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In-Situ Patiterning and Regrowth of InP Based Heterostructures using a Native Oxide Mask

Published online by Cambridge University Press:  28 February 2011

Y. L. Wang ,
L. R. Harriott  and
H. Temkin
Y. L. Wang
Affiliation:
AT&T Bell Laboratories, 600 Mountain Ave., Murray Hill, New Jersey 07974
L. R. Harriott
Affiliation:
AT&T Bell Laboratories, 600 Mountain Ave., Murray Hill, New Jersey 07974
H. Temkin
Affiliation:
AT&T Bell Laboratories, 600 Mountain Ave., Murray Hill, New Jersey 07974
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Abstract

We have successfully used an ultrathin (20-50 Å) native oxide layer on the surface of InP as an etch mask for transferring patterns onto the substrate. The oxide mask is grown in situ in O2 atmosphere, and the mask pattern is created by locally removing the oxide with a focused ion beam. Depending on the thickness of the mask, the required ion dose varies from 2×1014 to 2×1015 Ga/cm2. C12 etches the exposed areas selectively. Features as deep as 3 microns have been produced with such an ultrathin mask. High quality InGaAs and InP epitaxial layers have been overgrown on such patterned substrate. We have studied the formation and desorption of the oxide mask with Auger analysis. We also demonstrate that the secondary charged particle emission from a substrate during ion exposure provides a useful signal for the determination of the required dose.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 198: Symposium V – Epitaxial Heterostructures , 1990 , 17
Copyright
Copyright © Materials Research Society 1990

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References

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