Abstract
The two-step atomic layer deposition of tantalum nitride (TaN) in which the deposition cycle involved two chemical reaction steps, the formation of elemental tantalum (Ta) by reducing tantalum-pentafluoride (TaF5) with hydrogen plasma and the subsequent nitridation of the preformed Ta with NH 5 , was performed at 350°C. Cubic-TaN with a Ta/N ratio of 1:1 was achieved independently of the nitridation time, and the fluorine content of the films was below the detection limit using Auger electron spectroscopy. As a result, the electrical resistivity of the TaN film was reduced below 500 μΩ cm by suppressing the formation of Ta 3 N 5 .
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