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Effect of Implantation Conditions on the Microstructure of High-Current, Oxygen Implanted Silicon-on-Insulator Material

Published online by Cambridge University Press:  25 February 2011

S. Visitsemgtrakul
Affiliation:
Department of Chemical, Bio and Materials Engineering, Arizona State University, Tempe, AZ 85287
B.F. Cordts
Affiliation:
Ibis Technology Corporation, 32A Cherry Hill Drive, Danvers, MA 01923.
S. Krause
Affiliation:
Department of Chemical, Bio and Materials Engineering, Arizona State University, Tempe, AZ 85287
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Abstract

Conventional and high resolution electron microscopy were used to study structural development in silicon-on-insulator material produced by oxygen implantation at temperatures of 525 to 700°C, doses of 0.3 to 1.8 × 1018 cm-2, and current densities of 1 and 10 mA/cm2. Implantation temperature has the strongest effect on the microstructure and defect formation, both in as-implanted and annealed material. In the top silicon layer of as-implanted SIMOX, oxygen bubbles form near the surface when the wafer temperature is ≥ 550°C. A new type of defect, the multiply faulted defect (MFD), has been observed at the upper edge of the implantation region with a density of 108 cm-2 in the samples implanted at the temperature of ≥ 600°C. As dose increases from 0.3 to 1.8 × 1018 cm-2, the bubbles grow larger and the trails of bubbles lengthen while the character and density of MFDs remain the same. A continuous buried oxide layer forms at doses ≥ 1.5 × 1018 cm2. No significant difference in structure is observed when a current-density increases from 1 to 10 mA/cm2.

Type
Research Article
Copyright
Copyright © Materials Research Society 1990

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References

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