The manufacturing process of microLED displays and representative examples of microLED displays (IMAGE)
Caption
Figure. l shows the simplified fabrication process of microLED displays (center part in Fig. 1) and representative applications that have been described above. Deterministic assembly of microLED chips from different growth/donor substrates is required. However, since the feature size of microLED chips is <100 µm, there is a trade-off between tiny feature size and fabrication feasibility. There are three enormous challenges. 1) The extreme transfer efficiency (~tens of millions/h) is vital because of their vast numbers. 2) The extreme placement accuracy (~ 5% of the microLED chip size) is critical for microscale chips. 3) The extreme reliability (~99.9999% ) is also essential. In short, traditional assembly methods are not practical for MicroLEDs, and new integration technologies need to be developed.
Credit
By Furong Chen, Jing Bian, Jinlong Hu, Ningning Sun, Biao Yang, Hong Ling, Haiyang Yu, Kaixin Wang, Mengxin Gai, Yuhang Ma and YongAn Huang
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CC BY