| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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InAlAs/InGaAs Pseudomorphic High Eelectron Mobility Transistors Grown by Molecular Beam Epitaxy on the InP Substrate |
| HUANG Jie1,2**, GUO Tian-Yi1, ZHANG Hai-Ying1, XU Jing-Bo1, FU Xiao-Jun1, YANG Hao1, NIU Jie-Bin1 |
1Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029
2School of Physical Science and Technology, Southwest University, Chongqing 400715
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HUANG Jie, GUO Tian-Yi, ZHANG Hai-Ying et al 2010 Chin. Phys. Lett. 27 118502 |
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Abstract A novel PMMA/PMGI/ZEP520 trilayer resist electron beam lithograph (EBL) technology is successfully developed and used to fabricate the 150 nm gate-length In0.7Ga0.3As/In0.52Al0.48As Pseudomorphic HEMT on an InP substrate, of which the material structure is successfully designed and optimized. A perfect profile of T−gate is successfully obtained. These fabricated devices demonstrate excellent dc and rf characteristics: the transconductance Gm, maximum saturation drain−to-source current IDSS, threshold voltage VT, maximum current gain frequency fT derived from h21, maximum frequency of oscillation derived from maximum available power gain/maximum stable gain and from unilateral power−gain of metamorphic InGaAs/InAlAs high electron mobility transistors (HEMTs) are 470 mS/mm, 560 mA/mm, -1.0 V, 76 GHz, 135 GHz and 436 GHz, respectively. The excellent high frequency performances promise the possibility of metamorphic HEMTs for millimeter-wave applications.
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| Keywords:
85.30.Tv
71.55.Eq
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Received: 07 June 2010
Published: 22 October 2010
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