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The Role of Unprecracked Hydride Species Adsorbed on The GaAs(100) in The Growth of GaAs by Ultrahigh Vacuum Chemical Vapor Deposition Using Trimethylgallium and Triethylgallium

Published online by Cambridge University Press:  22 February 2011

Seong-Ju Park ,
Jeong-Rae Ro ,
Jae-Ki Sim ,
Jeong Sook Ha  and
El-Hang Lee
Seong-Ju Park
Affiliation:
Electronics and Telecommunications Research Institute, P.O. Box 8, Daeduk Science Town, Daejeon City, 305-606. Republic of, Korea
Jeong-Rae Ro
Affiliation:
Electronics and Telecommunications Research Institute, P.O. Box 8, Daeduk Science Town, Daejeon City, 305-606. Republic of, Korea
Jae-Ki Sim
Affiliation:
Electronics and Telecommunications Research Institute, P.O. Box 8, Daeduk Science Town, Daejeon City, 305-606. Republic of, Korea
Jeong Sook Ha
Affiliation:
Electronics and Telecommunications Research Institute, P.O. Box 8, Daeduk Science Town, Daejeon City, 305-606. Republic of, Korea
El-Hang Lee
Affiliation:
Electronics and Telecommunications Research Institute, P.O. Box 8, Daeduk Science Town, Daejeon City, 305-606. Republic of, Korea
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Abstracts

We have grown GaAs epilayers by ultrahigh vacuum chemical vapor deposition(UHVCVD) using adsorbed hydrides and metalorganic compounds via a surface decomposition process. This result indicates that unprecracked arsine(AsH3) can be used in chemical beam epitaxy(CBE) and that a new hydride source with a low decomposition temperature, monoethylarsine(MEAs) can replace the precracked AsH3 source in CBE. The impurity concentrations in GaAs grown with trimethylgallium(TMG) and triethylgallium(TEG) were found to be very sensitve to growth temperature. It was also found that the uptake of carbon impurity is significantly reduced when TMG is replaced with TEG. The carbon concentrations in epilayers grown using TMG and TEG with unprecracked AsH3 and MEAs were reduced by 2-3 orders of magnitude compared to those by CBE process employing TMG and arsenics from precracked hydrides. We have also found that the hydrogen atoms play an important role in the reduction of carbon content in GaAs epilayer. Intermediates like dihydrides from MEAs decomposed on the surface are considered to supply hydrogen atoms and hydrides during growth, which may remove other carbon containing species.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 334: Symposium W – Gas-Phase and Surface Chemistry in Electronic Materials Processing , 1993 , 183
Copyright
Copyright © Materials Research Society 1994

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References

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