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New chemical solutions for the etching of (011) oriented V-grooves in InP(001) for CSBH laser diodes

Published online by Cambridge University Press:  31 January 2011

D. T. C. Huo ,
M. F. Van  and
J. D. Wynn
D. T. C. Huo
Affiliation:
AT&T Bell Laboratories, Murray Hill, New Jersey 07974
M. F. Van
Affiliation:
AT&T Bell Laboratories, Murray Hill, New Jersey 07974
J. D. Wynn
Affiliation:
AT&T Bell Laboratories, Murray Hill, New Jersey 07974
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Abstract

We have developed two new etchant systems by adding H2O2 and HBr into the conventional HCI–H3PO4 etchant for the fabrication of InP-based channeled substrate heterostructure (CSBH) lasers. These etchants do not erode photoresists and they provide high quality etched side walls. The etch factors for the new etchant systems based on HBr and H2O7 are 17% and 12% higher than that of the: conventional 5HCI–H3PO4 etchant, respectively. These high etch factors give a narrow V-groove in InP and they lead to a lower magnitude and a better control of the threshold current of CSBH lasers.

Type
Articles
Information
Journal of Materials Research , Volume 4 , Issue 4 , August 1989 , pp. 857 - 862
Copyright
Copyright © Materials Research Society 1989

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References

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