Abstract

Electron microscopic studies and the electrical properties of Pt contacts on n-type Si annealed by conventional furnace and rapid thermal annealing (RTA) were investigated with scanning electron microscopy, transmission electron microscopy, x-ray analysis, capacitance-voltage, and deep-level transient spectroscopy measurements. An incomplete reaction between Pt and Si is observed after furnace annealing at 550 °C due to the presence of oxygen in the ambient. An almost complete reaction between Pt and Si is achieved after silicidation by RTA at 550 °C. An acceptorlike level located 0.11 eV below the conduction-band edge with a concentration of 2×1013 cm−3 is detected only after furnace annealing at 550 °C. Silicidation by RTA at 550 °C does not introduce traps in the Si band gap.

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