Recent progress of large size and low dislocation bulk GaN growth

Yutaka Mikawa; Takayuki Ishinabe; Yuji Kagamitani; Tae Mochizuki; Hirotaka Ikeda; Kenji Iso; Tatsuya Takahashi; Kohei Kubota; Yuuki Enatsu; Yusuke Tsukada; Satoru Izumisawa

doi:10.1117/12.2540737

16 February 2020 Recent progress of large size and low dislocation bulk GaN growth

Yutaka Mikawa, Takayuki Ishinabe, Yuji Kagamitani, Tae Mochizuki, Hirotaka Ikeda, Kenji Iso, Tatsuya Takahashi, Kohei Kubota, Yuuki Enatsu, Yusuke Tsukada, Satoru Izumisawa

Author Affiliations +

Proceedings Volume 11280, Gallium Nitride Materials and Devices XV; 1128002 (2020) https://doi.org/10.1117/12.2540737
Event: SPIE OPTO, 2020, San Francisco, California, United States

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°.

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Yutaka Mikawa, Takayuki Ishinabe, Yuji Kagamitani, Tae Mochizuki, Hirotaka Ikeda, Kenji Iso, Tatsuya Takahashi, Kohei Kubota, Yuuki Enatsu, Yusuke Tsukada, and Satoru Izumisawa "Recent progress of large size and low dislocation bulk GaN growth", Proc. SPIE 11280, Gallium Nitride Materials and Devices XV, 1128002 (16 February 2020); https://doi.org/10.1117/12.2540737

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