Akchheta Karki | Holst Centre: How do we achieve sub-600nm alignment precision for heterogeneous photonic integration?
00:13:01 - 00:14:48
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Summary of the clip:
How do we achieve sub-600nm alignment precision for heterogeneous photonic integration?
Integrated photonics demands alignment tolerances far more stringent than micro-LED displays, requiring precision below 1 micrometer and sometimes down to 200 nanometers for efficient optical coupling. LIFT technology bridges this gap by demonstrating full compatibility with commercial indium phosphide (InP) foundry coupon architectures.
Using a specialized acceptor technology, InP photonic dies are released and placed onto silicon-on-insulator (SOI) or silicon nitride waveguides with a one-sigma placement precision of under 600 nanometers. This extreme accuracy translates directly to simulated optical coupling efficiencies exceeding 85%.
By ensuring pristine material interfaces and eliminating physical tool contact, this laser-assisted process provides a scalable roadmap for high-throughput packaging of co-packaged optics and silicon photonics.
In this short video, you can learn:
* The critical placement and coupling tolerances required for integrated silicon photonics.
* How InP foundry coupons are processed and transferred using laser-assisted techniques.
* The relationship between sub-600nm alignment accuracy and 85% optical coupling efficiency.
๐ **Clip Abstract** This clip details the application of LIFT technology to integrated silicon photonics, showing successful transfer of indium phosphide (InP) dies. The system achieves sub-600 nm placement precision, enabling simulated optical coupling efficiencies of over 85% on silicon waveguides.
#LaserInducedForwardTransfer, #IndiumPhosphide, #HeterogeneousIntegration, #SubMicronAlignment, #SiliconPhotonics, #CoPackagedOptics
This is a highlight of the presentation:
High Precision at Light Speed: Laser-Assisted Die-to-Wafer Assembly for microLEDs and Integrated Photonics
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00:02:20 - 00:03:58
Can laser-assisted transfer achieve stable, sub-micron placement accuracy at microsecond speeds?
Can laser-assisted transfer achieve stable, sub-micron placement accuracy at microsecond speeds?
Laser Induced Forward Transfer (LIFT) operates on ultra-fast timescales, where a single laser pulse releases a micro-component in under one microsecond. High-speed camera tracking reveals that the die travels in a highly controlled manner across the z-axis, maintaining stable velocity and trajectory over typical transfer gaps.
Empirical testing of multiple dies shows that even after traveling 30 micrometers (at 5 microseconds) or 60 micrometers (at 10 microseconds), the positional standard deviations remain exceptionally low, hovering between 0.85 and 1.0 micrometers. This confirms that LIFT is not a chaotic ejection but a highly reproducible, deterministic propulsion mechanism.
These precise sub-micron statistics scale successfully across larger transfer areas, paving the way for high-yield mass production of micro-displays and optoelectronic systems without physical contact.
In this short video, you can learn:
* How high-speed imaging tracks micro-component release dynamics in under 1 microsecond.
* The exact spatial deviations of dies across 30-micron and 60-micron transfer gaps.
* Why the LIFT process is highly reproducible across multi-die arrays.
๐ **Clip Abstract** This clip explores the fast-dynamic physics of Laser Induced Forward Transfer (LIFT) during component release, demonstrating stable die travel at microsecond timescales. By tracking spatial deviations, researchers confirmed that LIFT yields sub-micron reproducibility over 30 to 60 ยตm transfer gaps.
#LaserInducedForwardTransfer, #LaserAssistedTransfer, #SubMicronPlacement, #DeterministicPropulsion, #MicroLEDDisplay, #HeterogeneousIntegration
00:08:41 - 00:10:40
Why is laser-selective repair the key to unlocking 100% micro-LED display yields?
Why is laser-selective repair the key to unlocking 100% micro-LED display yields?
When handling micro-LED dies down to 60x60x10 micrometers with tight 20-micrometer edge-to-edge spacing, conventional pick-and-place tools fail. LIFT technology demonstrates a transfer yield of 99.93% for runs of 10,000 commercial dies, leaving only a handful of missing or misplaced units.
Because display manufacturing demands absolute zero-defect pixel yields, an efficient repair strategy is crucial. Rather than relying on slow, custom-fabricated mechanical stamps, LIFT enables dynamic "on-demand" laser-selective repair to place missing pixels rapidly without disturbing neighbors.
This laser-driven repair loop bypasses the expensive tooling bottlenecks of traditional stamp-based methods, cutting down cycle times and lowering manufacturing costs for next-generation displays.
In this short video, you can learn:
* The spatial tolerance challenges of transferring 60-micron dies with 20-micron spacing.
* Why a 99.93% assembly yield still requires a fast, non-contact repair solution.
* How laser-selective on-demand shooting outperforms mechanical stamp-based repair.
๐ **Clip Abstract** The speaker addresses the yield bottlenecks in micro-LED display assembly, highlighting a 99.93% transfer yield for 60x60 ยตm dies with tight spacing. They introduce a non-contact, laser-selective repair strategy that rapidly fills missing pixels, surpassing traditional mechanical stamping methods.
#LaserInducedForwardTransfer, #LaserSelectiveRepair, #MicroLEDMassTransfer, #NonContactTransfer, #MicroLEDDisplays, #AdvancedPackaging