The effects of electric field and doping species on directional crystallization of a-Si channels under high-density current stressing have been investigated. The a-Si channels were implanted by 30 keV View the MathML source or As+ to a dose of 3 × 1015 ions/cm2. A preferential growth of poly-Si from anode toward cathode was found on View the MathML source, As+ and un-implanted a-Si samples. The results indicate that directional growth of poly-Si is caused by the strong electric field effect on positively charged Ni ions under high-density current stressing.
Nuclear Instruments and Methods in Physics Research Section B 237, pp.167-173