PCB routing (also known as "milling") is a key process in PCB manufacturing. It refers to cutting and shaping the PCB board with completed circuit patterns through a CNC routing machine (milling machine) to achieve the required design specifications for outline dimensions, hole positions, slot structures, etc.
 
Through the routing process, the PCB board is transformed from a连片 (gang panel) semi-finished product into independent finished boards ready for component installation. Its precision directly affects the subsequent assembly quality, making it a crucial connecting link in PCB manufacturing.