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Proceedings Paper

High resolution laser patterning of ITO on PET substrate
Author(s): Tao Zhang; Di Liu; Hee K. Park; Dong X. Yu; David J. Hwang
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Paper Abstract

Cost-effective laser patterning of indium tin oxide (ITO) thin film coated on flexible polyethylene terephthalate (PET) film substrate for touch panel was studied. The target scribing width was set to the order of 10 μm in order to examine issues involved with higher feature resolution. Picosecond-pulsed laser and Q-switched nanosecond-pulsed laser at the wavelength of 532nm were applied for the comparison of laser patterning in picosecond and nanosecond regimes. While relatively superior scribing quality was achieved by picosecond laser, 532 nm wavelength showed a limitation due to weaker absorption in ITO film. In order to seek for cost-effective solution for high resolution ITO scribing, nanosecond laser pulses were applied and performance of 532nm and 1064nm wavelengths were compared. 1064nm wavelength shows relatively better scribing quality due to the higher absorption ratio in ITO film, yet at noticeable substrate damage. Through single pulse based scribing experiments, we inspected that reduced pulse overlapping is preferred in order to minimize the substrate damage during line patterning.

Paper Details

Date Published: 29 March 2013
PDF: 7 pages
Proc. SPIE 8607, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XVIII, 860712 (29 March 2013); doi: 10.1117/12.2004122
Show Author Affiliations
Tao Zhang, Stony Brook Univ. (United States)
Advanced Energy Research and Technology Ctr. (United States)
Di Liu, Stony Brook Univ. (United States)
Advanced Energy Research and Technology Ctr. (United States)
Hee K. Park, Yuco Optics Corp. (United States)
Advanced Energy Research and Technology Ctr. (United States)
Dong X. Yu, Yuco Optics Corp. (United States)
Advanced Energy Research and Technology Ctr. (United States)
David J. Hwang, Stony Brook Univ. (United States)
Advanced Energy Research and Technology Ctr. (United States)


Published in SPIE Proceedings Vol. 8607:
Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XVIII
Xianfan Xu; Guido Hennig; Yoshiki Nakata; Stephan W. Roth, Editor(s)

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