Abstract

An organic source gas, tris-dimethyl-amino-silyl-azide (TDSA, [(CH3)2N]3SiN3), was newly synthesized and utilized for the deposition of a passivation film of sub-half-micrometer devices. Deposition temperature dependence of the film formed by plasma-enhanced chemical vapor deposition (PECVD) using TDSA was investigated and step coverage of the TDSA film was examined. As a result, it was clarified that hydrocarbon content in the film decreased with increasing deposition temperature. The bottom step coverage of the films formed using TDSA was greatly improved compared to that of the conventional silicon nitride film.

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