Chin. Phys. Lett.  2008, Vol. 25 Issue (7): 2677-2679    DOI:
Original Articles |
Measurement and Analysis of Composition and Depth Profile of H in Amorphous Si1-xCx:H Films
HUA Wei, YAO Shu-De, WANG Kun, DING Zhi-Bo
Department of Technical Physics, School of Physics, Peking University, Beijing 100871
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HUA Wei, YAO Shu-De, WANG Kun et al  2008 Chin. Phys. Lett. 25 2677-2679
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Abstract Composition in amorphous Si1-xCx:H heteroepitaxial thin films on Si (100) by plasma enhanced chemical vapour deposition (PECVD) is analysed. The unknown x (0.45--0.57) and the depth profile of hydrogen in the thin films are characterized by Rutherford backscattering spectrum (RBS), resonance-nuclear reaction analysis (R-NRA) and elastic recoil detection (ERD), respectively. In addition, the depth profile of hydrogen in the unannealed thin films is compared to that of the annealed thin films with rapid thermal annealing (RTA) or laser spike annealing (LSA) in nitrogen atmosphere. The results indicate that the stoichiometric amorphous SiC can be produced by PECVD when the ratio of CH4/SiH4 is approximately equal to 25. The content of hydrogen decreases suddenly from 35% to 1% after 1150°C annealing. RTA can reduce hydrogen in SiC films effectively than LSA.
Keywords: 82.80.Yc      68.55.Ln      81.40.Ef     
Received: 24 February 2008      Published: 26 June 2008
PACS:  82.60.Yc  
  68.55.Ln (Defects and impurities: doping, implantation, distribution, concentration, etc.)  
  81.40.Ef (Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2008/V25/I7/02677
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