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Formation and Stability of NI(PT) Silicide on (100)SI and (111)SI

Published online by Cambridge University Press:  10 February 2011

D. Mangelinck ,
J. Y. Dai ,
S. K. Lahiri ,
C. S. Ho  and
T. Osipowicz
D. Mangelinck
Affiliation:
Institute of Materials Research and Engineering, Blk S7, level 3, National University of Singapore, Singapore 119260, d-mangelin@imre. Org. sg
J. Y. Dai
Affiliation:
Institute of Materials Research and Engineering, Blk S7, level 3, National University of Singapore, Singapore 119260, d-mangelin@imre. Org. sg
S. K. Lahiri
Affiliation:
Institute of Materials Research and Engineering, Blk S7, level 3, National University of Singapore, Singapore 119260, d-mangelin@imre. Org. sg
C. S. Ho
Affiliation:
Department of Electrical Engineering, National University of Singapore, Singapore 119260
T. Osipowicz
Affiliation:
Department of Physics, National University of Singapore, Singapore 119260
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Abstract

The effect of a small amount of Pt (5 at.%) on the thermal stability of NiSi film on (100)Si and (111 )Si has been investigated. Rutherford back scattering, Scanning Electron Microscopy, and X-ray diffraction have been used to study the formation, microstructure and orientation of the silicide. The addition of platinum results in increasing the disilicide nucleation temperature to 900°C and thus leads to a better stability of NiSi at high IC processing temperatures. The presence of Pt also induced a texture of the NiSi film both on (11 1)Si and (100)Si. The increase in thermal stability is explained in terms of nucleation controlled reaction concept and should open new possibilities for the use of NiSi in self aligned silicidation. The redistribution of Pt in the silicide is examined and explained in terms of kinetics and thermodynamics considerations. The addition of Pt also increases the temperature of agglomeration of NiSi.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 564: Symposium N – Advanced Interconnects and Contacts , 1999 , 163
Copyright
Copyright © Materials Research Society 1999

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