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    Technology Developers On The Way To Overcome Difficulties Of Micro LED Mass Transfer And Assembly

    Technology Developers On The Way To Overcome Difficulties Of Micro LED Mass Transfer And Assembly

    Source： ledinside.com 04 Jun 2019
    Micro LEDMicro LED mass transfer

    In order to commercialized Micro LED display, the current goal of Micro LED technology developers is to reduce production cost and improve yield through optimizing manufacture process. One obstruction to the goal comes from the production process of mass transferring and bonding, as assembling million Micro LED chips to targeted substrates poses a great challenge for display makers.

     

    Micro LED display is made from Micro LED array consisting of a massive amount of Micro LED chips, forming individual pixels. Since the size of Micro LED chips is less than 100 μm, as small as a piece of pollen, placing chips on substrates in preferred array with accuracy require lots of time and efforts. This is why the production cost of Micro LED display is still very high.

     

    To speed up manufacture process, many technology developers have proposed new techniques including optimizing pick and place technology, developing fluidic assembly technology or applying laser technology to transfer LED chips. LEDinside has analyzed the advantage and disadvantage for different transferring technologies. Pick & place technology can be applied to products greater than 10µm, but transferring efficiency is relatively low as well as its precision and stability. Fluidic assembly technology, which was applied by eLux, PlayNitride and others, can accelerate transfer speed but it does not promise the yield since chips might be damaged during the process. Finally, laser transfer technology, as proposed by Micro LED startups like Uniqarta, will be able to transfer chips smaller than 1µm with better accuracy; it would require higher cost in equipment. 

     

    For securing the leading position in the industry, big names have teamed up with mass transfer technology developers. For example, Apple acquired LuxVue and Osram developed partnership with X-Celeprint. Micro LED startup Rohinni also collaborate with equipment provider K&S to develop mass transferring solution and formed a joint venture with BOE to leverage its placement technology.

     

    Technology Developers On The Way To Overcome Difficulties Of Micro LED Mass Transfer And Assembly

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