Byun Dongjin 김현정 김주성 KOH SEOK KEUN CHOI WON-KOOK Park Dal keun Kum Dong Wha 2024-01-13T18:30:33Z 2024-01-13T18:30:33Z 2021-09-29 https://pubs.kist.re.kr/handle/201004/109926 English GaN-growth Sapphire surface modified by reactive ion beam Conference 1 Proc. 2nd Intern. Symp. on blue laser and light emitting diodes, Chiba, Japan, Sept. 29-Oct. 2, 1998, pp.97 - 100 Proc. 2nd Intern. Symp. on blue laser and light emitting diodes, Chiba, Japan, Sept. 29-Oct. 2, 1998 97 100 JA