The categories of holes developed in PCBs provide diverse functions and existing special producing issues: In short, the 4-layer board has an inner layer. Concerning the procedure, some traces will likely be etched with the inner layer shaped by lamination. The double-sided board may be drilled immediately after slicing the https://collinagilr.madmouseblog.com/11730561/four-layer-inner-and-outer-layers-2oz-copper-thick-pcb-circuit-board-things-to-know-before-you-buy