Oxidation of Si surfaces

Abstract
The oxide thickness for Si wafers of different doping species and densities has been measured from 30 to 1000 Å for dry O2 oxidation at 900 °C. The transition from the linear to parabolic oxide growth rate occurs near 300 Å with measured rate constants of 6 Å/min and 2500 Å2/min, respectively. Carbon in graphitic form was found on the surface of the wafers prior to oxidation. This changed to a carbide‐type form after oxidation and remained at the Si‐SiO2 interface.

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