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고주파 반응성 스퍼터링에 의해 제작된 InN 박막의 특성
김영호,최영복,정성훈,홍필영,문동찬,김선태,Kim, Young-Ho,Choi, Young-Bok,Chung, Sung-Hoon,Hong, Pil-Young,Moon, Dong-Chan,Kim, Sun-Tae 한국전기전자재료학회 1998 전기전자재료학회논문지 Vol.11 No.7
Thin film deposition of InN, which is a less-studied III-nitride compound semiconductor because of the difficulty if crystal growth, was performed by rf reactive sputtering method using In target and $N_2$reactive gas. The structrual, electrical, and optical properties of the produced films were measured and disussed according to the sputtering parameters such as deposition pressure, rf power, and substrate temperature. From the result of deposition pressure, rf power, and substrate temperature, we could obtain optimal conditions of 5m Torr, 60W, $60^{\circ}C$ for preparing InN thin film with high crystallinity, low carrier concentration, and high Hall mobility. The carrier concentration, Hall mobility, and optical bandgap of the fabricated InN thin films at optimal condition were $6.242\times10^{18}cm^{-3}, 212.526cm^2/V\cdot$s, and 1.912eV, respectively.
쌀가루 분쇄 방법 및 입자 크기에 따른 백설기의 품질특성
이명기 ( Myeong Gi Lee ),손성호 ( Sung Ho Son ),정명근 ( Myoung Gun Choung ),김선태 ( Sun Tae Kim ),고종민 ( Jong Min Ko ),한원영 ( Won Young Han ),윤원병 ( Won Byong Yoon ) 한국산업식품공학회 2015 산업 식품공학 Vol.19 No.1
The milling characteristics of rice using different milling methods (dry and wet) were investigated. Generally, average particle sizes of dry-milling flours were bigger than those of wet-milling flours due to low moisture content. Three theoretical models for milling, such as the Rittinger, Kick, and Bond model, were applied to characterize the milling process of rice. The wet-milling method showed higher value milling constants including Bond’s work index. Baeksulgi was used to study the effect of the milling method and particle size on rice flour’s physicochemical property (water content, color value, and texture). Moisture content and hardness of Baeksulgi were smaller as the particle size became smaller. L value of Baeksulgi was greater as the particle size became smaller. The energy requirement for the milling of grains to obtain a suitable size of particles was estimated by the grinding models. The results of our study might provide a systematic way to estimate the energy requirement to obtain a suitable particle size by milling.