Chinese Journal of Liquid Crystals and Displays, Volume. 35, Issue 12, 1258(2020)

Research of laser bonding for display device

WANG Li-li*, LIU Chao, SONG Yue-sheng, WANG Chu-hang, and SUN Hai-wei
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    With the continuous development of display technology, the comprehensive screen display has become highly sought-after by the market. In order to minimize the display border and improve the screen share of display products, a new technology of laser curing anisotropic conductive film (ACF) is studied to achieve the display bonding. Through the tests of TFT electrode indentation, particle deformation, ACF reaction rate, ACF die shear and product reliabilities, it is found that laser bonding is a viable bonding technology. In this paper, the experiments are designed to verify the advantages of laser bonding technology. Conclusions are as follows: (1)Compared with hotbar bonding technology, the safety distance of thermal is reduced from 0.75 mm to 0.15 mm, which greatly shortens the IC/COF to polarizer(POL) distance and avoids the shrinkage of POL scald. (2)Because of its concentrated laser beam and directly ACF cured, the main bonding time is reduced from 5 s to 3 s, which greatly speeds up the production takt time and improves the efficiency. All results show that laser bonding is a very promising new technology.

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    WANG Li-li, LIU Chao, SONG Yue-sheng, WANG Chu-hang, SUN Hai-wei. Research of laser bonding for display device[J]. Chinese Journal of Liquid Crystals and Displays, 2020, 35(12): 1258

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    Paper Information

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    Received: May. 2, 2020

    Accepted: --

    Published Online: Dec. 28, 2020

    The Author Email: WANG Li-li (wlili@boe.com.cn)

    DOI:10.37188/yjyxs20203512.1258

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