Selective Transfer of Light-Emitting Diodes onto a Flexible Substrate via Laser Lissajous Scanning

As the light-emitting diode (LED) size gradually decreases, it is difficult to conventionally transfer an LED onto a donor substrate. In this paper, we propose a print transfer method that selectively transfers an LED onto a UV release tape, i.e., the donor substrate, via focused laser scanning with...

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Published inACS omega Vol. 5; no. 43; pp. 27749 - 27755
Main Authors Jung, Daekyeong, Lee, Taeksu, Lee, Jaejong, Kim, Jaegu, Kim, Jaehyun, Lim, Hyungjun
Format Journal Article
LanguageEnglish
Published American Chemical Society 03.11.2020
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Summary:As the light-emitting diode (LED) size gradually decreases, it is difficult to conventionally transfer an LED onto a donor substrate. In this paper, we propose a print transfer method that selectively transfers an LED onto a UV release tape, i.e., the donor substrate, via focused laser scanning with Lissajous patterns. We implemented an optical system based on focused laser scanning to perform selective transfer; this can adjust the scanning area immediately without changing the donor substrate size according to the LED size. Because the commercialized UV release tape is utilized as a donor substrate, the adhesion between the LED and donor substrate can be constantly maintained even after repeated experiments. In this study, several LEDs were transferred to a flexible printed circuit boardarranged in a circular and square shape to demonstrate a high degree of freedom of the systemand turned on.
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ISSN:2470-1343
2470-1343
DOI:10.1021/acsomega.0c01425