• Title/Summary/Keyword: Protective Film

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Commercialization & Process Optimization of Protective Film on Nano Silver Transparent Conductive Substrate by Means of Large Scale Roll-to-Roll Coating and Experimental Design (나노실버 투명전도소재 보호필름의 개발 및 공정 최적화와 실험 계획법을 이용한 검증)

  • Park, Kwang-Min;Lee, Ji-Hoon
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.28 no.12
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    • pp.813-820
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    • 2015
  • We have studied commercialization and process optimization of protective film on transparent conductive coated substrate, nano silver on flexible PET (poly ethylene terephthalate), by means of roll-to-roll micro-gravure coater. Nanosilver on flexible PET substrate is potential materials to replace ITO (indium tin oxide). Protective film is most important to maintain unique silver pattern on top of transparent PET. PSA pressure sensitive adhesives) was developed solely for nano silver on PET and protective film was successfully laminated. We have optimized all process conditions such as coating thickness, line speed and aging time & temperature via experimental design. Transparent conductive film and its protective film developed in this research are commercially available at this moment.

Vision Inspection and Correction for DDI Protective Film Attachment

  • Kang, Jin-Su;Kim, Sung-Soo;Lee, Yong-Hwan;Kim, Young-Hyung
    • Journal of Advanced Information Technology and Convergence
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    • v.10 no.2
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    • pp.153-166
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    • 2020
  • DDI(Display Driver IC) are used to drive numerous pixels that make up display. For stable driving of DDI, it is necessary to attach a protective film to shield electromagnetic waves. When the protective film is attached, defects often occur if the film is inclined or the center point is not aligned. In order to minimize such defects, an algorithm for correcting the center point and the inclined angle using camera image information is required. This technology detects the corner coordinates of the protective film by image processing in order to correct the positional defects where the protective film is attached. Corner point coordinates are detected using an algorithm, and center point position finds and correction values are calculated using the detected coordinates. LUT (Lookup Table) is used to quickly find out whether the angle is inclined or not. These algorithms were described by Verilog HDL. The method using the existing software requires a memory to store the entire image after processing one image. Since the method proposed in this paper is a method of scanning by adding a line buffer in one scan, it is possible to scan even if only a part of the image is saved after processing one image. Compared to those written in software language, the execution time is shortened, the speed is very fast, and the error is relatively small.

Measurement and Verification of Thermal Conductivity of Multilayer Thin Dielectric Film via Differential 3$\omega$ Method (차등 3$\omega$ 기법을 이용한 다층 유전체 박막의 열전도도 측정 및 검증)

  • Shin Sang-Woo;Cho Han-Na;Cho Hyung-Hee
    • 정보저장시스템학회:학술대회논문집
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    • 2005.10a
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    • pp.254-259
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    • 2005
  • In this study, measurement of thermal conductivity of multilayer thin dielectric film has been conducted via differential 3$\omega$ method. Also, verification of differential 3$\omega$ method has been accomplished with various proposed criteria. The target film for measurement is 300 nm silicon dioxide and this thin film is covered with various thicknesses of upper protective layer. The upper protective layer is inserted between the target film and the heater line for purpose of electrical insulator or anti-oxidation barrier since the target film may be a good electrical conductor or a well-oxidizing material. However, the verification of differential 3$\omega$ method has not been conducted. Thus we have shown that the measurement of thermal conductivity of thin films with upper protective layer via differential 3$\omega$ method is verified to be reliable as long as the proposed preconditions are satisfied. Experimental results show that the experimental errors tend to increase with aspect ratio between upper protective layer thickness and width of the heater line due to heat spreading effect.

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Measurement and Verification of Thermal Conductivity of Multilayer Thin Dielectric Film via Differential $3\omega$ Method (차등 $3\omega$ 기법을 이용한 다층 유전체 박막의 열전도도 측정 및 검증)

  • Shin, Sang-Woo;Cho, Han-Na;Cho, Hyung-Hee
    • Transactions of the Society of Information Storage Systems
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    • v.2 no.1
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    • pp.85-90
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    • 2006
  • In this study, measurement of thermal conductivity of multilayer thin dielectric film has been conducted via differential $3\omega$ method. Also, verification of differential $3\omega$ method has been accomplished with various proposed criteria. The target film for the measurement is 300 nm thick silicon dioxide which is covered with upper protective layer of various thicknesses. The upper protective layer is inserted between the target film and the heater line for purpose of electrical insulator or anti-oxidation barrier since the target film may be a good electrical conductor or a well-oxidizing material. Since the verification of differential $3\omega$ method has not been conducted yet, we have shown that the measurement of thermal conductivity of thin films with upper protective layer via differential $3\omega$ method is verified to be reliable as long as the proposed preconditions of the samples are satisfied. Experimental results show that the experimental errors tend to increase with aspect ratio between thickness of the upper protective layer and width of the heater line due to heat spreading effect.

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Film Formation in $CO_2$ Corrosion with the Presence of Acetic: An Initial Study

  • Ismail, Mokhtar Che;Mohd, Muhammad Azmi;Turgoose, Stephen
    • Corrosion Science and Technology
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    • v.7 no.1
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    • pp.22-26
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    • 2008
  • Formation of protective iron carbonate films in $CO_2$ corrosion can reduce corrosion rate substantially and the effects have been incorporated in various prediction models. The $CO_2$ corrosion with the presence of free acetic acid is known to increase corrosion rate below scaling temperature. The possible interaction between the formation of iron acetate and iron carbonate films can affect the protectiveness of the film. The study is done using 3% NaCl solution under stagnant $CO_2$ -saturated condition at the scaling temperatures at various pH values and HAC concentrations. The result show that the presence of HAc does not affect the formation of protective iron carbonate film but delays the attainment of protective iron carbonate due to a possibility of solubilising of ferrous ions and thinning of the films.

A study on real time inspection of OLED protective film using edge detecting algorithm (Edge Detecting Algorithm을 이용한 OLED 보호 필름의 Real Time Inspection에 대한 연구)

  • Han, Joo-Seok;Han, Bong-Seok;Han, Yu-Jin;Choi, Doo-Sun;Kim, Tae-Min;Ko, Kang-Ho;Park, Jung-Rae;Lim, Dong-Wook
    • Design & Manufacturing
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    • v.14 no.2
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    • pp.14-20
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    • 2020
  • In OLED panel production process, it is necessary to cut a part of protective film as a preprocess for lighting inspection. The current method is to recognize only the fiducial mark of the cut-out panel. Bare Glass Cutting does not compensate for machining cumulative tolerances. Even though process defects still occur, it is necessary to develop technology to solve this problem because only the Align Mark of the panel that has already been cut is used as the reference point for alignment. There is a lot of defective lighting during panel lighting test because the correct protective film is not cut on the panel power and signal application pad position. In laser cutting process to remove the polarizing film / protective film / TSP film of OLED panel, laser processing is not performed immediately after the panel alignment based on the alignment mark only. Therefore, in this paper, we performed real time inspection which minimizes the mechanism tolerance by correcting the laser cutting path of the protective film in real time using Machine Vision. We have studied calibration algorithm of Vision Software coordinate system and real image coordinate system to minimize inspection resolution and position detection error and edge detection algorithm to accurately measure edge of panel.

Protective Effects of Ecklonia cava Film on UV-B-induced Photodamages (감태(Ecklonia cava)를 이용한 자외선 차단 필름의 UV-B 조사에 의한 광손상으로부터 보호효과)

  • Lee, Hyo Geun;Won, Yu Sun;Koh, Eun Byeol;Kim, Yoon Ah;Kim, Jeong Eun;Kim, Yoon Jeong;Han, Chae Won;Choi, Min-Woo;Kim, Jae-Il;Jeon, You-Jin
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.50 no.6
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    • pp.714-720
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    • 2017
  • Exposure to ultraviolet (UV) radiation is associated with the development of adverse effects in skin. Among the three types of UV rays, UV-B causes the most damaging effects, inducing sunburn and penetrating the outer skin, resulting in DNA mutations and skin cancer. The objective of this study was to formulate a UV-protective film by incorporating Ecklonia cava extracts. Cells covered with the film were exposed to UV-B (50, 80, and $100mJ/cm^2$). To determine the protective effects of the film, we evaluated cell viability, intracellular ROS generation, and apoptosis. We found that all E. cava extracts absorbed UV light and exhibited protective effects against UV-B-induced photodamage. Among the protective films examined in this study, that incorporating an E. cava 70% ethanol extract (70EX) formed the most effective protection against UV-B in HaCaT cells. These findings suggest that the application of film containing E. cava extract could prevent UV-B-induced photodamage, and offer protection against the detrimental effects of UV radiation, thus maintaining physiological condition.

Enhancement of cover-layer surface properties using dielectric protective layer (유전체 보호층을 이용한 NFR 미디어 커버층의 표면 특성 향상)

  • Kim, Jin-Hong;Lim, Jung-Shik;Lee, Jun-Seok;Seo, Jeong-Kyo
    • Transactions of the Society of Information Storage Systems
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    • v.4 no.1
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    • pp.13-18
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    • 2008
  • Scratches are observed on a polymer cover-layer of near-field recording (NFR) media after a servo test with rotating disc. The scratches are formed by the collision of a solid immersion lens (SIL)-media. One of the possible ways to avoid the scratch problem is to coat a dielectric protective film on the polymer cover-layer which enhances the hardness of the surface. The surface with hard characteristics in the surface reduces the scratch problem in the cover-layer. Not only the mechanical properties but also the optical properties should be controlled. Specifically, the refractive index of the dielectric protective film should be matched with the polymer cover-layer not to lose light at the interface due to the difference of the refractive index. The refractive index of the dielectric film can be tailored by controlling process parameters during sputtering and matched with that of the polymer cover-layer.

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An Experimental Study on the Fire Risk Assessment & Calculation Breakthrough Time through Permeation Test of Chemical Protective Clothing (화학보호복의 화재위험성 및 화학적 투과시험을 통한 파과시간산정에 관한 실험적 연구)

  • Ko, Jae-Sun;Park, Pyoung-Kyu
    • Fire Science and Engineering
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    • v.24 no.2
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    • pp.21-30
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    • 2010
  • We have test chemical resistance and flame retardant properties of chemical protective clothing Fabrics by the ASTM and ISO standard methods. The flame retardant test results show that polyethylene is poor in flame resistance but fluoroelastomer add to decabrom is excellent in flame resistance. Especially, nowadays heat protective clothing for firefighters, which is aluminized film layers laminated to aramid fabric, show the excellent flame resistance. However, the chemical resistance test results show that aluminium is high corrosive in 4M NaOH solution alone. The problem of corrosion can be overcome by employing multiple barrier film. Also, based on the result of flame retardant test, duel skin of polymer barrier film add to aluminum film and single skin of fluorinated rubber with flame retardant materials seems to be fit for the chemical protective clothing. Also the thermal protection and heat transfer test results show that TPP and HTI is increased assured that the continued study on fire risk assessment & chemical resistance of chemical protective clothing fabrics will contribute to the upgrade the performances of chemical protective clothing fabrics.

Oxidation Resistance and Preferred Orientation of TiAIN Thin Films (TiAIN 박막의 우선방위와 내산화성)

  • Park, Yong-Gwon;Park, Yong-Gwon;Wey, Myeong-Yong
    • Korean Journal of Materials Research
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    • v.12 no.8
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    • pp.676-681
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    • 2002
  • Microstructure, mechanical properties, and oxidation resistance of TiAIN thin films deposited on quenched and tempered STD61 tool steel by arc ion plating were studied using XRD, XPS and micro-balance. The TiAIN film was grown with the (200) orientation. The grain size of TiAIN thin film decreased with increasing Al contents, while chemical binding energy increased with Al contents. When hard coating films were oxidized at $850^{\circ}C$ in air, oxidation resistance of both TiN and TiCN films became relatively lower since the surface of films formed non-protective film such as $TiO_2$. However, oxidation resistance of TiAIN film was excellent because its surface formed protective layer such as $_A12$$O_3$ and $_Al2$$Ti_{7}$$O_{15}$, which suppressed oxygen intrusion.