Technological Innovation and Industrial Breakthrough in Wafer-Level EL Testing for Micro-LEDs

Technological Innovation and Industrial Breakthrough in Wafer-Level EL Testing for Micro-LEDs

The industrialization of Micro-LEDs is being severely hampered by the bottleneck of wafer-level electroluminescence (EL) testing. Traditional contact-based EL testing causes chip damage due to physical probes and suffers from low efficiency, while photoluminescence (PL) testing fails to effectively detect electrical defects. This leads to disrupted production cycles and low overall yield, urgently necessitating a fundamental transformation in testing technology to reduce mass production costs. This report will outline the challenges faced by wafer-level EL testing technology for Micro-LEDs and guide an in-depth discussion on how to break through the efficiency and yield bottlenecks via innovative technological approaches.