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나노물질의 선택적 레이저 소결을 이용한 유연전기소자의 구현
고승환(Seung Hwan Ko),여준엽(Jun Yeob Yeo),홍석준(Sukjun Hong),한승용(SeungYong Han),이진환(JinHwan Lee),노윤수(YoonSoo Rho),서영덕(Young Duk Seo),전진아(JinA Jeon),남구현(Koo Hyun Nam) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
The development of electric circuit fabrication on heat and chemically sensitive polymer substrates has attracted significant interest as a pathway to low-cost or large-area electronics. Flexible electronics are the electronics on flexible substrates such as a plastic, fabric or paper, so that they can be folded or attached on any curved surfaces. They are currently recognized as one of the most innovating future technologies especially in the area of portable electronics. The conventional vacuum deposition and photolithographic patterning methods are well developed for inorganic microelectronics. However, flexible polymer substrates are generally chemically incompatible with resists, etchants and developers and high temperature processes used in conventional integrated circuit processing. Additionally, conventional processes are time consuming, very expensive and not environmentally friendly. Therefore, there are strong needs for new materials and a novel processing scheme to realize flexible electronics. This paper introduces current research trends for flexible electronics based on (a) nanoparticles, and (b) novel processing schemes: nanomaterial based direct laser patterning methods to remove any conventional vacuum deposition and photolithography processes. Among the several unique nanomaterial characteristics, dramatic melting temperature depression (Tm, 3㎚ particle~150℃) and strong light absorption can be exploited to reduce the processing temperature and to enhance the resolution. This opens a possibility of developing a cost effective, low temperature, high resolution and environmentally friendly approach in the high performance flexible electronics fabrication area.