• Proceedings of the KIEE Conference
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• 1997.07d
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• pp.1469-1471
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• 1997

In this study, Organic electroluminescent(EU devices with multilayer structures were fabricated using tris (8-hydroxy quinolinate) aluminum($Alq_3$) as an electron-tran sporting emitting layer and TPD(N,N'-diphenyl-N,N'-bis(3-methylphenyl)-[1,1'-biphenyl]-4,4'-diamine : aromatic diamine) as a hole-transporting layer. A cell with a structure of glass substrate/indium-tin-oxide(ITO)/$Alq_3$/TPD/Mg:In exhibited bright green electroluminescence from the TPD layer. The peak intensity of TPD and $Alq_3$ different from spin coating and vacuum evaporation. The peak emission energy shifts to a higher energy with deposition technique. An emission peak at 500nm was achieved at a driving voltage of 30V.

• Journal of the Korea Furniture Society
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• v.11 no.1
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• pp.37-44
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• 2000

This work was done to investigate problems of cashew coating in a wooden-art industry such as ritual vessels and to improve a curing property of cashew film. The main problem in the cashew coating industry was a small-scale business, insufficiency of facilities, lack of knowledge about cashew resin and painting, and lack of a technology of productivity improvement by accelerated drying time of cashew film. In present, cashew coating for ritual vessels mostly used the petroleum as a thinner. The time of set to touch of cashew film thinning with petroleum on glass plates was increased with the increasement of the thinning proportion, but retarded from 3 to 11 times compared to that of an exclusive thinner according to thinning level. The addition of 20% aceton to petroleum contributed to the high reduction rate up to about 60% at the thinning level of 100%, which was effective to accelerate the drying time of cashew film. Even though only the petroleum or the petroleum-aceton(20%) mixture was used as a thinner, it did not exhibit any distinguishable differences in crack and appearance of cashew-film coated on Frexinus rhynchophylla after 5 cycles of soak under the vacuum-drying treatment.

• Proceedings of the Korean Society Of Semiconductor Equipment Technology
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• 2005.05a
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• pp.168-172
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• 2005

본 연구에서는 평판 디스플레이 Photo공정 중에서 무회전 도포(Spinless Coating)방식으로 기판(Glass)에 감광제 약액을 도포한 후 용매(Solvent)를 제거시키기 위한 진공건조장치(Vacuum dryer)에서 감광제 도포막의 품질에 영향을 주지 않는 범위 안에서의 용매 제거시간을 단축하기 위한 진공챔버의 용적에 따른 진공포트의 크기 및 배치에 대한 최적화를 구현하였다. 구현된 챔버의 용적과 진공포트의 크기 및 배치를 바탕으로 진공건조장치를 챔버, 챔버 구동부, 기판 구동부, 진공펌프, 그리고 $N_2$ 공급부로 모듈화하여 구성하였으며. 실제 도포 기판을 이용하여 진공건조를 실시한 후 도포막을 검사함으로써 진공포트에 대한 최적화를 검증함과 동시에 진공건조 능력을 확인하였다.

• Applied Science and Convergence Technology
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• v.25 no.6
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• pp.145-148
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• 2016

This paper, Al-doped ZnO(AZO) thin films for application as transparent conducting oxide films were deposited on the Corning glass substrate by using RF magnetron sputtering system. The effects of various Argon gas flow rates on optical and electrical characteristics of AZO films were investigate sputtering method. The Carrier Concentration is enhanced as Ar gas rate increases, and also the oxygen vacancy concentration. The figure of merit obtained in this study means that AZO films which deposited Ar gas rate of 75 sccm have the highest Carrier concentration and Hall mobility, which have the highest photoelectrical performance that it could be used as transparent electrodes.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.87-90
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• 2007

VIATRON TECHNOLOGIES has developed an $\underline{A}$tmospheric $\underline{M}$etal $\underline{D}$oping (AMD) system which uniformly dopes metal species onto a substrate. The AMD system injects metal-organic vapor over substrate using an injection head with a scan motion. One of important application of this system is a metalinduced crystallization of amorphous Si for manufacturing AMOLED poly-Si panels. The AMD system with a use of Ni vapor source produces doping of trace amount of Ni onto amorphous Si, enabling uniform MIC crystallization. Also, the operation without vacuum condition offers advantages such as easy maintenance, low cost production, and large glass processes.

• Progress in Superconductivity and Cryogenics
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• v.13 no.2
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• pp.17-20
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• 2011

Superconducting magnetic energy storage (SMES) has attracted a great deal of interest from the viewpoint of energy saving. The magnet of conduction-cooled high temperature superconducting (HTS) SMES is cooled down by a cryocooler. One of the most important problems to be assured the protection of magnet and cryocooler is breakdown at cryogenic temperature. In this study, we investigated insulation materials such as Kapton, Aluminum Nitride(AIN), Alumina($Al_2O_3$), glass fiber reinforced plastics(GFRP) and vacuum in cryogenic temperature. Also, we analyzed statistically the Weibull distribution of breakdown voltage.

• Bulletin of the Korean Chemical Society
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• v.30 no.12
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• pp.2895-2898
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• 2009

The complete structural characterization of dehydrodivanillin, an important natural product of interest to the food, cosmetics and aroma industries, has been carried out using multi-dimensional NMR spectroscopic techniques, and its previously $reported^{13}$C-NMR values have been reassigned. Dense and granular thin films of dehydrodivanillin have been grown by sublimation under high vacuum and studied using Scanning Electron Microscopy (SEM), electrical and optical techniques. The transmittance spectra of the films indicate a wide optical band gap of more than 3 eV. Typical J-V characteristics of Glass/ITO/dehydrodivanillin/Al structure exhibited moderate current densities ${\sim}10^{-4}\;A/cm^2$ at voltages > 25 V with an appreciable SCLC mobility of the order of $10^{-6}\;cm^2$/V-s.

• Electrical & Electronic Materials
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• v.5 no.1
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• pp.71-80
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• 1992

CdS박막을 5*$10^{-7}$Torr의 초기 진공하에서 CdS source 온도를 800~1100.deg.C로 하고 기판 온도를 100~200.deg.C로 하여 corning 7059 glass 기판위에 0.6~1.2.mu.m의 두께로 진공증착 방법으로 제조하였다. CdS soruce 온도와 기판온도가 증착된 CdS 박막의 미세구조와 결정구조 및 전기적, 광학적 성질에 미치는 영향을 알아 보았다. 기판을 가열하지 않은 경우는 source 온도가 증가할수록 전기비저항과 광투과도가 낮게 나타났다. Source 온도를 1100.deg.C로 고정하였을 경우 기판의 온도에 따라 전기비저항값과 광투과도값은 증가하였으며 optical band gap도 증가하였다. Soruce 온도가 1100.deg.C이고 기판온도가 190.deg.C일때 전기비저항값은 2*$10^{6}$ohm-cm였고 광투과도는 band gap 이상의 파장에서 80% 이상의 값을 가졌다. 증착된 CdS박막의 결정구조는 모두 hexagonal structure를 가지며 source 온도가 낮을수록 기판온도가 높을수록 C축으로 방향성있게 성장하였다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1997.11a
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• pp.163-166
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• 1997

Electroluminescent(EL) dcvice based on organic thin layers have attracted lots of interests because of thier possible application as large-area light-emitting displays. It was known that MEH-PPV and 1, 1, 4, 4, -Tetraphenyl-1, 3-butadiene(TPB) has red and blue emission peak at 580nm and 480nm, respectively. In this study, MEH-PPV films and TPB films were prepared by spin coating and vacuum deposition method, respectively. Films of MEH-PPV and TPB double layer were also prepared by the same method. Photoluminescent(PL) characteristics of these single and doubler layers were investigated, where a cell structure of glass substrate/ITO/MEH-PPV and/or TPB/Al was employed. It was found that the photoluminescent efficiency of TPB film was higher than that of MEH-PPV film with a single layer and also with a double structure. These films have also different I-V characteristics.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1992.05a
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• pp.114-116
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• 1992

ITO/TiO$_2$/Se solar cell were fabricated by vacuum deposition method, the Se and TiO$_2$were deposited on the ITO/Glass. Prior to the electrical properties of film, the provide Te between the ITO and the Se film were deposited by substrate temperature 20[$^{\circ}C$] and evaporation time 15[min], next time TiO$_2$ were treated by rf-magnetron sputtering in substrate temperature 250[$^{\circ}C$]. Fabricated ITO/TiO$_2$/Se solar cell were as follows : Open Voltage V$\_$oc/=848[mV], Short Circuit Current I$\_$sc/=10.79[mA/$\textrm{cm}^2$]. Fill Factor FF=0.518, energy conversion efficiency η=4.74[%] under the illumination of AM 1.