6 Layer Any-Layer HDI PCB with 0.1mm Laser Microvia, ENIG and Black Solder Mask This 6-layer any-layer HDI PCB uses a full any-layer microvia structure for maximum routing density in miniaturized medical, wearable and RF modules. Precision laser drilling and fine-line imaging equipment are the core of the process, delivering 0.1mm microvias and 0.05mm traces with strict diameter and registration tolerances. Production Equipment Precision UV Laser Drilling Precision UV laser