Restoration of Resistivity and Lifetime in Heat Treated Germanium

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Abstract
Experiments are described in which minority carrier lifetime and resistivity of germanium are altered by the addition of copper by diffusion, under conditions where extraneous chemical contamination is minimized. This copper is then gettered by heating the samples in contact with liquid lead or gold, and the resistivity and lifetime are substantially restored. The gettering process in interpreted in terms of the low distribution coefficient of copper in the ternary system which copper and germanium form with the getter.