MicroLED Transfer (Pick and place) - Page 2

Following Apple's cancellation of its microLED Watch project, Singapore-based electronics assembly solutions provider Kulicke & Soffa announced that its own so-called Project W (probably referring to the Watch) is cancelled, following a project cancellation by a strategic customer, likely to be Apple. 

K&S says it expects charges, including impairments, in the range of $110-$130 million, most of it due to inventory write-downs and impairment charges relating to long-lived assets.

US-based Terecircuits develops technologies and manufacturing processes for microassembly based on a new class of photo-chemical polymers. The company focuses on the development of a microLED photo-chemical mass transfer process. The company's CEO, Wayne Rickard, will give a talk at the upcoming MicroLED-Connect startup showcase event later this week, and he was kind enough to send us a short update on the company's technology and status, and his views on the microLED industry and market.

Hello Wayne, thank you for your time. Can you tell us a bit about Terecircuits, your technology and current status?

Terecircuits is a Materials Company with leading-edge know-how in synthesis, characterization, and delivery of proprietary encapsulants, polymers, and thin film coatings for the semiconductor and display industries. 

In general, our materials address the unique advanced packaging challenges of precision assembly: die-on-die, heterogeneous integration, 3D stacking, chiplets, SiC die attach, and – as it relates to displays - MicroLED mass transfer.

We're happy to interview Reza Chaji, CEO and founder at VueReal, as part of our series of interviews with MicroLED Industry Association members. Canada-based VueReal developed a unique microLED display production process (which it refers to as a MicroSolid Printing Platform) and the company now offers a turnkey platform that enables its partners and customers to develop a custom display and fabricate it at VueReal's own pilot production line. 

Hello Reza, can you introduce your company and technology?

From the outset, we recognized that microLED solutions should address the formidable challenges of developing smartphone microLED displays to pave the way beyond niche markets. Consequently, our focus has been on developing scalable and cost-competitive technologies tailored for high-volume applications. This strategic approach positions us effectively to address the smartphone sector soon and opens doors to other markets.

VueReal's fundamental technological innovation lies in our transfer solution with unique printing attributes, microSolid Printing. This groundbreaking solution boasts distinct advantages over lasers and pick-and-place methods.

US-based iBeam Materials develops a technology that uses ion-beam to grow microLED devices on a variety of large-area substrates, including thin, flexible large-area metal foils. iBeam's founder and president, Vladimir Matias, will give a talk at the upcoming MicroLED-Connect startup showcase event on February 2024, and he was kind enough to send us a short update on the company's technology and status, and his views on the microLED industry and market.

Hello Vladimir, thank you for your time. Can you tell us a bit about iBeam, your technology and current status?

iBeam Materials is an early stage technology company developing a revolutionary approach to the epitaxial semiconductor growth process required for making LEDs and microLEDs such as in the next generation of displays. Instead of GaN crystal growth on expensive, rigid single crystal substrates that are limited in size, iBeam technology allows growth of the same high-quality semiconductor material on large-area, low-cost metal foil that permits roll-to-roll processing due to its flexibility.

Rayleigh Vision was established in 2023 in Hong Kong, to developed stacked microLED microdisplay technologies. The company's technology enables the stacking of LEDs on top of each other, to create high-density displays. The company's founder and CEO, Prof. Jr-Hau HE, will give a talk at the upcoming MicroLED-Connect startup showcase event on February 2024, and was kind enough to answer a few questions we had regarding the company's status, technology, and his views on the microLED industry and market.

Hello Prof. Jr-Hau, Can you tell us a bit your company, and technology, and your next steps?

Rayleigh Vision is a company that specializes in disruptive MicroLED technology, with a focus on solutions for full-color microdisplays. Our team includes pioneers in MicroLED technology, who have over a decade of experience in this field.

Although we've seen significant advancements in MicroLED technology, challenges remain. These include developing a full-color solution for microdisplays, improving mass transfer efficiency, and enhancing process yields. From the perspective of microdisplays, achieving a full-color display with a high Field of View (FOV) and Pixels per Degree (PPD) is crucial for an immersive Extended Reality (XR) experience. However, no product currently on the market meets these specifications. 

Researchers from Korea's KAIST institute developed a new microLED selective mass transfer process based on micro-vacuum force. The researchers brand their technology as micro-vacuum assisted selective transfer printing (µVAST), and say that it can be used to transfer a large number of microLEDs by adjusting the micro-vacuum suction force.

The process starts by forming small (20 micron, in the researchers demonstration device) holes on glass substrates using fast (7000 holes-per second) laser-induced etching (LIE). The LIE-drilled glass substrate is then connected to vacuum channels, which are controlled for selectively picking up, and the releasing, microLED devices.

MicroLED-Connect is a hybrid event series, a year-long program of virtual and onsite events, all focused on the microLED industry. The first online 2-day webinar was hosted successfully last month, with over 25 lectures (all recordings accessible for pass holders). The next event is a startup showcase, that will be hosted on February 22, 2024.

The startup showcase includes lectures from 8 leading microLED startup companies, covering topics such as microdisplays, AR headset development, microLED production, transfer processes and microLED inspection.

Now is a great time to reserve your ticket and make sure you stay updated with the latest innovation from the following startup companies: Rayleigh Vision, Inziv, Comptek Solutions, QustomDot, Terecircuits, iBeam Materials, Kura Vision and NS Nanotech. You can read the complete agenda here.

US-based eLux was established in 2016 in the USA as a spin-out from Sharp Labs of America, with an aim to develop a massively parallel assembly (transfer) process that enable low cost manufacturing of microLED displays. eLux's president and CEO Jan-Jong Lee will give a lecture at the upcoming MicroLED-Connect virtual webinar on November 2023, and was kind enough to answer a few questions we had.

Hello JJ, can you give us a short intro to your company and microLED product/service?

eLux proprietary fluidic assembly technology (FSA) has several significant advantages over conventional mass transfer methods used for competing microLED displays. Most important is that massively parallel assembly can achieve assembly rates over 5 million devices per hour using simple equipment and assembly can be scaled up to Gen 6 backplanes. eLux welcomes collaboration IP license with display companies to introduce microLED displays to the market.

The MicroLED Industry Association published today a new white paper, that is focused on monolithic microLED integration.

A major challenge in producing MicroLED displays is the transfer stage, also known as Pick and Place. This production step is responsible for transferring individual LEDs from the original wafer to the final display. In some cases, it is possible to (more or less) skip this stage and transfer the LEDs directly to the final display through a process called monolithic microLED integration.

This document will focus on such a process, discuss various options for its execution and examine the types of displays and applications it is suitable for. The white paper is published on the MicroLED Association's website, and is open to the public.