Damage in silicon exposed to magnetron plasma has been investigated. The damage was characterized by Schottky barrier height measurements. The depths of the damaged layers were determined as a function of radio frequency (RF) power. It was found that the damaged layer at RF power of 2 kW (self-bias; 270 V) is about 12 nm, and that the damage depths correlate with the self-bias voltage, which is a measure of the energy of ions impinging on the Si surface during plasma exposure. Several methods for removal of the damaged layer have been examined; wet Si etching was found to be the most suitable one
Published in:
Components, Hybrids, and Manufacturing Technology, IEEE Transactions on
(Volume:13
,
Issue:
4
)
Date of Publication: Dec 1990