Microfluctuations of oxygen impurity concentration as a reason of accelerated oxygen diffusion in silicon

Activation energy of thermal donors annealing increases from 1.7 to 2.5 eV on preliminary heat treatment of the Si crystals at 800⁰C. It is believed that this fact results from the dissolution of oxygen microfluctuations that are considered to be sources of intrinsic elastic strains and thereby to lie at the basis of locally accelerated oxygen diffusion