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Scanning Tunneling Microscopy of HF-Controlled Si(111) Surfaces

Published online by Cambridge University Press:  25 February 2011

Hiroshi Tokumoto ,
Yukinori Morita  and
Kazushi Miki
Hiroshi Tokumoto
Affiliation:
Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba, Ibaraki 305, Japan
Yukinori Morita
Affiliation:
Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba, Ibaraki 305, Japan
Kazushi Miki
Affiliation:
Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba, Ibaraki 305, Japan
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Abstract

Scanning tunneling microscopy (STM) was made in order to examine the surface structure and roughness in an atomic scale. The surfaces were prepared by several ways: NH4F (pH = 8) dipping just after RCA cleaning or after keeping in dry air for a few weeks; dipping into NH4F (pH = 8) solution or dipping into solutions with pH=10 just after boiling in HNO3. The STM images clearly showed that the surface structure and roughness are dependent on the sample treatments. The smooth surfaces with less defects were obtained for surfaces prepared by removing the HNO3-oxidized layer by NH4F (pH = 8) dipping.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 259: Symposium B – Chemical Surface Preparation, Passivation and Cleaning for Semiconductor Growth and Processing , 1992 , 409
Copyright
Copyright © Materials Research Society 1992

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References

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