[LCT5-2] Application of Liquid Crystal Films for Micro-LEDs Inspection | The 32nd International Display Workshops (IDW '25)

The 32nd International Display Workshops (IDW '25)

Dec 2 - Dec 5, 2025International Convention Center Hiroshima

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The 32nd International Display Workshops (IDW '25)

Dec 2 - Dec 5, 2025International Convention Center Hiroshima

[LCT5-2]Application of Liquid Crystal Films for Micro-LEDs Inspection

Shuo-Hsien Chen¹, Yan-Rung Lin², *Shie-Chang Jeng¹(1. National Yang Ming Chiao Tung University (Taiwan), 2. Industrial Technology Research Institute (Taiwan))

https://doi.org/10.36463/idw.2025.0071

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Keywords:

Micro-LED,Liquid Crystal Films,Non-contact inspection

We demonstrate a method for inspecting micro-LEDs by placing a liquid crystal (LC) film over the micro-LED wafer. When illuminated, micro-LED dies can generate an open circuit voltage through the photovoltaic effect, which can be detected by observing changes in the transmittance of the LC film.

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