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Research on PCB Thick-Dense Board Light Source Design and LED Lighting System for PCB Thick-Dense Board Circuit Inspection
Abstract With the rapid development of high-density interconnect (HDI) and multilayer printed circuit boards (PCBs), the inspection of thick-dense PCBs has become increasingly challenging. Traditional optical inspection methods often fail to provide sufficient illumination uniformity and contrast for detecting defects in thick and densely packed PCB layers. This paper presents a specialized LED lighting system…