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Titanium Silicides and their Technological Applications

Published online by Cambridge University Press:  03 September 2012

L.A. Clevenger  and
R.W. Mann
L.A. Clevenger
Affiliation:
IBM T.J. Watson Research Center, Yorktown Heights, NY 10598
R.W. Mann
Affiliation:
IBM Microelectronics, Essex Junction, VT 05452
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Abstract

Titanium silicides are used as source, gate and drain contacts and local interconnections in CMOS integrated circuits. In these applications, it is important that the titanium silicide phase have a low resistivity (< 20μΩ-cm) and not agglomerate during high temperature processing. The Ti/Si system has two silicide phases that are useful for electronic applications, high resistivity C49-TiSi2 (60-70 μΩ-cm) which forms at 600 - 700°C and low resistivity (15-20 μΩ-cm) C54-TiSi2 which forms from 700 to 850°C. This paper will review how the size of the thermal annealing process window for forming low resistivity C54-TiSi2 from high resistivity C49-TiSi2 without having the silicide agglomerate varies with annealing treatments, electronic dopants, and contact size. In addition, processing methods to improve the size of the process window will be discussed.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 320: Symposium D – Silicides, Germanides, and Their Interfaces , 1993 , 15
Copyright
Copyright © Materials Research Society 1994

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References

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