Digitimes: EOSRL achieved a breakthrough in its micro-LED transfer process

In November 2017 we reported that Taiwan's Electronic and Optoelectronic System Research Laboratories (EOSRL, part of ITRI) has launched a project that brings together PlayNitride, LED driver IC designer Macroblock and PCB maker Unimicron with an aim to develop production technologies for high-density Micro-LED displays.

PlayNitride MicroLED array

Digitimes today reports that EOSRL has achieved a breakthrough in its mass transfer technology, and is now able to transfer 10,000 micro-LED chips from an sapphire-based epitaxial wafer onto a substrate within an hour. EOSRL demonstrated the process with PCB, Polyimide and glass substrates. Trial production runs will commence in Q4 2019.

VueReal developed a 30,000 PPI micro-LED microdisplay, will start accepting orders for samples soon

Micro-LED microdisplay developer VueReal will start accepting orders for its first micro-LED display samples by June 2019. The company says that its patented self-aligned technology resulted in a robust and high yield microdisplay production process.

VueReal micro-led microdisplay prototype photo

VueReal says that it developed Micro-LED microdisplays that achieve a brightness of 100,000 nits and a density of over 30,000 PPI - breaking its own world record of 6,600 PPI set in 2017.

In October 2018 VueReal announced that it has raised $8.5 million and that it will build an advanced nano technology fabrication center in Waterloo, Canada - which will include an integrated pilot production system that will use the company's proprietary sub-10 micrometer, high-efficiency, solid printing process at commercial volumes.

Sanan to setup a $1.8 billion Mini-LED and Micro-LED production center in Hubei, China

In September 2018 it was reported that China-based Sanan Optoelectronics started to build its first micro-LED epitaxial wafer and chip production lineand in early 2019 it was reported that Sanan plans to start sampling Micro LED chips as early as January 2019.

Now Sanan announced that it has signed a contract with the Gedian Economic and Technological Development Zone in China's Hubei Province to setup a 12 billion Yuan ($1.78 billion USD) Mini-LED and Micro-LED production site.

Foxconn may produce MicroLED displays or modules at its Wiscon fab in the future

Taiwan-based Foxconn is building a display production fab in Wisconsin, USA. Announced in 2017, the fab changed its designation a few times (from LCD display panel production, to R&D and finally to LCD module production).

Foxconn production line photo

Foxconn now announced that it may also add OLED and Micro-LED production lines in the Wisconsin factory. It did not disclose any more details or timeline, this is certainly not a commitment yet, it's not even clear if the plan is to produce MicroLED panels or assemble modules.

Plessey developed its process to produce native GaN-on-Si green micro-LEDs

UK-based GaN-on-Si MicroLED developer Plessey Semiconductor developed its proprietary 2D planar gallium nitride on silicon (GaN-on-Si) process to emit Green light without the need for color conversion techniques.

Plessey native GaN-on-Si green micro LEDs photo

Plessey says that its native Green LEDs are formed inherently using its proprietary GaN-on-Si epitaxial growth process similar to the native Blue LEDs with the principal difference coming in the amount of indium that is incorporated in the quantum well structures of the LED. The native Green emission is orders of magnitude times brighter than color-converted process for micro-LEDs.

Aledia orders more Micro-LED production equipment from Veeco

In July 2018, France-based 3D GaN LED developer Aledia announced that it has selected Veeco Instruments’s Propel GaN MOCVD system to support its advanced R&D. Veeco's Propel system enables Aledia to process 6- and 8-inch wafers or 2- to 4-inch wafers in a minibatch mode. Aledia also uses Veeco's R&D K465i MOCVD system.

Veeco Propel GaN MOCVD system photo

Aledia and Veeco now announced that Aledia "expands its portfolio of Veeco equipment to develop and produce 3D micro-LEDs". It is not clear what kind of equipment Aledia ordered - and it also seems that the two companies are collaborating to develop next-generation Micro-LED production equipment.

Glo demonstrate its LTPS and CMOS MicroLED displays

US and Sweden based Glo has been developing Micro-LED displays on both LTPS and CMOS (microdisplay) backplanes for many years. The company has been rather queit until now (even though the 2017 investment from Google created some buzz).

Glo: MicroLED vs OLED, LTPS demo 2019

Glo has now started to disclose its technology and achievements. At CES 2019, Glo demonstrated two displays. First up is the 1.5-inch smartphone type display you can see in the image above. The 264 PPI 120Hz display is produced on a LTPS backplane and produces 4,000 nits brightness - you can see how it is much brighter compared to the LGD OLED in the Apple Watch next to it (1,000 nits max).

San'an is expanding its Micro-LED capabilities and facilities

San'an Optoelectronics logoIn September 2018 we reported that China-based San'an Optoelectronics is gearing up to setup its first micro-LED epitaxial wafer and chip production line in Q1 2019, and in early 2019 it was reported that San'n plans to start sampling Micro LED chips as early as January 2019.

In a new press release, San'an announced that it is advancing with its Micro-LED R&D and capacity investment, and the company has filed for 27 patents and has signed several key partnerships. San'an also says that it has "expanded its manufacturing capabilities and facilities for micro-LED production".