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| Viewpoint | ||
January 5, 2023
VIEWPOINT 2023: Uwe Wagner, CEO, 3D-Micromac
MicroLEDs have the potential to revolutionize the display industry, promising a variety of advantages such as superior viewing angle, high dynamic range with perfect black luminance and high brightness, wide color gamut, fast refresh rates, long lifetime, and low power consumption. However, the microLED fabrication process is vastly more complex than LCD and OLED manufacturing, and faces several technical challenges that must be overcome before microLEDs can be readily available in the mass market. Among these is detaching and transferring processed microLED chips from the sapphire growth or donor substrate to an intermediate substrate for subsequent testing without damaging the expensive growth substrate, allowing it to be repurposed for future use. Another challenge is precisely transferring the microLED chips from the carrier substrate after testing to the final display substrate. In both cases, high accuracy, reliability, and speed, as well as low detachment force, are essential ingredients to a successful transfer process for microLED fabrication. Another important issue is the pixel yield of the display. A dead pixel can occur at various stages of manufacturing, such as epitaxy, LED chip processing or the transfer process. To produce a full-colour, full-HD (1920×1080) display with less than five dead pixels, the yield must be 99.9999 percent, which is too high for the technical level achievable today with conventional manufacturing methods. The good news is that major progress has been made across many fronts in microLED manufacturing, particularly in mass transfer, thanks to advances in laser micromachining. As the industry leader in laser micromachining, 3D-Micromac is working closely with our customers and partners to develop process solutions that speed the commercialization of microLEDs and other optical devices and components fueling the next generation of display products. Uwe Wagner, CEO 3D-Micromac http://www.3d-micromac.com |
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