Printed Circuit Board Assy Steps, Tech, Tips

Printed Circuit Board Assy Steps, Tech, Tips

Printed circuit board assemblage, commonly known as PCBA, is the procedure of soldering or assembly of electronic parts to a circuit board. A circuit board earlier than assy of electronic elements is named a circuit board. Once electronic components are soldered, the board known as Printed Circuit Assy (PCA) or Printed Circuit Board Assemblage (PCBA).

It has to be pointed out that assy of a circuit board is totally different from manufacturing a circuit board. Fabricating printed circuit boards involve a multitude of processes incorporating circuit board design and making PCB prototype. When a circuit board is ready, electronic materials should be soldered upon it ahead of being used in any electronics. This assy of electronic parts relies on the type of circuit board, type of electronic parts along with application the circuit board.

Things Required for Printed Circuit Board Assy

The Following electronic components and items are important for PCB board assy

  • Printed Circuit Board
  • Electronic elements
  • Soldering supplies for instance solder wire, solder paste, solder bar, solder preforms (with respect to the type of soldering to be conducted)
  • Soldering flux
  • Soldering devices consisting of a soldering station, wave soldering equipment, SMT gear, inspection, and testing equipment and so forth.

After all of the stated above gear, electronic parts and all raw materials are laid out, it is time to begin the operation of assembly.

Printed Circuit Board Assembly with Thru-Hole Electronic Parts


Electronic parts which have leads showing up and are inserted through small holes in the PCB board for soldering are known as Thru-Hole Electronic Parts. The assemblage or soldering procedure of such components contain wave soldering and hand soldering – Wave Soldering – A circuit card assembly process where solder in the type of solder bar are put in a high-temp bath. This solder stays in the bath in molten form and makes a wave at extremely high temp. The variability of temperature will depend on the sort of solder. Common tin/lead (Sn/Pb) solder has a lower melting point than lead-free (Pb-Free) solder. The PCB together with the thru-hole electronic components in holes is passed over molted solder with the assistance of a conveyor belt. The full wave soldering procedure consists of the subsequent steps:

  • Inserting electronic components
  • Flux use
  • Pre-heat
  • Cleanup
  • Testing

Once the wave soldering is established, the PCBA is cleaned out and examined. If any problem or solder joint is found, it will be sent back to change, which is mainly done manually. Hand Soldering – Manual soldering is carried out in making plants with less workload or in rework/repair jobs. A high-quality soldering station, soldering iron and solder wire and flux are needed along the way.

Surface Mount Technology (SMT) Suited to SMD Components

Surface Mount Technology or SMT is a PCB board assembly process for SMD (Surface Mount Device) parts. SMD elements don’t have leads or legs. They’re just placed on the surface of the circuit board. The machines, elements and also other soldering material applied in this assembly process is distinctive from thru-hole soldering operation.


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