ROHS 94v0 Double Sided Copper Clad Board 12V LED Rock Light

Heavy copper PCB is divided into a single-layer thick copper plate, double-sided thick copper plate and multilayer thick copper plate. The minimum hole (distance or line from one edge of something, through its center, to the other edge) of mechanical drilling during production is from 0.4mm down to 0.2mm or even smaller, so the metal hole (distance or line from one edge of something, through its center, to the other edge) is getting smaller and smaller. Metallization on which board layers and interlayer interconnects depend The hole directly affects the reliability of the heavy copper PCB. (steps are taken to prevent trouble or injury) for the manufacturing process of heavy copper PCB.