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Fourier Transform Photoluminescence Analysis of Trace Impurities and Defects in Silicon

Published online by Cambridge University Press:  25 February 2011

W. M. Duncan
Affiliation:
Texas Instruments Incorporated., Central Research Laboratories, Dallas, TX 75265
M. L. Eastwood
Affiliation:
MIDAC Corporation, Costa Mesa, CA 92627
H-L. Tsai
Affiliation:
Texas Instruments Incorporated., Central Research Laboratories, Dallas, TX 75265
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Abstract

In this paper we describe Fourier transform Photoluminescence (FTPL) spectroscopy and report the first application of this technique to the analysis of semiconductor silicon. Two applications of FTPL spectroscopy to silicon are discussed. The first application is to quantitative trace analysis of the Ill-V impurities B,P, As and Al in silicon. Both high purity and compensated silicon have been studied and PL features correlated to the concentrations of the individual impurity species present. The capability of analysing B, P, As and Al at part per trillion atomic concentrations in silicon is demonstrated. In the second part of this paper, application of FTPL to the analysis of thermally induced microdefects in silicon is discussed. Defect band intensities are shown to be proportional to the concentration of interstitial oxygen precipitated in the case of plate precipitate morphology. In these two applications, FTPL is shown to uniquely provide both residual impurity and microdefect information of as grown and processed silicon.

Type
Articles
Copyright
Copyright © Materials Research Society 1986

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