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Experimental Study of Etched Back Thermal Oxide for Optimization of the Si/High-k Interface

Published online by Cambridge University Press:  17 March 2011

N. Moumen
Affiliation:
IBM Assignee International SEMATECH, Austin, TX
J. Gutt
Affiliation:
AMD assignee International SEMATECH, Austin, TX
M. Gardner
Affiliation:
AMD assignee International SEMATECH, Austin, TX
C. Huffman
Affiliation:
Texas Instruments assignee International SEMATECH, Austin, TX
P. Majhi
Affiliation:
Philips assignee International SEMATECH, Austin, TX
H.-J. Li
Affiliation:
Infineon assignee International SEMATECH, Austin, TX
B.H. Lee
Affiliation:
IBM Assignee International SEMATECH, Austin, TX
G. Bersuker
Affiliation:
Infineon assignee International SEMATECH, Austin, TX
P. M. Zeitzoff
Affiliation:
Infineon assignee International SEMATECH, Austin, TX
R.W. Murto
Affiliation:
Texas Instruments assignee International SEMATECH, Austin, TX
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Abstract

We have demonstrated a uniform, robust interface for high-k deposition with significant improvements in device electrical performance compared to conventional surface preparation techniques. The interface was a thin thermal oxide that was grown and then etched back in a controlled manner to the desired thickness. Utilizing this approach, an equivalent oxide thickness (EOT) as low as 0.87 nm has been demonstrated on high-k gate stacks having improved electrical characteristics as compared to more conventionally prepared starting surfaces.

Type
Research Article
Copyright
Copyright © Materials Research Society 2004

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References

REFERENCES

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