Low Resistivity Thin Film Refractory Silicides Grown in Ultrahigh Vacuum at Low Temperature

Abstract
Refractory metal silicides, and , have been grown successfully on (100) silicon wafers in ultrahigh vacuum. It is demonstrated that an MBE‐like growth technique, i.e., metal evaporation on a clean heated monocrystal, yields device‐worthy thin film silicides of excellent electrical conductivity. For silicide films from 50 to 150 nm thick and substrate temperatures ranging from 750° to 900°C, resistivities as low as 65 μΩ cm for and 30 μΩ cm for are obtained. Similar resistivities for cosputtered silicides would require films 200–500 nm thick annealed at 1100°C for 30 min.

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