With a deep understanding of each technology, it is possible to understand where we are and where we can go. The corresponding technologies vary from each other. The targeted applications cover from micro-displays such as AR/VR/MR, to consumer middle-sized displays like smart phones, TVs, to huge displays, e.g., large video public displays. It also shows what important players have offered to the market, and the technologies behind the prototypes/products. This report provides all the major technology choices with detailed introduction, analysis, and comparison. Therefore, an increasing number of people put more effort also on technologies such as inspection, repair, driving, image improvement, light management, and high-volume production equipment. Recently, more and more players realize a complete understanding of all the processes is the key. For instance, several years ago, the major efforts were concentrated in die miniaturization, chip design and mass transfer. After years of development, some technology difficulties have been solved, while new challenges are placed in front of us. To fabricate a Micro-LED display, many technologies and processes are involved, such as epitaxy, photolithography, chip fabrication, substrate removal, inspection, mass transfer, bonding and interconnection, testing, repair, backplane, and drive IC, etc.
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