PCB Fabrication Process
To be a high-quality PCB, a printed circuit board needs to experience a series of processing steps. In this article, EPCB will give a brief introduction for some of them.
Laser Drill: If you want a really tiny via, drilling vias by a laser machine is the best way, because a beam of light 20 microns (1 Mil) in diameter can easily fabricate a smaller micro-via. Besides, even metal and glass can be drilled by high influence beams.
Post Etch Punch: Punching core material is the only acceptable method of building precision tooling.
Drill: Computer numerical control machines are able to make drill and profile routing software, which can promise high performance and productivity.
Plating: The plating process is usually fabricated by automated plating lines which can largely reduce the quick turn and improve the output.
Automated Optical Inspection (AOI): The automated optical inspection equipment is used to check internal and external layers.
Routing and Scoring: Routing and scoring are the last fabrication step before electrical testing. Constant monitoring by engineering ensures parts will meet your specifications.
Electrical Test: Electrical test is the final step in the whole fabrication process. Flying probe testers or bed-of-nail testers are used to 100% electrical test all PCB's on site at manufacturing.