Jan 23, 2018: Researchers of the Korea Institute of Machinery and Materials (KIMM) have developed a new technology to to facilitate the mass transfer process of micro LED manufacturing.
The mass transfer process of micro LED is the most challenging method during the production of micro LED. Manufacturers are looking for a simplier efficient process to carry a large amount of micro LED chips and lay them all on a substrate. KIMM, under the Ministry of Science, ICT, and Future Planning, is the the first institution in the world to find a ‘roll transfer process’ that, it claims, would speed up the mass transfer process, and would make commercialization of micro LED easier, reports Business Korea.
The micro LED displays produced by Nano Applied Mechanics Team at KIMM featured a luminous efficacy that is three times higher than that of conventional LED displays. When these displays are powered they needed only 50% of the energy required by a traditional LED display.
This new technology will simplify the mass transfer process of micro LED and speed up the mass display production. Currently, equipment used for manufacturing micro LED can mount a very limited micro LEDs on a substrate per second. The new roll transfer technology would enable about 10,000 chips to be transferred per second.
KIMM has been granted a patent for the roll-to-roll transfer process. They have discovered that instead of directly placing micro LEDs onto the substrate, first a thin film transistor (TFT) can be put on the substrate and then placed micro LEDs can be placed on the TFT element. An active matrix type of micro LED display can then be completed.
According to Market and Market, the micro LED market is expected to grow at a CAGR of 54.7% from US$ 250 million in 2017 to US$ 19.92 billion in 2025. The display sector is expected to account for 98% of the total micro LED market in 2025.