• 한국표면공학회지
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• 제41권1호
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• pp.1-5
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• 2008

In this work, improvement of mechanical and electrical properties of gate dielectric layer for flexible organic thin film transistor (OTFT) devices was investigated. In order to increase the mechanical flexibility of PVP (poly(4-vinyl phenol) organic gate dielectric, a very thin inorganic $HfO_2$ layers with the thickness of $5{\sim}20nm$ was inserted in between the spin-coated PVP layers. Insertion of the inorganic $HfO_2$ in the laminated organic/inorganic structure of PVP/$HfO_2$/PVP layer led to a dramatic reduction in the leakage current compared to the pure PVP layer. Under repetitive cyclic bending, the leakage current density of the laminated PVP/$HfO_2$/PVP layer with the thickness of 20-nm $HfO_2$ layer was not changed, while that of the single PVP layer was increased significantly. Mechanical flexibility tests of the OTFT devices by cyclic bending with 5 mm bending radius indicated that the leakage current of the laminated PVP/$HfO_2$(20 nm)/PVP gate dielectric in the device structure was also much smaller than that of the single PVP layer.

• 월간포장계
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• 통권112호
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• pp.118-125
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• 2002

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2013년도 춘계학술대회 논문집
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• pp.957-958
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• 2013

• 한국자동차공학회논문집
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• 제25권3호
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• pp.374-379
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• 2017

In vehicle to pedestrian accidents, cracks occur in the vehicle laminated glass due to impact of a pedestrian's head. In this study, FMH(Free Motion Headform) was used to experiment on and analyze the crack patterns on a vehicle laminated glass that collides with an adult headform at speeds of 20 km/h, 30 km/h, and 40 km/h, respectively. Applying the acquired experimental data and material property of the vehicle laminated glass to the structural analysis program LS-Dyna, we could develop the FE model of vehicle laminated glass similar to real vehicle laminated glass. We could estimate the head impact velocity and pedestrian's vehicle impact velocity using the Madymo program.

• 한국식품저장유통학회지
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• 제5권4호
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• pp.331-334
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• 1998

기능성 MA필름을 생산하여 이를 골판지 상자의 내부에 첨합시킨 FC상자의 활용가능성을 조사하고자 골판지 상자와 기능성 MA필름대를 골판지 상자 내부에 첨합시킨 FC포장구와 LDPE 및 기능성필름과 대조구로 골판지 상자만으로 포도를 포장하여 25 C에 저장하여 품질변화를 조사한 결과, FC 상자와 LDPE와 CE포장구는 대조구 보다는 중량감소율이 현저히 낮았으며 비타민C의 함량도 33% 높게 유지되고 있었다. 산도와 환원당 함량은 포장구들간에는 큰차이가 없었다. 외관 및 부패를 조사한 결과 대조구에 비해 개발포장구에서 품질이 더 높게 유지되고 있어 FC 포장재를 포도 포장용 상자로 활용가능성이 확인되었다.

• 한국태양에너지학회 논문집
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• 제30권4호
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• pp.29-35
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• 2010

This study has been carried out empirical research on Transparent Thin-film BIPV modules, BIPV modules installed on the exterior of the building are applied a laminated module 1kWp, double-glazing module 3kWp and triple-glazing module 1kWp. Applied to the total capacity of BIPV modules are 5kWp. In this study, design and construction process of BIPV systems is presented. In addition, through monitoring of the BIPV system, the temperature and the power characteristics of each module were analyzed. During the measurement period, the module temperature measurement results, the maximum surface temperature of $51.5^{\circ}C$ triple-glazing BIPV module showed the highest, followed by double-glazing BIPV module $49.1^{\circ}C$, $44.7^{\circ}C$ laminated modules, respectively. Power output results, the daily average double-layer modules showed 4.10kWh/day, triple-glazing module 1.57kWh, respectively 1.81kWh laminated modules. In particular, the power efficiency of triple-glazing BIPV module was lower than the power efficiency of the laminated BIPV module. This phenomenon is considered to be affected by the module temperature. In the future, BIPV modules in this study the relationship between module temperature and power characteristics plans to identify.

• 반도체디스플레이기술학회지
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• 제20권3호
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• pp.22-26
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• 2021

Thin-film encapsulation (TFE) technology is most effective in preventing water vapor and oxygen permeation in the organic light emitting diodes (OLED). Of those, a laminated structure of Al₂O₃ and MgO were applied to provide efficient barrier performance for increasing the stability of devices in air. Atomic layer deposition (ALD) method is known as the most promising technology for making the laminated Al₂O₃/MgO and is used to realize a thin film encapsulation technology in organic light-emitting diodes. Atomic layer deposited inorganic films have superior barrier performance and have advantages of excellent uniformity over large scales at relatively low deposition temperatures. In this study, the control system of the MgCP₂ precursor for the atomic layer deposition of MgO was established in order to deposit the MgO layer stably by the injection time of second level and the stable heating temperature. The deposition rate was obtained stably to be from 4 to 10 Å/cycle using the injection pulse times ranging from 3 to 12 sec and a substrate temperature ranging from 80 to 150 ℃.

• 한국식품과학회지
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• 제44권6호
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• pp.711-715
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• 2012

생고분자를 이용한 포장 소재에 관한 연구는 많이 이루어지고 있으나 그 것의 상업적 식품 적용은 순수 생고분자의 비용과 생고분자 소재의 불충분한 물리적 성질에 의해 많은 제한을 받고 있다. 본 연구에서는 식품 가공 부산물인 DMM과 WPI를 이용하여 가식성 적층필름을 개발하였다. WPI 필름과의 적층을 통해 DMM 필름의 신장성과 열접합강도를 높일 수 있었고, 이로써 적층기술이 DMM 필름의 식품 포장에서의 적용 가능성을 높이는 방법으로 제시될 수 있었다. DMM 외 다른 식품 가공 부산물을 기초로 한 생고분자 필름들 개발에 있어서도 그들의 식품 적용성 향상의 방법으로 적층방법을 제안할 수 있으리라 사료된다.

• 한국의류산업학회지
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• 제14권4호
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• pp.641-647
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• 2012

This study investigates the sound properties of fabric frictional sound (SPL, ${\Delta}L$, ${\Delta}f$) according to the film type of PTFE laminated vapor-permeable water-repellent fabrics in order to understand the relationship between SPL and the basic properties of fabrics such as layer, yarn type, and thickness of fiber. This study accesses their mechanical properties and determines how to control them to minimize SPL. Eight PTFE laminated water-repellent fabrics, composed of four different film types (A, B, C, D) and with two different fabrics, were used as test specimens. Frictional sounds generated at 1.21m/s were recorded by using a fabric sound generator and SPLs were analyzed through Fast Fourier Transformation (FFT). The mechanical properties of fabrics were measured by KES-FB. The SPL value was lowest at 74.4dB in film type A and highest as 85.5dB in type D. Based on ANOVA and post-hoc test, specimens were classified into less Loud Group (A, B) and Loud Group (C, D). It was shown that SPL was lower when 2 layer (instead of 3 layer), filament yarn than staple, and thin fiber than thick were used. In Group I, shearing properties (G, 2HG5), geometrical roughness (SMD), compressional properties (LC, RC) and weight (W) showed high correlation with SPL however, elongation (EM) and shear stiffness (G) did with SPL in Group II.

• 한국식품저장유통학회지
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• 제5권4호
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• pp.335-338
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• 1998

골판지상자에 기능성 필름을 첨합한 포장상자(FC)의 배 저장 중 품질유지 상태를 조사하고자 대조구로 기존에 유통중인 골판지 상자와 0.02, 0.04mm의 LDPE필름과, 0.02와 0.04mm의 기능성MA필름(CE)에 배를 포장하여 5 C에 60일간 저장하면서 신선도 변화를 비교 고찰하였다. 중량변화는 대조구는 2.9% 감소했으며, FC, LDPE와 CE 포장구들은 1.0-0.5% 감소했다. 경도는 각 포장방법간에 차이가 없었으며 비타민C 함량도 필름포장구들과 FC 포장구에서 대조구보다 더 높게 유지되고 있었다. 산도와 당도는 대조구가 필름포장구들과 FC 포장구 보다 변화가 심하게 나타났고 전체적인 외관상의 기호도 FC 포장구와 필름포장구에서 양호한 것으로 나타났다. 이상의 결과에서 FC 포장재를 신선도 유지에 활용할 수 있을 것으로 판단되었다.