Do you known how to produce a high quality pcb in a pcb assembly manufacturing factory?Let me describe for you.
Cutting is the first step to making PCB, according to planning requirements, prior to the base plate cutting into the required size, avoid plate edge burr effect quality, after the cutting edge grinding, rounded corners.After cutting, use drilling machine to drill a circuit connection between layer and layer of guide hole.Drilling, completion of PCB by chemical deposition, sedimentary thickness on surface chemical copper for 20-40 inches.After heavy copper, PCB plating on 200 micro - 500 inches of copper in order to protect the micro 20-40 inches of chemical copper process damage hole after the break.
Precision drilling machine
Staff lead the guests to visit the PCB production line
Bare copper surface need to be developed for the secondary plating copper, copper thickness to meet customer requirements.In the secondary copper plating on the surface of tin plating on a layer of protection, as a protective agent of etching.