DELO validates reliability of adhesives in miniLED connections, paving way for scalable microLED production
About Optica
14 October 2025
DELO validates reliability of adhesives in miniLED connections, paving way for scalable microLED production
Windach,
Caption: Schematic illustration showing the process of miniLED integration on a PCB: before placement, after placement, and with the LED illuminated through adhesive connection (figure: DELO).
The evaluation included light-on validation, U‑I characteristic measurements, and die-shear testing. Results showed stable mechanical strength and excellent electrical performance over time, closely matching the specifications from the LED data sheets, even after prolonged exposure to elevated heat. A critical test scenario combined both heat and humidity, which typically challenges solder-based connections. Even under the most demanding conditions, directional conductive adhesives remained reliable, underscoring their suitability as a robust connection technology for next-generation displays.
Next steps for miniLED and microLED manufacturing
“These results show that directional conductive adhesives are not only technically feasible for miniLEDs but also reliable in long-term conditions that realistically reflect industrial environments,” said Maximilian Baum, Director Product Management Consumer Assembly & Equipment at DELO. “With these findings, adhesives move from a feasibility concept to a validated connection technology—one that both refines miniLED production and accelerates the transition to mass-market microLED displays.”
Experts from DELO will present these findings at MicroLED Connect, the leading global event on microLED technology, taking place in Eindhoven, Netherlands, on September 24–25. Alternatively, the detailed results are available in DELO’s latest white paper: https://www.delo-adhesives.com/service/whitepaper/miniled-microled-connecting-reliability/.
This new study is one of the many advanced evaluations DELO undertakes each year to anticipate industry needs, in addition to more than 3,000 customer-specific tests. The company’s high-tech adhesive solutions serve global leaders across the semiconductor, automotive, and consumer electronics industries.
Matthias Stollberg
