B Diffusion In Implanted Ni2si And Nisi Layers
APPLIED PHYSICS LETTERS(2010)
摘要
B diffusion in implanted Ni2Si and NiSi layers has been studied using secondary ion mass spectrometry, and compared to B redistribution profiles obtained after the reaction of a Ni layer on a B-implanted Si(001) substrate, in same annealing conditions (400-550 degrees C). B diffusion appears faster in Ni2Si than in NiSi. The B solubility limit is larger than 10(21) atom cm(-3) in Ni2Si, while it is similar to 3x10(19) atom cm(-3) in NiSi. The solubility limit found in NiSi is in agreement with the plateau observed in B profiles measured in NiSi after the reaction of Ni on B-implanted Si.
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关键词
annealing, boron, diffusion, doping profiles, ion implantation, metallic thin films, nickel alloys, secondary ion mass spectra, silicon alloys, solubility, surface chemistry
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