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Yield Intelligence for High-Density MicroLED Manufacturing

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Challenge

A leading microLED manufacturer faced an unprecedented data challenge driven by next-generation display architectures. Each die contained over 3 million individual pixels, with every pixel generating multiple electrical, optical, and inspection measurements throughout the manufacturing lifecycle—resulting in over 10 billion data points per wafer.

Conventional yield systems—built for die- and wafer-level analysis—were no longer sufficient. The manufacturer required a fundamentally new approach: a yield platform capable of operating at the pixel level as the primary unit of analysis, delivering true spatial resolution and deep parametric insight at extreme scale.

Solution

The solution enabled seamless ingestion and unification of heterogeneous datasets across the manufacturing flow—including electrical test data from ASIC wafers, high density pixel data from MicroLED display panels, and process data from the bonding stage.

A key challenge addressed was the alignment of fundamentally different data structures and coordinate systems—ranging from die-level electrical measurements to millions of pixel-level data points per display panel die. The platform normalized and spatially mapped these datasets into a single, coherent analytical framework, preserving full traceability across all domains.

In addition, the solution ingested KLARF-based defect and metrology data, including associated inspection images, enabling direct overlay of defect signatures onto electrical and optical test results. This unified view empowered engineers to perform advanced analytics such as root cause identification, killer defect ratio analysis, and spatial correlation across process, defect, and test domains.

Results: Unified Analytics for AR/VR MicroLEDs

Integrated Data Foundation

Seamless fusion of wafer images and pixel-level test data.

AI-Driven Intelligence

Automated outlier detection and scalable defect classification

Pixel-Optimized Control

Advanced limits management and binning at pixel resolution

End-to-End Traceability

Full visibility from wafer → pixel → module → device

Cloud-Scale Performance

Petabyte-scale processing for high-density pixel datasets

Quality & Reliability Impact

Enhanced quality, reliability, and supply chain traceability

TCO & ROI Optimization

Reduced infrastructure costs, faster yield learning, and accelerated time-to-market
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Features Section
Device Layout Integration
Define ASIC and Display Panel Wafer Bonding Rules & Criteria - Normalizing Coordinates - including Coupon Die/Test Structures
Pixel-Level Clustering Analytics
Detailed Pixel Level Analysis - for different testing patterns, frequencies, voltages on 10Billion+ data points. Automatically identifying random and systematic failing pixels, dim, bright and heat maps and more.
ASIC & Pixel Data Analysis

The solution enabled bonded wafer analysis by coupling electrical data, pixel-level data, and test structures into a unified framework. This allowed precise correlation of failing bonded die, bridging ASIC performance with pixel behavior.

Engineers can drill down to individual data elements to identify root causes of yield loss, including parametric drift, spatial anomalies, and dead or dim pixels—linking failures directly to process variations, bonding issues, or physical defect.

AI enabled data analysis that digs deeper into the data and finds anomalies that were previously not detected.

Statistical & Visualization Tools

Parametric wafer maps, heat maps, defect maps, histograms, box plots, and trend charts—along with statistical calculations such as quartile and interquartile range (IQR)—were enhanced for greater accuracy and reliability.

Improvements to chart rendering, data grouping, limit handling, and die-level filtering ensured consistent analysis and robust, production-ready workflows

Sharpen Your Competitive Edge

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WATS

Partner

Envelope
WATS is a test data management and analytics platform developed by Virinco, built to collect, standardize, and analyze data from electronics manufacturing test systems. It provides real-time visibility into board-level performance across ICT, functional test, and final test operations, helping engineers monitor yield, detect anomalies, and improve quality at high volume.

EnlightTec

Partner

Envelope
Enlight Technology is one of the few domestic electronic design automation (EDA) solution providers. Our primary mission is to develop chip and electronic hardware, as well as system development tools, striving to help customers bring their products from concept to market with the best efficiency and effectiveness.
We integrate EDA technology resources and solutions, leveraging practical experience and technical support capabilities to build a complete cross-disciplinary ecosystem covering silicon photonics, chips, advanced packaging, systems, and manufacturing. Enlight Technology is one of the very few Taiwanese EDA solution providers with both electrical and optical design capabilities. It offers one-stop support, from silicon photonics (PIC) optoelectronic integration circuit design and EIC–PIC co-design, to end-to-end design verification of ICs, packages, and PCB systems:

  • Silicon Photonics & EIC–PIC Co-design
  • IC Design & Verification
  • PCB Systems Design & DFM (Design for Manufacturability)
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Modus Test

Partner

Envelope
Modus Test, LLC was founded on the idea that there are creative ways to improve results by combining innovation with the best known methods in test design and manufacturing. Providing innovative test solutions include the MPT series of parametric test and systems and accessories.
Modus Test has a global presence and the capability to support customers in all the IC development centers and high volume manufacturing sites around the world. See for yourself how combining innovation with best-known methods can improve your results.
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PTC

Partner

Envelope
PTC is a semiconductor consulting firm based in Malaysia, providing strategic and technical consulting services to semiconductor manufacturing, assembly, test, product and ecosystem companies across Asia. yieldWerx, a leading innovator in semiconductor yield management solutions, and PTC, a premier Malaysia-based consulting firm for the semiconductor manufacturing industry, have announced a strategic collaboration to address the growing need for comprehensive data analytics across the semiconductor manufacturing lifecycle in the rapidly expanding markets of Malaysia and India.
This collaboration combines yieldWerx’s state-of-the-art analytics platform with PTC’s extensive industry knowledge and regional presence to strengthen semiconductor manufacturing capabilities across East Asia. By providing sophisticated analytics solutions tailored to regional needs, yieldWerx and PTC aim to streamline factory setup and operations, implement rigorous quality assurance protocols, and accelerate the development of sustainable semiconductor ecosystems across both countries. PTC will act as the regional consulting partner, offering advisory, deployment support, and strategic integration services to fabless clients, OSAT facilities, and manufacturing startups adopting the platform.