【Interview】PlayNitride Achieves 100% Yield for Micro LED Mass Transferring

Featuring high definition, saturation and reliability, Micro LED as the next-gen display technology continues to progress. Leading brands such as Samsung and Sony have released large size Micro LED TV products and the rumors of Apple to reveal Micro LED based wearable products like Apple Watch or AR smart glasses never stopped.

PlayNitride, the Micro LED technology provider based in Taiwan, is one of the key players of the supply chain. It has teamed up with leading display makers to present Micro LED innovation in CES and SID in the past few years. Recently, PlayNitride and panel manufacturer AUO jointly released their latest Micro LED development, a 9.4-inch high resolution flexible Micro LED display, achieving a new technological breakthrough.

LEDinside interviewed Falcon Liu, Marketing Director of PlayNitride, to learn more about the company’s proprietary technology and if the on-going COVID-19 crisis brings impacts on the development of Micro LED technology and applications.

Mass Transferring, Testing and Repairing Reach Mass Production Level with 100% Yield

Micro LED technology has been blocked at the R&D phase for a while due to the technical difficulties of mass transferring, testing and repairing. It is extremely challenge to transfer a massive amount of micronized LED chips onto driven backplane as well as testing and repairing these ultra-small size chips. With its technology breakthrough, PlayNitride successfully transferred 5.5 million Micro LEDs sized 15*30 μm on to PI-based driven backplane.

Liu indicated that PlayNitride has apply its mass transfer technology to glass backplane before and the same technology can also be used for PI backplane transferring. However, the manufacture process is more challenging for PI backplane as it has to be removed from a substrate after transferring. For the process, PlayNitride adopted the technique used for OLED flexible display to achieve.

“This new flexible display was made by existed manufacture process. From glass backplane to the PI-based LTPS TFT driven backplane, PlayNitride has achieved a new milestone,” commented Liu. He addressed that PlayNitride has developed technology solutions for mass transferring, mass inspection and mass repairing, achieving a yield of 100%.

Despite that the technology of transferring is ready, the whole Micro LED display module still need driver and interface integration, which still rely on the technology provide by display makers. Thus, PlayNitride said the mass production of final Micro LED products will still take 1 or 2 years depending on the schedule of its clients.

No COVID-19 Impacts on Its Current Micro LED Development and Delivery Plans

Based in Taiwan where the COVID-19 is more contained in comparison to other countries, PlayNitride has not been affected by the coronavirus pandemic. Liu indicated that currently there is no impact on its business operation and its plan for Micro LED development and production shipment goes with schedule.

To meet the rising demands of clients, PlayNitride has raised found and expanded production capacity since last year. The company raised US$ 86 million and purchased several MOCVD systems and thin film equipment from European suppliers. These new facilities were installed and are ready for mass production.

As for the progress of new technology development, Liu said PlayNitride would demonstrate more Micro LED innovation at SID Display Week if it was to take place in June as planned. Since the event is now rescheduled to August and PlayNitride will not join, the company might present its new technologies at Touch Taiwan or other platform later this year.

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