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"희생층"

Article
Micro-Patterning of Liquid Metal on Flexible Substrate Using Laser Induced-Forward Transfer
Minje Jo, Seok Young Ji, Jungho Cho, Won Seok Chang
J. Korean Soc. Precis. Eng. 2023;40(2):157-162.
Published online February 1, 2023
DOI: https://doi.org/10.7736/JKSPE.022.097
We have developed a direct conductive patterning method with micro-scale line widths using the laser-induced-forward transfer (LIFT) and liquid metal. As this method does not need post-thermal processing, there is no thermal damage even on heat-sensitive polymer substrates by low-power laser irradiation on the dynamic release layer (DRL). Unlike other liquid metal patterning processes, this procedure can easily achieve fine line widths of a few tens of micrometers corresponding to laser spot size. The solid-state UV pulse laser with 266 nm wavelength and 20 ns pulse duration was used to transfer Eutectic Gallium Indium (EGaIn) liquid metal and the results for the single and multi-pulse laser irradiation were investigated to determine the effective process conditions. The applicability of flexible circuit fabrication and selective circuit repair was successfully tested on Polyimide (PI) substrate. After the LIFT process, the electrical properties of liquid metal on the pattern were measured to be approximately 5~8 x 10-3 Ω/m of resistance.

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  • Study on Micro Grooving of Tungsten Carbide Using Disk Tool
    Min Ki Kim, Chan Young Yang, Dae Bo Sim, Ji Hyo Lee, Bo Hyun Kim
    Journal of the Korean Society for Precision Engineering.2024; 41(2): 123.     CrossRef
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