MicroLED inspection

Israeli-based display inspection developer InZiv has recently expanded its management team, as the company reports increased interest in its microLED inspection systems. Dr. Tali Hurvitz has joined InZiv as its new R&D manager, bringing with her years of experience in the flat panel display industry and in the technology sector in general.

Dr. Tali Hurvitz earned her BSc, MSc, and PhD from Tel Aviv University, where she focused on physics and materials science. She has held significant positions, including her latest role as the Head of the Physics, Materials, and Innovation group at KLA, and has previously worked in various capacities within the technology sector. Dr. Tali will now lead InZiv’s R&D as the company matures and expands its solution portfolio.

Hello Dr. Tali, we first of all want to wish you the best of luck at InZiv. What drew you initially to the field of physics and materials science? 

As long as I remember myself, I preferred technical toys (like LEGO) to social ones (like dolls…). When in middle school I was directed to participate in cooking classes, while the boys went to study electronics - I rebelled and joined the boys! It was inspiring to learn how simple and straightforward electricity was. It is either zero or one. That led to my studying electronics in high school. My plan was to continue to higher education in that field as well. However, before starting my first year I took a preparation course in Physics - and I was hooked, till this day. Understanding the physical laws around us and forming these laws in simple equation - it's like magic!

We're happy to interview Tobias Steinel Ph.D., works as a product manager at Instrument Systems GmbH, as part of our series of interviews with MicroLED Industry Association members. Germany based Instrument Systems manufacturers high-precision spectrometers, complex systems and software solutions for spectral light measurements.

Tobias is responsible for Instrument Systems’ measurement portfolio in the field of microLED optical testing and AR/VR/MR applications.

Can you please introduce your company and technology? 

With facilities in Munich and Berlin, Germany, Instrument Systems develops and produces high-end light measurement technology for flat panel displays, micro-displays, near-to-eye displays, automotive lighting, VCSEL systems and LED/SSL modules. Our color and light measurement solutions are used in display production sites worldwide. In addition to the manufacture of measuring equipment, our core competence is that our accredited test laboratory guarantees independent, reliable and comparable measurement results for every measuring device purchased. These can be traced back directly to the reference standards of national metrology institutes.

We're happy to introduce WEVE , a South Korean microLED inspection solution developer. The company collaborates with Korea’s largest display manufacturers, and is now approaching the global markets with its systems and solutions.

Can you introduce your company and technology?

WEVE is based in South Korea, and we specialize in Micro LED inspection solutions. Our technology is trusted by the biggest display manufacturers in Korea. We closely cooperate with industry-leading companies from Taiwan, Europe, and China. As a key technological partner of leading manufacturers, we have had to keep our operations out of the light for some time, which is why there is not much information about us available yet.

We do simultaneous AOI, PL, and Color difference analysis (xyY) of CoW, Epi-Wafers, and panels. We provide highly accurate, stable, and reliable solutions that can withstand high-volume inspections and the hardships of 24/7 heavy operations. I believe that WEVE is among the world's top companies by the total number of Micro LED wafers inspected thanks to our partners and customers who on one hand required us to keep things low but on the other, opened rare opportunities to sharpen our technology. Significant Inspection volumes provided valuable insights and experience needed to be at the frontier of the inspection field.

InZiv manufactures rapid EL testing and inspection systems for microLED development and production. The company has deployed several systems at leading display makers all over the world, and has recently launched its first mass production tool. David Lewis, the company's CEO and co-founder, was recently interviewed by display industry consultant Ian Hendy.

You are CEO of InZiv in Jerusalem. Can you tell me a little bit about the company and what makes it special?

InZiv is the technology leader in rapid EL (electroluminescent) testing and inspection for microLEDs. Currently, the quality of microLED wafers is simply not where it needs to be, and the most reliable and accurate way to get both electrical and optical information from each and every die on the wafer is EL testing.

InZiv has a proprietary method for making contact with the microLED wafer, without any damage, and at very high speeds. We offer, on average, 6M dies per hour test speed in our first mass production tool, and intend to double that in the next generation. We have a roadmap beyond that for even higher throughputs. Users understand that die densities are going to increase as microLED chips get smaller and move from flip chips to vertical chips, so a valuable tool supplier needs a roadmap that can cope with the speed race, and we have such a roadmap.

MicroLED display developer VueReal announced a strategic partnership with Toray Engineering. As part of this collaboration, VueReal will integrate Toray's TASMIT 3000SR-Ⅲ300 PL inspection tool into its turnkey MicroSolid Printing platform. The announcement mentions several customized and optimized tools, but does not provide more details.

VueReal and Toray say that the PL inspection tool 3000SR-Ⅲ300 seamlessly integrates with VueReal's MicroSolid Printing platform to further reduce surface inspection device review time and contribute to greater inspection efficiency. This system acquires images of defects with a high level of magnification and categorizes defect types.

Last month Apple decided to cancel its microLED Watch project, which had very bad consequences for many microLED developers. Ams-Osram is still considering its options and it estimates its loss at $650-900 million, while Singapore-based electronics assembly solutions provider Kulicke & Soffa announced that it was also effected, to the tune of $110-130 million as it cancelled its own project with Apple.

KLA Corporation recently announced that it is withdrawing from the FPD market altogether. The company entered this market when it bought Israeli Orbotech for $3.4 billion, developer of inspection equipment for the semiconductor and display industries. 

Toray Engineering announced a technical partnership with semiconductor test equipment supplier Advantest Corporation, to promote efficient combined production systems for miniLEDs and microLED displays.

Toray Engineering will able to offer a combined inspection, transfer, and mounting systems, by data linking its systems with Advantest's inspection equipment. The company says that these integrated systems will enable the acceleration of microLED R&D and production. 

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. 

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.

Exaddon developed a unique micro 3D Printing technology that enables it to produce probes that can access and test pads and bumps with pitches of less than 20 micron. The company says that this unique method halves the current limit of fine-pitch probing, enabling microLED developers testing options that haven't been available before.

Exaddon's μ3D printing technology delivers high quality printed metal with micrometer resolution. Exaddon’s initial microLED test array is 3D printed directly on prepatterned traces with a pitch of less than 20 μm; This demonstrator validates Exaddon’s process on microPCBs for mounting on current probe heads. With 128 probes, the array gives microLED testers a 64x increase in efficiency.