Premium
Properties of ZrN films as substrate masks in liquid phase epitaxial lateral overgrowth of compound semiconductors
Author(s) -
Dobosz D.,
Golaszewska K.,
Zytkiewicz Z. R.,
Kaminska E.,
Piotrowska A.,
Piotrowski T. T.,
Barcz A.,
Jakiela R.
Publication year - 2005
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200410373
Subject(s) - epitaxy , materials science , substrate (aquarium) , liquid phase , optoelectronics , electrical resistivity and conductivity , resistive touchscreen , semiconductor , phase (matter) , nanotechnology , layer (electronics) , chemistry , electrical engineering , oceanography , physics , engineering , organic chemistry , thermodynamics , geology
The usefulness of ZrN films as masks for epitaxial lateral overgrowth of GaAs and GaSb by liquid phase epitaxy is studied. It was observed that during the growth process ZrN masks are mechanically stable, they adhere strongly to the substrate and do not show any signs of degradation even at the growth temperature as high as 750 °C. Moreover, perfect selectivity of GaAs and GaSb epitaxy was obtained on ZrN masked substrates ensuring the growth wide and thin layers. To study the influence of growth conditions on electrical resistivity of the mask, ZrN films deposited on GaAs substrates were annealed in various atmospheres. It was found that at temperatures higher than about 580 °C the ZrN masks become highly resistive when heat‐treated in hydrogen flow employed during growth. Usually, LPE growth temperature for GaAs is higher. Thus, ELO growth of GaAs by LPE becomes more difficult, though still possible, if ZrN masks are to be applied as buried electrical contacts. For GaSb ELO layers however, typical LPE growth temperature is about 480 °C. This allows us to grow high quality GaSb ELO layers by LPE still preserving high electrical conductivity of ZrN mask. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)