Polycrystalline silicon layers have been deposited by a chemical vapor deposition technique using $SiCl_4$, $H_2$ gas mixture on single crystal silicon substrates. In this work, the effects of depostion temperature and total flow rate on the deposition rate of polycrystalline silicon are investigated. From the experimental results it was found that the formation reaction of polycrystalline silicon was limited by surface reaction and mass transfer controlled as the deposition temperature was increased. The morphology of polycrystalline silicon layer changed from a fine structure to a coarse one as the deposition temperature was increased.
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