کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1530765 | 1511998 | 2009 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Dopant enhanced H diffusion in amorphous silicon and its effect on the kinetics of solid phase epitaxy Dopant enhanced H diffusion in amorphous silicon and its effect on the kinetics of solid phase epitaxy](/preview/png/1530765.png)
Dopant enhanced H infiltration into surface amorphous Si (a-Si) layers formed by ion implantation is reported. Dopant enhanced H in-diffusion is observed for both B and P implant profiles in a-Si and the effect of this enhanced in-diffusion on the kinetics of solid phase epitaxial (SPE) crystallization is quantified. Near-surface dopant profiles were formed by multiple energy ion implantation. Anneals were performed in air over the temperature range 500–640 °°C. Secondary ion mass spectrometry (SIMS) analysis of partially annealed samples reveals that implanted dopants enhance the in-diffusion of H thereby increasing its concentration at depths well beyond the dopant implanted region. The effect of an enhanced H concentration on crystallization rates via SPE is monitored using time resolved reflectivity. Boron is found to enhance both H diffusion and SPE to a much greater extent than P. Possible links between the SPE and H diffusion mechanisms are discussed and the possibility of applying SPE models to H diffusion is explored. Implications for the formation of shallow junctions are also considered.
Journal: Materials Science and Engineering: B - Volume 157, Issues 1–3, 15 February 2009, Pages 6–10