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dewetting을 이용한 고해상도 비평면 인쇄 기술 기발
곽문규(Moon Kyu Kwak),신규호(Kyu Ho Shin),윤응률(Eung Yeoul Yoon),박민철(Min Cheol Park),권건우(Keon Woo Kwon),서갑양(Kahp Y. Suh) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
We present here a simple dewetting-assisted flexographic printing method for potential applications to roll-to-roll or plate-to-roll pattern transfer. By controlling dewetting of a thin, conductive ink material with a patterned rubbery mold such as polydimethyl siloxane (PDMS). the liquid ink layer is broken and then selectively wets the protruding part of mold with good pattern uniformity. Subsequently, a resist (e.g., SU-8)-coated aluminum cylinder is brought in contact with the selectively ink-coated PDMS mold, resulting in a pattern transfer to the target substrate without collapse or merging of neighboring features. Using this method. conductive metal lines of silver ink are fabricated on a 300 ㎜-cylindrical surface with the resolution of~20 ㎛ and the sheet resistance less than~4.3 _ after 10 repeated transfer cycles.