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Published on: August 22, 2017
Characterization of crystallographic properties of SMC poly Si using electron backscattered diffraction
1School of Materials Science & Engineering, Seoul National University ENG445, San 56-1, Shilim-dong, Kwanak-ku, Seoul 151-744, Korea. dkim@imm.rwth-aachen.de
Abstract:
Crystallographic properties of silicide mediated crystallization (SMC) polycrystalline silicon (poly Si) and excimer laser annealing (ELA) poly Si were studied by electron backscattered diffraction. Large-grain sized poly Si with a large fraction of low-angle grain boundaries was acquired by SMC, and small-grain sized poly Si with high-angle grain boundaries especially around 60 degrees was acquired by ELA. The thin film transistor (TFT) device characteristics were investigated in view of short-range crystallinity (pattern quality) and long-range crystallinity (misorientation distribution) of the specimens. Short-range crystallinity did not significantly affect the TFT device characteristics, and long-range crystallinity considering the low energy level of special boundaries could be better related to the TFT device characteristics of poly Si.
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