In the next generation display technology Micro LED development process, cross-border integration is always the key. All over the world, chipmakers, panel manufacturers, process technology providers, system suppliers and so on, all of them have established cooperative relationships, play to each other's technical strengths, accelerate the progress of Micro LED technology. From the upstream chip manufacturing start, the various stages of the process and technology linked together, it is the equipment plant. If the chip and panel makers are the actors who put the Micro LED technology on the commercial stage, the equipment factory is the backfield quietly integrating resources, supporting the bright front desk behind the staff, the reputation is not necessarily particularly loud, but the function is crucial. At this year's annual LEDforum in Ledinside, several device makers were invited to share their key technologies, offering different solutions for transfer, jointing, testing and repair.

In an interview with Asm Pacific Technology, which specializes in semiconductor post-process equipment, the Sales Director, Mr. Koo chi-ho, explained how the related process equipment supports the transfer and solidification technology to accelerate the commercialization of Micro leds.

ASM Pacific Sales Director Mr. C H Koo details the technology and solutions for Mini/Micro leds. ASM Pacific emphasizes speed and yield, providing solutions for Micro LED and Mini LED display technology "the biggest challenge in Micro LED production technology is still the number of chips. "talking about the technological progress of Micro leds, Koo highlighted the key points. He points out that while traditional leds used to require only 50-500 units of chips for a display screen, Micro LED displays now require twenty-four million. Therefore, the speed of the transfer technology is absolutely indispensable. In order to achieve the following process yield requirements, to ensure that the accuracy of the chip transfer is also very important. As an equipment manufacturer, Asm Pacific is able to meet the needs of its customers by providing transfer equipment with both speed and accuracy to help them optimize process efficiency and reduce production costs and speed up production schedules. ASM Pacific has a complete product line, can break a Micro LED, Mini LED backlight and Mini LED RGB module and other technical process problems. For the Mini LED backlight technology, which is already on the market, Koo said it is the easiest technology to cut into. Traditional solid crystal technology can also be achieved, but ASM Pacific's strength lies in providing a high-speed solution, its AD 420 automation system has been used in the current Mini LED backlight production process. Mini LED RGB display module process, in addition to maintaining speed, but also need to enhance the smoothness of the chip arrangement to maintain the consistency of color display. In the process of rewelding, the position, angle and flatness of the chip are difficult to control, which is difficult to be solved by traditional technology. Asm Pacific is fully aware of the requirements of Mini RGB LED and Micro LED display module products, and has developed a huge amount of welding process AD300Pro. Its exclusive technology allows the LED chip not to be reflow, which ensures that the chip's XY position and horizontal angle are consistent, make full-color RGB display screen smoothness easier to control. As for the Micro LED technology, Asm Pacific has agreed to transfer 10,000 Micro LED chips at a time, the joint efficiency of up to 80,000 pieces per time. In addition, the ASM Pacific patented welding head, can maintain high consistency in welding performance at high temperatures, reaching accuracy within 2 meters at 350 degrees Celsius, and up to 1 meters at room temperature, the Patented Air Chamber of the machine is joined to provide nitrogen-enhanced chip protection. ASM Pacific Mini/Micro LED complete solution, low-key cooperation with the world's largest manufacturers, from epitaxy to panel fully automated equipment accelerate Micro LED volume production ASM Pacific Ocean in addition to the Mini LED backlight, Mini LED RGB and Micro LED have the corresponding machine, more able to provide fully automated production line program, from sending to Lei chip and other materials, to the back-end panel process between the machine can be automatically converted, without manual control. The application product also from the initial test sample, enters the quantification commodity stage gradually. The machine for Micro leds focuses on two technical solutions: mass transfer and joint. The Lei chip is captured according to the range given by the customer in stages, put on the temporary storage substrate, and then transferred to the target template for joint. At present, the yield rate of massive joints has reached 99.99-100% . "This year, many customers have been exhibiting Micro LED products made with our devices at various displays! "although we have been working with many companies for more than a year and a half and the finished products are very effective, due to the fact that most of our customers are international manufacturers and the confidentiality is very strict, so ASM Pacific offers its exclusive technology in a low-key way, " Koo said. According to Gu, the manufacturers at this stage include Japan, South Korea, China, Taiwan and many other large panel manufacturers, product application also covers large-size display, mobile phone screen, automotive display, transparent display screen and so on. At present, the installation rate of AD300Pro continues to grow, many customers are ready to use this machine for mass production, and use the ASM Pacific to provide a fully automated program. As a supplier of equipment, Asm Pacific looks forward to the application of Micro leds in transparent displays for vehicles, and predicts that there will be a chance to see cars with transparent display screens for Micro leds in the market by the end of 2020. Micro leds for wearable devices, such as Ar Vr or watches, are expected to hit the market after 2021.