Jaekyun Kim | Advanced View Technology Inc: How do we overcome the inherent mass transfer limitations plaguing microLED display manufacturing?
01:17 - 03:32
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How do we overcome the inherent mass transfer limitations plaguing microLED display manufacturing?
MicroLED technology, while promising superior contrast, brightness, and robustness compared to OLEDs, faces a critical bottleneck: the mass transfer of millions, or even tens of millions, of tiny inorganic LEDs onto a display backplane. This process, essential for pixelation on glass or silicon substrates for applications like mobile and AR/VR displays, demands exceptionally high yield and low-cost assembly to be commercially viable. The industry's primary challenge lies in efficiently and accurately placing these microscopic pixels.
Conventional approaches, such as pick-and-place or electro-fluidic processes, present significant hurdles. Pick-and-place methods, utilizing electromagnetic heads, require multiple release and transfer steps, increasing complexity and potential for error. Electro-fluidic processes, while leveraging fluid motion for assembly, are not inherently straightforward, carrying a high probability of losing microLEDs or misplacing them from their target electrode locations, thus compromising overall display yield and manufacturing efficiency.
In this short video, you can learn:
* The fundamental challenge of mass transferring millions of microLEDs for display pixelation.
* Limitations of conventional pick-and-place methods due to multi-step processes.
* Drawbacks of existing electro-fluidic assembly techniques, including potential for LED loss and misplacement.
#MicroLEDMassTransfer, #PickAndPlaceAssembly, #ElectroFluidicAssembly, #MicroLEDPixelation, #ARVRDisplays, #MobileDisplays
This is a highlight of the presentation:
High accuracy electrofluidic nano LED assembly for AR/VR display applications
More Highlights from the same talk.
04:36 - 06:03
Can a single, room-temperature electrolytic process revolutionize high-density nanoLED integration?
Can a single, room-temperature electrolytic process revolutionize high-density nanoLED integration?
Our unique approach addresses microLED assembly challenges by preparing nanoLEDs as an ink, derived from indium gallium nitride or indium gallium arsenide, which are then dispersed into a solution. This proprietary electrolytic process facilitates the integration of these nanoLEDs onto a substrate at extremely high pixel densities, reaching up to 5,000 pixels per inch (PPI). This level of integration is comparable to advanced vapor mounting processes, yet achieved through a fundamentally different mechanism.
A key advantage of this electrolytic process is its exceptional accuracy, achieving placement precision of approximately 0.1 micrometers in both X and Y directions, rivaling top-down photolithographic methods. Furthermore, the entire assembly is conducted at room temperature, eliminating concerns about process incompatibility that often arise when integrating different color LEDs, which typically require varied growth conditions. This mild processing environment allows for seamless integration of diverse nanoLED types, including blue LEDs with quantum dots or full RGB nanoLEDs.
In this short video, you can learn:
* The preparation of nanoLEDs as an ink for solution-based assembly.
* Achievement of ultra-high pixel densities (up to 5,000 PPI) with high accuracy (0.1 micrometers).
* The benefits of a room-temperature electrolytic process for broad material compatibility and simplified integration.
#ElectrolyticAssembly, #NanoLEDInk, #SubMicronPrecision, #RoomTemperatureProcess, #MicroLED, #ARVRDisplays
07:38 - 10:26
How can AI-driven inspection validate near-perfect yield in ultra-high-density nanoLED assembly?
How can AI-driven inspection validate near-perfect yield in ultra-high-density nanoLED assembly?
Our 5,000 PPI nanoLED assembly process demonstrates remarkable precision, with statistical analysis confirming an average offset of approximately 0.1 micrometers in both X and Y directions for nanoLED placement. This level of accuracy contributes to an exceptional assembly yield of 99.97% at 5,000 PPI. The ability to precisely position these microscopic light-emitting diodes is crucial for the functionality and visual quality of next-generation displays, particularly for high-resolution AR/VR applications.
To rigorously evaluate and validate these high yields, we developed a proprietary AI-powered automated visual inspection (AVI) system. This system acquires images of the assembled substrate, extracts relevant data, and labels each nanoLED. A green box around an LED signifies a correctly placed and functional device, enabling rapid and accurate assessment of assembly quality. This advanced inspection methodology is critical for ensuring the integrity of displays with millions of individual pixels, as demonstrated by achieving 99.99% yield with redundancy for an 800 PPI mobile display.
In this short video, you can learn:
* Statistical validation of 0.1 micrometer placement accuracy for 5,000 PPI nanoLED assembly.
* Achievement of 99.97% assembly yield at 5,000 PPI.
* The role of a proprietary AI-powered automated visual inspection system in evaluating and ensuring high yield.
#nanoLEDAssembly, #AIInspection, #SubMicronPlacement, #HighPPIYield, #ARVRDisplays, #MicroLEDDisplays