한철원 심광보 박용주 박승철 민석기 2024-01-22T00:08:47Z 2024-01-22T00:08:47Z 2022-01-10 1991-01 https://pubs.kist.re.kr/handle/201004/146976 Growth of GaAs crystal by an improved VGF apparatus. Article 3 Journal of Korean association of crystal growth., v.1, no.1, pp.17 - 25 Journal of Korean association of crystal growth. 1 1 17 25 VGF(vertical gradient freeze) crystal growth GaAs EL2 concentration dislocation