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Proceedings Paper

Recent progress of large size and low dislocation bulk GaN growth
Author(s): Yutaka Mikawa; Takayuki Ishinabe; Yuji Kagamitani; Tae Mochizuki; Hirotaka Ikeda; Kenji Iso; Tatsuya Takahashi; Kohei Kubota; Yuuki Enatsu; Yusuke Tsukada; Satoru Izumisawa
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Paper Abstract

Large size and low dislocation density bulk gallium nitride (GaN) crystals were successfully grown by original acidic ammonothermal method SCAAT™ (Super Critical Acidic Ammonia Technology). It enabled us to obtain extremely high crystallinity true bulk GaN. In this article, 2-inch size non-polar m-plane GaN and nearly 4-inch size polar c-plane GaN were demonstrated. The dislocation and stacking fault density of m-plane GaN were in the range of 102 to 103 cm-2 and 0 to 5 cm-1, respectively. The full width at half maximum (FWHM) of X-ray rocking curve (XRC) on (10-12) plane was 6.4 arcsec. The dislocation density of c-plane GaN was in the range of 103 to 104 cm-2. The off-angle distribution of nearly 4-inch size c-plane GaN was ±0.006° in the span of 80 mm. The types of dislocations in the c-plane GaN were identified by transmission electron microscope (TEM) observation. Hydride vapor phase epitaxy (HVPE) growth on the SCAA™ c-plane seed was carried out and obtained 2-inch wafer. The crystallinity was comparable to SCAAT™ seed; FWHM of XRC was less than 10 arcsec and off-angle distribution was ±0.017°.

Paper Details

Date Published: 16 February 2020
PDF: 9 pages
Proc. SPIE 11280, Gallium Nitride Materials and Devices XV, 1128002 (16 February 2020); doi: 10.1117/12.2540737
Show Author Affiliations
Yutaka Mikawa, Mitsubishi Chemical Corp. (Japan)
Takayuki Ishinabe, Mitsubishi Chemical Corp. (Japan)
Yuji Kagamitani, Mitsubishi Chemical Corp. (Japan)
Tae Mochizuki, Mitsubishi Chemical Corp. (Japan)
Hirotaka Ikeda, Mitsubishi Chemical Corp. (Japan)
Kenji Iso, Mitsubishi Chemical Corp. (Japan)
Tatsuya Takahashi, Mitsubishi Chemical Corp. (Japan)
Kohei Kubota, Mitsubishi Chemical Corp. (Japan)
Yuuki Enatsu, Mitsubishi Chemical Corp. (Japan)
Yusuke Tsukada, Mitsubishi Chemical Corp. (Japan)
Satoru Izumisawa, Mitsubishi Chemical Corp. (Japan)


Published in SPIE Proceedings Vol. 11280:
Gallium Nitride Materials and Devices XV
Hiroshi Fujioka; Hadis Morkoç; Ulrich T. Schwarz, Editor(s)

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