Printed Circuit Board (PCB) Manufacture
Steps in the Manufacture of PCBs
The following are the main operations involved in making printed
- Conductive copper is first electroplated onto the
- Unwanted copper is etched away from the
- Multiple-layer boards are made by
adhering thin layers of substrate together.
- Holes for vias and through-hole components are
drilled automatically by
- Solder Plating
- The copper traces are coated to
protect them and prevent oxidation. Some typical coatings are
solder, gold plate, or OSP.
- Solder Resist
- The circuit board is coated with
solder resist in places that are not to be soldered. The
resist prevents traces from being shorted by solder.
- Circuit boards are tested by computerized
equipment before mounting of components. The computer tests each
contact for proper connection to other contacts.
- Surface mount and through-hole components
are placed and soldered onto the PCB. Mounted integrated circuits may be
tested for proper connection by standard tests. Further tests may be
run to the completed board to verify circuit
integrity and proper functionality.