Gas-source MBE growth of metamorphic InP/In0.5Al0.5As/In0.5Ga0.5As/InAsP high-electron-mobility structures on GaAs substrates

被引:0
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作者
Ouchi, K [1 ]
Mishima, T [1 ]
Kudo, M [1 ]
Ohta, H [1 ]
机构
[1] Hitachi Ltd, Cent Res Lab, Kokubunji, Tokyo 1858601, Japan
关键词
D O I
10.1109/ICIPRM.2001.929016
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Advanced metamorphic high-electron-mobility heterostructures were grown by gas-source molecular beam epitaxy (gas-source MBE). These structures consist of an InGaAs/InAsP composite channel layer to improve breakdown voltage and a thin InP stopper layer under the n-InGaAs contact layer to enable long-term reliability and highly selective etching for mass production. Even though the graded buffer layer was thin, 0.45 mum misfit dislocations, observed by transmission-electron microscopy (TEM), were confined effectively to this thin buffer layer. High mobilities of over 9000 cm(2)/Vs were obtained on the thin compositionally graded InAlAs buffer layer when the As composition of the InAsP sub-channel layer was less than 0.2.
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页码:51 / 54
页数:4
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