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Recent Advances in Transfer and Bonding of Micro-LEDs for Micro-LED Display Fabrication
Jungho Shin, Jiho Joo
J Electr Electron Mater 2025;38(6):604-616.   Published online November 1, 2025
DOI: https://doi.org/10.4313/JEEM.2025.38.6.2
Micro-LEDs, which have a chip size of less than 100 × 100 μm², have been potential candidates for conventional LCDs and OLEDs due to their high optical power, outstanding stability, and nanosecond response time. However, Micro-LED chips are fabricated only on limited substrates due to the high-temperature metal-organic chemical vapor deposition process and lattice-mismatch issues. Therefore, the fabrication of Micro-LED displays requires complex processes such as chip fabrication, transfer, bonding, and repair. Especially, Micro-LED transfer and bonding have been critical challenges for the Micro-LED display commercialization. Here, recent advances in the transfer and bonding of Micro-LEDs are introduced, and novel Micro- LED display fabrication methods are reviewed to provide a practical outlook for both mass production and commercialization of Micro-LED displays.
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