Effect of native oxide on the interface property of GaAs MIS structures

Abstract
Interface native oxide has been found to cause anomalous frequency dispersion of capacitance in the accumulation region of n‐GaAs MIS structures. Sputter etching by nitrogen is effective to remove the native oxide layer and obtain normal CV characteristics by probably reducing surface‐state density. The present results indicate that native oxide would not be essentially suitable for passivation of GaAs with low surface‐state density.
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