Printed Circuit Board Assembly: Process, Tech & Tips

Printed circuit board assembly, known as PCBA, is the practice of soldering or assembly of electronic components to a circuit board. A circuit board prior to assemblage of electronic parts is termed a circuit board. And once electronic components are soldered, the board is termed Printed Circuit Assy (PCA) or Printed Circuit Board Assembly (PCBA).

It needs to be mentioned that assemblage of a circuit board is distinctive from fabricating a circuit board. Manufacturing printed circuit boards encompass several tasks incorporating circuit card designing and setting up PCB prototype. After a PCB board is ready, electronic parts have to be soldered on it prior to being employed in any electronics. This assembly of electronic parts depends upon kind of circuit board, sort of electronic parts and even intent behind the circuit board.

Items Deparately needed for Printed Circuit Board Assemblage

The Subsequent electronic components and elements are important for circuit card assy

Printed Circuit Board
Electronic parts
Soldering products incorporating solder wire, solder paste, solder bar, solder preforms (dependant upon the kind of soldering to be undertaken)
Soldering flux
Soldering gear consisting of soldering station, wave soldering machine, SMT gear, inspection and testing equipment and a lot more.

Right after all of the aforementioned equipment, electronic parts and all raw materials are organized, it’s time to begin the practice of assemblage .

PCB Assemblage with Thru-Hole Electronic Components


Electronic components which have leads coming out and are implanted through very small holes in the circuit card for soldering are classified as through-hole electronic parts. The assy or soldering practice for such elements comprise of wave soldering and hand soldering – Wave Soldering – A PCB assy process in which solder in the shape of solder bar are put in a high-temperature bath. This solder continues to be in the bath in smelted form and forms a wave at quite high temp. The range of temperature is dependent on the sort of solder. Classic tin / lead (Sn/Pb) solder has lower melting point than lead-free (Pb-Free) solder. The PCB board together with the Thru-Hole Electronic parts in holes is passed over molted solder with the help of a conveyor strap. The full wave soldering process incorporates the following stages:

Putting in electronic components
Flux use

As soon as the wave soldering is carried out, the PCBA is cleaned and tested. If any problem or solder joint is discovered, it’ll be sent for alter, which is primarily handled manually. Hand-operated Soldering – Hand-operated soldering is accomplished in fabricating units with less work or in rework / repair tasks. A fine quality soldering station, soldering iron and solder wire and flux are needed during the process.

Surface Mount Technology (SMT) Perfect for SMD Parts

Surface Mount Technology or SMT is a circuit board assembly procedure for SMD (Surface Mount Device) components. SMD components do not have leads or legs. They can be placed on the surface of the circuit board. The equipments, parts along with other soldering materials utilized in this assembly task is unlike thru-hole soldering process.

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