Soc. Vol. 128, Boston, MA, 1988) pp. 545550 Google Scholar
7 Jones, K.S., Prussin, S. and Weber, E.R., Appl. Phys., A45. 1 (1988)Google Scholar