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펄스형 진공 아크법에 의한 ZnO 박막의 상온합성 및 이의 전기적 특성에 미치는 산소분압비의 영향
신민근(Min-Geun Shin),변응선(Eungsun Byon),이성훈(Sunghun Lee),김도근(Do-Geun Kim),전상조(Sang-Jo Jeon),구본흔(Bon Heun Koo) 한국표면공학회 2005 한국표면공학회지 Vol.38 No.5
Highly c-axis oriented Zinc oxide (ZnO) films were successfully deposited at room temperature by oxygen ion-assisted pulsed filtered vacuum arc. The effect of oxygen gas ratio (O₂/O₂+Ar) on the preferred orientation, surface morphology and resistivity of the ZnO films were investigated. Highly crystalline ZnO films with (002) orientation were obtained at over 13% of oxygen gas ratio. Increasing oxygen gas ratio up to 80% was found to improve crystallinity of the films. From hall measurements, it was found that the film has n-type characteristic and carrier concentration and its mobility were closely related with oxygen gas ratio. Minimal resistivity of 3.6×10<SUP>-3</SUP> Ωㆍ㎝ was obtained in the range of 20% to 40% of oxygen gas ratio.
ZnO 박막의 전기적 구조적 특성에 미치는 수소 분압비의 영향
이성훈(Sunghun Lee),신민근(Min-Geun Shin),변응선(Eungsun Byon),김도근(Do-Geun Kim),전상조(Sang-Jo Jeon),구본혼(Bon Heun Koo) 한국표면공학회 2006 한국표면공학회지 Vol.39 No.6
Effect of hydrogen partial pressure ratio on the structural and electrical properties of highly c-axis oriented ZnO films deposited by oxygen ion-assisted pulsed filtered vacuum arc at a room temperature was investigated. The hydrogen partial pressure ratio were 1.4%~9.8% at 40% oxygen pressure ratio. The conductivity of ZnO:H films was increased from 1.4% up to 4.2% due to relatively high carrier mobility caused by improvement of crystallinity. While the conductivity of ZnO:H films were decreased over than 4.2% and (0002) orientation was also deteriorated. The lowest resistivity of ZnO:H films was 2.5 × 10?³ Ωㆍ㎝ at 4.2% of hydrogen pressure ratio. Transmittance of ZnO:H films in visible range was 85% which is lower than that of undoped ZnO films because of declined preferred orientation.
한방병원에 내원한 교통사고 외래환자에 있어서 사고규모와 치료기간 및 치료비용 간의 상관관계에 대한 연구
박지용 ( Ji Yong Park ),홍남중 ( Nam Jung Hong ),이민정 ( Min Jung Lee ),안지훈 ( Ji Hoon Ahn ),신유빈 ( You Bin Shin ),김병정 ( Byung Jung Kim ),신민근 ( Min Geun Shin ),하인혁 ( In Hyuk Ha ),이진호 ( Jin Ho Lee ) 한방재활의학과학회 2014 한방재활의학과학회지 Vol.24 No.1
ObjectivesThe purpose of this study is to investigate the corelation between traffic acci-dent severity and treatment period and cost by traffic accident.MethodsOutpatients who visited Jaseng Korean medicine hospital traffic accident clinic were investigated by hospital computer system about period and cost of treatment. And we requested for repair cost of car, a sort of car groups and agreement date with car in-surance company to insurance company. Therefore we could analysis statistical correlation of traffic accident severity (repair cost of car) with period of treatment, cost of treatment, number of treatment in same sort of car groups. For statistics, we used SPSS version 18.0 for windows.ResultsA significant positive correlation was found between traffic accident severity (repair cost of car) with repair cost of car, cost of treatment and number of treatment in semi-midsize car, midsize car group. But, any significant correlation wasn`t found between traffic accident severity (repair cost of car) with repair cost of car, cost of treatment and number of treatment in small car, full-sized car group. In SUV (sport utility vehicle) car group some significant correlation was found, but it isn`t between traffic accident severity (repair cost of car) with repair cost of car, cost of treatment and number of treatment.ConclusionsIt was found that traffic accident severity (repair cost of car) had an effect on cost of car, cost of treatment and number of treatment by statistical analysis. But, it was also suggested strongly that other factors like a cost of car and ages had an effect on them. (J Korean Med Rehab 2014;24(1):65-76)