• Title/Summary/Keyword: 롤투롤 공정

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Cantilever Type Idler Roller in Roll-to-roll Process for Printed Electronics (인쇄전자용 롤투롤 공정의 외팔보 형식 아이들 롤러)

  • Yoon, Deok-Kyun;Lee, Seung-Hyun;Kang, Jeong-Sik;Cho, Byung-Oh
    • Journal of the Korean Society for Precision Engineering
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    • v.28 no.10
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    • pp.1153-1158
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    • 2011

  • Roll-to-roll process is an emerging mass production method for printed and flexible electronics such as touch screen panel, RFID tag, thin film solar cell, and flexible display due to its high throughput. High precision in printing and coating is required to apply functional materials onto substrate. For such reason, every part of the roll-to-roll equipment needs to be precisely fabricated and to retain its precision under regular operation. In this article, the precision of cantilever type idler roller and a novel method to mitigate its deflection under web tension loading are discussed and the method is verified using both the numerical and the experimental works. The proposed method improves the structural rigidity of cantilever type roller whose advantages, such as low capital cost and high web path configurability, are maintained.

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Fabrication of nano-pattern of moth-eye structure by ion beam surface treatment (이온빔 표면처리를 통한 나방눈 구조의 나노패턴 형성 연구)

  • Byeon, Eun-Yeon;Lee, Seung-Hun;Kim, Do-Geun
    • Proceedings of the Korean Institute of Surface Engineering Conference
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    • 2018.06a
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    • pp.89-89
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    • 2018

  • 스마트 폰이나 내비게이션, 태블릿 PC, TV 등 디스플레이 소자가 휴대 가능해지고 고급화되면서 빛 반사로 인한 눈부심, 시인성 저하 등에 대한 문제가 제기되고 있다. 디스플레이의 반사방지를 위해 방현성(anti-glare) 및 반사방지(anti-reflection) 특성의 코팅이나 기능성 필름에 대한 연구 개발이 이루어지고 있다. 특히 반사방지 기능 부여를 위해 나방눈(moth-eye) 구조를 모방하여 표면 나노 구조 형상화에 대한 연구가 활발히 진행되고 있지만, 나노 임프린팅 및 리소그라피 공정을 통한 패턴 공정은 마스크나 몰드를 필요하고 대면적 제작에 어려움이 있다. 본 연구에서는 폭 300 mm급 롤투롤 이온빔 표면처리를 통해 나노 구조 몰드 필름을 제작하였고, 이형용 수지를 이용한 표면 구조 전사를 통해 모스 아이 구조와 같은 나노 구조 패턴이 전사되는 것을 확인하였다. 나노 구조가 전사된 필름에 대한 투과도 관찰 결과, 전체 투과도 91% 이상으로 투과도가 약 3% 향상되고 반사도는 저하되는 결과를 확인하였다. 롤투롤 장비를 이용하여 대면적 필름 제작이 가능한 것을 확인하였고, 나노패턴의 구조 형성 및 반사방지 기능에 대한 신뢰성 검토를 통해서 양산화 가능할 것이라 전망된다.

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Design and Fabrication of Doctor Blade Type Dispensers for Uniform Resin Coating during Roll to Roll Imprinting Process (롤투롤 임프린트 공정 중 균일한 레진 코팅을 위한 닥터블레이드형 디스펜서 설계 및 제작)

  • Son, Hee Chul;Kim, Seong Woo;Lee, Jihoon;Park, Cheol Woo;Kwak, Moon Kyu
    • Journal of the Korean Society for Precision Engineering
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    • v.32 no.10
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    • pp.897-902
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    • 2015

  • This study reports on a uniform resin coating method by using a doctor blade type dispenser. For high productivity, continuous imprint-lithography has been studied, and developed fabrication systems are used in several applications such as anti-reflection films, dry adhesives, and water collecting surfaces. In the continuous fabrication field, researchers have typically focused on patterning and demolding procedures. During the roll-to-roll fabrication process, however, the uniform resin coating process is also important in order to obtain a high quality product, which can be evaluated by uniform thickness, precise geometric expressions, and a thin residual layer. To achieve these, a doctor blade type dispenser was designed and fabricated. As a result, thickness of coated resin was well controlled by modulating the flow rate of the resin and blading gap. In addition, a very thin layer coating process (${\sim}10{\mu}m$) was achieved by softly contacting the blade on the substrate.

  • https://doi.org/10.7736/KSPE.2015.32.10.897 인용 PDF KSCI