Electrical demonstration of thermally stable Ni silicides on Si1-xCx epitaxial layers
2010
In this paper we report on electrical demonstration of thermally stable Ni silicides. It has been shown that when a sacrificial Si"1"-"xC"x epilayer is grown in the source-drain areas of NMOS transistors prior to silicidation, Ni silicides can withstand a 30min anneal at 750^oC and demonstrate excellent electrical performance. We have observed carbon segregation at the NiSiC/Si"1"-"xC"x interface which can explain the increased NiSiC thermal stability. We have experimentally demonstrated feasibility of CMOS device implementation of thermally stable Ni silicides.
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