Three Companies New Tendency Of MicroLED Mass Transfer Printing

- May 22, 2018 -

Mass transfer printing (MTP) is the main bottleneck in current Micro LED production. How to solve this technical problem has become a key link in the cost reduction and mass production of Micro LED, and it has also plagued the industry giants who are actively deploying Micro LED.

Foxconn acquires eLux

Recently, it was reported that Foxconn has frequently acted on the layout of Micro LED, investing Epileds and acquiring eLux. The purpose of investing Epileds for the future development of Micro LED may require RGB three-color LED epitaxial/grain manufacturing technology; the acquisition of eLux is intended to solve the technical problem of mass transfer.

It is reported that eLux was established in the United States in 2016 to develop a scalable "fluid" assembly process to create Micro LED devices. In 2017, Foxconn invested 10 million US dollars in eLux through its subsidiary CyberNet Venture Capital and formally acquired eLux in 2018.

According to LEDinside's review of elux's patent layout, eLux's patents include a large-scale transfer technology, an optical management system for Micro LED displays, a system and method for repairing micro LED displays, and a system and method for printing light-modifying structures using Micro LED displays. And surface mount display methods made of Micro LED elements.

Apple acquires LuxVue

In 2014, Apple acquired LuxVue Technology, a startup that develops Micro LED displays. LuxVuew raised US$43 million in funds before Apple’s acquisition. Apple will continue to research and develop Micro LED technology and establish research and production facilities in Taoyuan, Taiwan.

According to a report in 2017, Apple plans to begin production of Micro LED devices in small batches before the end of the year and begin mass production in 2018. According to external analysis, Apple's first goal is to use Micro LED displays in smartwatch iWatch.

OSRAM signs agreement with X-Celeprint

OSRAM, who had been focusing on Micro LED since the previous year, disclosed an IP-related news on the official website at the end of March this year. OSRAM Opto Semiconductors and X-Celeprint have signed a technology and patent license agreement, and this agreement involves X-Celeprint's Micro-Transfer-Printing (μTP) technology.

“Because of this technology, we will be able to develop LED products that meet the requirements for miniaturization and versatility,” said Martin Behringer, Ph.D., director of advanced development at OSRAM Opto Semiconductors. In addition, it provides new innovations that combine different technologies quickly and accurately. method."

According to statistics, X-Celeprint, a start-up company in the United States, is XTRION N. V's wholly-owned subsidiary, whose core technology is John A. of Illinois University, USA The Micro-Transfer-Printing (μTP) technology developed by Rogers et al. uses a sacrificial layer wet etching and a PDMS transfer technique to transfer a Micro LED onto a flexible substrate or a glass substrate to make a Micro LED array. Deported to Semprius, Inc., and obtained exclusive license from X-Celeprint in 2013. The advantage of this process is that it can transfer a large number of Micro LEDs at a time. The company's subsequent patent application is based on an extension of this technology.

In addition, X-Celeprint also developed Micro LED display technology, mainly to solve the problem of the low yield and efficiency of Micro LED due to the complex structural design.

So far, the three main forces that have developed Micro LED technology and have achieved a lot in the massive transfer have been collected by Foxconn, Apple, and Osram.

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