롤투롤 스퍼터 시스템을 이용하여 PET 기판위에 성막 시킨 ITO 박막의 특성 연구 (original) (raw)
2008, Korean Journal of Materials Research
The electrical, optical, structural and surface properties of an indium tin oxide (ITO) film grown on a flexible PET substrate using a specially designed roll-to-roll (R2R) sputtering system as a function of the DC power, Ar/O 2 flow ratio, and rolling speed is reported. It was observed that both the electrical and optical properties of the ITO film on the PET substrate were critically dependent on the Ar/O 2 flow ratio. In addition, x-ray diffraction examination results showed that the structure of the ITO film on the PET substrate was an amorphous structure regardless of the DC power and the Ar/O 2 flow ratio due to a low substrate temperature, which was maintained constant by a main cooling drum. Under optimized conditions, ITO film with resistivity of 6.44×10 -4 Ω-cm and transparency of 86% were obtained, even when prepared at room temperature. Furthermore, bending test results exhibited that R2R-grown ITO film had good flexibility which would be applicable to flexible displays and solar cells.
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고정밀 회전 및 축방향 이송을 위한 신개념 원통형 자기부상 스테이지
The Transactions of The Korean Institute of Electrical Engineers, 2012
In this paper, a conceptual design and a detailed design of novel cylindrical magnetic levitation stage is introduced. This is came from planar-typed magnetic levitation stage. The proposed stage is composed of cylinder-typed permanent magnet array and semi-cylinder-typed 3 phase winding module. When a proper current is induced at winding module, a magnetic levitation force between the permanent magnet array and winding module is generated. The proposed stage can precisely move the cylinder to rotations and translations as well as levitations with the magnetic levitation force. This advantage is useful to make a nano patterning on the surface of cylindrical specimen by using electron beam lithography under vacuum. Two methods are used to calculate required magnetic levitation forces. The one is 2D FEM analysis, the other is mathematical modeling. This paper shown that results of two methods are similar. An assistant plate is introduced to reduce required currents of winding module for levitations in vacuum. The mathematical model of cylindrical magnetic levitation stage is used for dynamic simulation of magnetic levitations. A lead-lag compensator is used for control of the model. Simulation results shown that the detail designed model of the cylindrical magnetic levitation stage with the assistant plate can be controlled very well.
적층복합재료 패널의 확률론적 비선형 초기파단하중 및 좌굴하중에 관한 연구
Journal of the Korea institute for structural maintenance and inspection, 2013
Probabilistic nonlinear first ply failure loads of flat composite panels and nonlinear buckling loads of curved composite panels with cutouts are estimated to provide the more reliable main load carrying structure in the renewable energy industry and offshore structures. The response surface method approximates limit state surface to a second order polynomial form of random variables with the results of deterministic finite element analyses at given sampling design points. Furthermore, the iterative linear interpolation scheme is used to obtain a more accurate approximation of the limit state surface near the most probable failure point (MPFP). The advanced first order second moment method and the Monte Carlo method are performed on an approximated limit state surface to evaluate the probability of failure. Finally, the sensitivity of the reliability index with respect to transformed random variables is investigated to figure out the main random variables that have an effect on failures.
조피볼락(Sebastes schlegeli) 치어 사료에 오징어(Sepia esculenta) 간 분말에 대한 어분대체 효과
Korean Journal of Fisheries and Aquatic Sciences, 2013
An 8-week feeding experiment was conducted to evaluate three types of squid Sepia esculenta liver powder (SLP) as a dietary protein source for replacement of fish meal (FM) in the juvenile black rockfish, Sebastes schlegeli. For replacement of FM, six experimental diets were formulated with 5 or 10% of either of three types (A, B, C) of SLP: SLP-A 5 , SLP-A 10 , SLP-B 5 , SLP-B 10 , SLP-C 5 , and SLP-C 10. One of the control diets contained 100% FM as the protein source, and the other was a commercial diet (Com). Fish with an average body weight of 6.50 0.03 g (mean SD) were allocated randomly in triplicate groups of 50 to aquaria and fed the experimental diets until satiation. The weight gain (WG) and specific growth rate (SGR) of fish fed the FM, SLP-A 5 , SLP-A 10 , and SLP-B 5 diets were higher than those of fish fed the Com, SLP-B 10 , SLP-C 5 and SLP-C 10 diets. No significant differences were observed in WG and SGR among the diet groups, with the exception of the SLP-C 10 diet group. The feed efficiency (FE) and protein efficiency ratio (PER) of fish fed the SLP-A 5 , SLP-A 10 , and SLP-B 5 diets did not differ from those fed the control diet. However, fish fed SLP-B 10 and SLP-C 10 had lower FE and PER than the fish fed the FM, commercial, SLP-A 5, SLP-A 10, and SLP-B 5 diets. Both the SLP-A and SLP-B diets, but not the SLP-C diets, replaced up to 10% and 5% of FM for juvenile black rockfish, respectively. The results of this experiment provide information that will assist in formulating an inexpensive and practical diet containing SLP for juvenile black rockfish.
세라믹칩 전기적 성능검사 시스템을 위한 고속구동 액튜에이터 개발
Journal of the Korea Academia-Industrial cooperation Society, 2011
The core of IT products, electronic components, especially the MLCC, chip inductors, chip Varistors and so on. In order to test the electrical characteristics of the chip using the Reno-pin contact test method has been used. In current chips, mass production of semiconductor manufacturing processes, high-speed production test for the chip speed up, precision is required. But Vibration displacement is a very short, so in order to overcome these shortcomings, the displacement amplification to design the structure has been actively studied. In this paper, a building structure with a flexible hinge was designed amplification instrument, semiconductor chip industry in the performance test and inspection equipment to measure the electrical characteristics of high speed linear actuators Reno-Pin using system was developed.
말콤 볼드리지 모형을 이용한 2차 의료기관의 전사적 품질관리와 성과 간의 인과관계 연구
Journal of the Korean society for quality management, 2015
Purpose: The purpose of this study is to lay groundwork for future research on the outcomes of national quality awards for secondary-care healthcare organizations. Methods: For this study, a secondary-care hospital was selected through a convenience sampling method and all of its organizational members participated in complete enumeration survey using 109 survey questions derived from the MBNQA criteria for healthcare through structural equation modeling (SEM) Results: As a result, Leadership was shown to drive Foundation and Direction, which affect System that creates Results with 12 hypotheses supported out of 18 hypotheses established. Conclusion: The findings of this study will provide valuable implications to the top management of secondary-care hospitals for self-examining quality management and promoting sustainable competitiveness
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