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Full-Process Detection Technologies for Micro-LED Advanced Manufacture.

Hao Su¹, Junlong Li¹, Wei Huang¹

¹School of Physics and Information Engineering, Fuzhou University, Fuzhou 350000, People's Republic of China.

Research (Washington, D.C.)

|April 2, 2026

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Detecting defects in micro-light-emitting diode (Micro-LED) displays is crucial for improving manufacturing yield and reducing costs. This review analyzes current detection methods and future trends for efficient Micro-LED chip inspection.

Area of Science:

Materials Science
Electrical Engineering
Optoelectronics

Background:

Micro-light-emitting diode (Micro-LED) displays are emerging as next-generation technology for near-eye, large-scale, and flexible screens.
Effective detection of defective pixels is critical for Micro-LED manufacturing yield and cost reduction.
Current electrical detection methods for Micro-LEDs (<50 μm chips) suffer from low efficiency and high costs.

Purpose of the Study:

To review key indicators for Micro-LED chip detection.
To analyze various detection methods across different manufacturing stages.
To summarize the current state and future outlook of Micro-LED detection technology.

Main Methods:

Literature review of Micro-LED detection techniques.

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Analysis of detection indicators and their relevance.

Categorization of methods based on manufacturing process stages.

Main Results:

Identified key parameters essential for Micro-LED quality control.
Detailed the advantages and limitations of diverse detection approaches.
Highlighted the trend towards enhanced efficiency, accuracy, and cost-effectiveness in detection.

Conclusions:

Micro-LED detection is vital for technological advancement and commercial viability.
Optimizing detection methods is key to overcoming current manufacturing challenges.
Future advancements will focus on high-efficiency, high-accuracy, and low-cost solutions for Micro-LED inspection.