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Seoul Semi Enters the Micro LED Production Process
Seoul Semiconductor has been added to the supply chain for the Samsung NEO QLED TV line. Seoul Semi is promoting its Wicop technology, (Wafer Integrated Chip on PCB) which, unlike flip-chip technology that must be bonded, Wicop allows an unpackaged LED to be surface mounted, reducing size, weight, and power consumption.
Figure 1: Seoul Semiconductor Wicop process
Seoul Semiconductor has been added to the supply chain for the Samsung NEO QLED TV line. Seoul Semi is promoting its Wicop technology, (Wafer Integrated Chip on PCB) which, unlike flip-chip technology that must be bonded, Wicop allows an unpackaged LED to be surface mounted, reducing size, weight, and power consumption.
Figure 1: Seoul Semiconductor Wicop process
Samsung is also working toward changing its MicroLED production process from a single chip transfer system, which moves over 8.3m individual micro-LEDs of each of three colors to a product substrate (24.88m single transfers), to one where the red, green, and blue micro-LEDs are combined in one chip package, reducing the number of transfers to 8.3m instead of 24.9m, which requires that each RGB die is placed correctly on each tri-color die. Samsung is exploring a number of potential solutions that need to be scaled to mass production levels.
As we have reported in the past, the number of transfers and the number of repairs needed, even at high yields, has kept the price of MicroLED TVs in the six figure category. Samsung has also partnered with AUO to supplying glass TFT backplanes on which the MicroLEDs will be deposited. Those backplanes will drive the micro-LEDs using TFT technology similar to what is used to drive LCD and OLED displays currently.
As we have reported in the past, the number of transfers and the number of repairs needed, even at high yields, has kept the price of MicroLED TVs in the six figure category. Samsung has also partnered with AUO to supplying glass TFT backplanes on which the MicroLEDs will be deposited. Those backplanes will drive the micro-LEDs using TFT technology similar to what is used to drive LCD and OLED displays currently.