Synthesis, characterization, and thermal properties of silicon(IV) compounds containing amidinate ligands as CVD precursors

GRAPHICAL ABSTRACT

ABSTRACT

The title compounds of the type R-C(=NⁱPr) (-N′ ⁱPrSiMe₃) (with R = Me or ⁿBu) as potential chemical vapor deposition (CVD) precursors have been synthesized and characterized by ¹H, ¹³C, and ²⁹Si NMR spectroscopy as well as by EI-MS and elemental analysis where necessary. Thermal properties, including stability, volatility, transport behavior, and vapor pressure, were evaluated by thermogravimetric analysis to confirm that they are suitable for the CVD procedure. Deposition was accomplished in a hot wall CVD reactor system, which qualitatively verified the ability of these compounds as CVD precursors.

KEYWORDS:

• Synthesis
• amidinate
• silicon(IV) compounds
• thermal properties
• CVD precursors

Funding

We gratefully acknowledge financial support for this work by the National Natural Science Foundation of China (No. 21371080) and the Fundamental Research Funds for the Central Universities (JUSRP51627B).