Design and Assembly of a Thin-Film-Based Micro Pump for a Micro-slot Die
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International Journal of Precision Engineering and Manufacturing https://doi.org/10.1007/s12541-020-00425-6
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Design and Assembly of a Thin‑Film‑Based Micro Pump for a Micro‑slot Die Huseung Lee1 · Dong‑Wook Kwak1 · Jung‑Ho Park2 · Sin Kwon3 · Minyang Yang4 Received: 24 October 2019 / Revised: 8 September 2020 / Accepted: 27 September 2020 © Korean Society for Precision Engineering 2020
Abstract In printed electronics, coating is a key process used not only in the fabrication of solar cell and organic light-emitting diodes but also in display devices. For this purpose, coating devices are designed with several unique characteristics. In particular, slot die coaters and inkjet coaters are advantageous in terms of high-quality morphology and a small dispensing area, respectively. This study proposes a slot die with a narrow-width coating as a fusion device derived from a slot die coater and an inkjet printer. This device is termed a micro-slot die and comprises a micro pump and a narrow-width slot. The device was designed and assembled with appropriate consideration of both dynamic and fluid motions. Consequently, the fabricated device achieves a high-quality coating suitable for application in the display industry. The proposed device is expected to be used in laboratory-scale research applications that require a minimal coating of ink. Keywords Thin-film devices · Piezoelectric devices · Computer-aided engineering · Printed electronics
1 1. Introduction Recently, large-sized display panels have been the focus of attention in applications such as TV and window displays. In conventional manufacturing, lithography [1–4] and vacuum deposition [5–8] are unrivaled techniques for fabricating display panels; however, this low-yield manufacturing of * Huseung Lee [email protected] Dong‑Wook Kwak [email protected] Jung‑Ho Park [email protected] Sin Kwon [email protected] Minyang Yang [email protected] 1
Department of Mechanical and Materials Engineering Education, Chungnam National University, Daejeon, Korea
2
Energy Systems Research Division, Korea Institute of Machinery and Materials, Daejeon, Korea
3
Research Division for Advanced Manufacturing Systems, Korea Institute of Machinery and Materials, Daejeon, Korea
4
Mechanical Engineering Department, The State University of New York, Korea (SUNY Korea), Incheon, Korea
large-sized display panels has limitations on chamber size, while the use of toxic chemicals produces environmental pollution. Printed electronics [9–12] have emerged as an alternative to the conventional manufacturing process as it can produce display panels via a continuous, unlimited process. However, the technique of using printed electronics has not been perfected, because the process is easily affected by the unstable condition of the ambient air and the mechanical positioning errors of device components. Hence, most of the printed electronics processes currently result in a low product yield. Moreover, in both conventional lithography and printed electronics,
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