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Carrier‐lifetime control of photochemical dry etching using elevated impurity concentrations

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4 Author(s)
Ashby, C.I.H. ; Sandia National Laboratories, Albuquerque, New Mexico 87185 ; Myers, D.R. ; Vawter, G.A. ; Biefeld, R.M.

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Virtually total suppression of carrier‐driven photochemical etching of semi‐insulating GaAs, n‐GaAs, and n+‐GaAs has been achieved by indiffusion of Zn to a surface carrier concentration greater than 1020/cm3. This technique for photochemical reaction suppression can be used as a self‐aligned etching technology for semiconductor device fabrication.

Published in:
Applied Physics Letters  (Volume:55 ,  Issue: 11 )

Date of Publication: Sep 1989

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