Abstract

The arsenic (As) diffusion behavior through a strained Si/relaxed heterostructure having Ge contents of 0.15, 0.20, and 0.25 has been investigated using a thermal-diffusion method in order to avoid the crystal damage associated with ion implantation. As-concentration profiles through a strained heterostructure obtained by secondary-ion mass spectroscopy are in approximate agreement with a simple erfc distribution. The diffusion coefficient of As increases with an increase in the Ge content. The diffusion coefficient of Ge in strained Si is almost the same within errors, irrespective of Ge content.

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