Characterization of AlInN layer grown on GaN/sapphire substrate by MOCVD

Wei Ching Huang, Edward Yi Chang*, Yuen Yee Wong, Kung Liang Lin, Yu Lin Hsiao, Chang Fu Dee, Burhanuddin Yeop Majlis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The AlInN layers have been grown with different growth parameters on GaN/sapphire substrates by metal-organic chemical vapor deposition (MOCVD). The effects of growth parameters such as pressure and temperature on the Al incorporation during AlInN material growth have been investigated. The results showed that lower pressure provides a tendency for higher Al incorporating in the AlInN layer. Besides, as the temperature was increased from 700°C to 780°C, an estimation of 4% reduction on the indium composition has been observed for each 20°C increment. XRD analysis showed that the best crystal quality of AlInN occured at 80% Al composition because of the higher lattice matching with GaN. Based on the above criteria, an Al0.8In 0.2N/GaN HEMT device with 2 μm gate length has also been fabricated. The DC characteristics showed a saturated current, Idss of 280 mA/mm and transconductance of 140 mS/mm.

Original languageEnglish
Pages (from-to)247-250
Number of pages4
JournalSains Malaysiana
Volume42
Issue number2
StatePublished - 1 Feb 2013

Keywords

  • AlInN layer
  • GaN
  • MOCVD

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