Printed Circuit Board Assembly (PCBA) - China PCBA Supplier

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Printed Circuit Board Assembly Definition

Our everyday lives are significantly impacted by electronics. Electronic components are found in everything, even in our cars and smartphones. These electronics' central component is a printed circuit board, or PCB. Never think of them as PCB board embellishments. Only when components are installed on it can an advanced circuit board operate. An assembled PCB is a printed circuit board (PCB) that has components installed on it; the manufacturing process is known as PCB assembly, or PCBA for short.

Thus, how precisely are these gadgets made? There are multiple automated and human processes in the straightforward PCB construction process. A board manufacturer can select between human and automated choices at every stage of the process.

How Do PCBA and PCB Relate to Each Other?

The two distinct outcomes of the same general procedure are PCB and PCBA. A PCBA is a finished assembly that has every component needed for the board to operate as needed for the intended use, whereas a PCB is a blank circuit board without any electrical components connected. A PCBA is prepared for usage in an electrical device, whereas a PCB is not yet operational.

Due to the numerous parts and steps needed in PCB assembly, creating a blank board is a less complicated procedure than creating a finished PCBA. A PCBA is likewise more expensive to build than a PCB that is blank. Nonetheless, to produce a finished board, both procedures are required. Without a PCB, a PCBA cannot be made. The initial stage of the process is PCB manufacture, which is followed by PCBA production. The packaging used for PCBs and PCBAs is another distinction. PCBAs must be packaged using compartmental or anti-static packaging, whereas PCBs are normally packaged using vacuum packing.

Electronic components

Soldering materials including solder wire, solder paste, solder bar, solder preforms (depending on the type of soldering to be done)

Soldering flux

Soldering equipments including soldering station, wave soldering machine, SMT equipment, inspection and testing equipment etc.

Once all of the above equipment, electronic parts and all raw materials are arranged, it is time to start the assembly process.

Printed Circuit Board Assembly with Thru-Hole Electronic Components

Electronic components that have leads coming out and are inserted through tiny holes in the PCB for soldering are called thru-hole electronic components. The assembly or soldering process for these components include wave soldering and hand soldering – Wave Soldering – A PCB assembly process in which solder in the form of solder bar are put in a high-temperature bath. This solder remains in the bath in molten form and forms a wave at very high temperature. The range of temperature depends on the type of solder. Traditional tin / lead (Sn/Pb) solder has lower melting point than lead-free (Pb-Free) solder. The PCB with all the thru-hole electronic components in holes is passed over molted solder with a help of a conveyor belt. The whole wave soldering process includes following steps:

Inserting of electronic components

Flux application

Preheat

Cleaning

Testing

Once the wave soldering is done, the PCBA is cleaned and tested. If any fault or solder joint is found, it is sent for rework, which is generally done by hand. Hand Soldering – Hand soldering is done in manufacturing units with less work load or in rework / repair jobs. A good quality soldering station or soldering iron and solder wire and flux are used in the process.

PCBA Supplier:SHEN ZHEN Kingsheng PCBA TECH.Co,.Ltd