Lai SQ, Liu SB, Li ZL, Zhang ZN, Chen Z et al. Applications of lasers: A promising route toward low-cost fabrication of high-efficiency full-color micro-LED displays. Opto-Electron Sci 2, 230028 (2023). doi: 10.29026/oes.2023.230028
Citation: Lai SQ, Liu SB, Li ZL, Zhang ZN, Chen Z et al. Applications of lasers: A promising route toward low-cost fabrication of high-efficiency full-color micro-LED displays. Opto-Electron Sci 2, 230028 (2023). doi: 10.29026/oes.2023.230028

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Applications of lasers: A promising route toward low-cost fabrication of high-efficiency full-color micro-LED displays

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  • Micro-light-emitting diodes (micro-LEDs) with outstanding performance are promising candidates for next-generation displays. To achieve the application of high-resolution displays such as meta-displays, virtual reality, and wearable electronics, the size of LEDs must be reduced to the micro-scale. Thus, traditional technology cannot meet the demand during the processing of micro-LEDs. Recently, lasers with short-duration pulses have attracted attention because of their unique advantages during micro-LED processing such as noncontact processing, adjustable energy and speed of the laser beam, no cutting force acting on the devices, high efficiency, and low cost. Herein, we review the techniques and principles of laser-based technologies for micro-LED displays, including chip dicing, geometry shaping, annealing, laser-assisted bonding, laser lift-off, defect detection, laser repair, mass transfer, and optimization of quantum dot color conversion films. Moreover, the future prospects and challenges of laser-based techniques for micro-LED displays are discussed.
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