If you want to achieve multi-function simultaneous operation on a small circuit board, a bare PCB board  cannot make it alone. We need to assembly so many kinds of components on the bare PCB board . This requires step-by-step process , we call it a PCBA. This article will introduce you to the various processes of PCBA production! Come and see it together.

In terms of technology, we make the PCBA  process flow divided into four main links roughly.

And they have the following names.

SMT chip processing → DIP plug-in processing → PCBA testing → finished product assembly.

SMT patch processing link

SMT

In the SMT chip processing process, the components are generally matched and purchased according to the BOM configuration provided by the customer, and the PMC plan of the production is confirmed. After we complete the preparatory work , we would start the SMT programming.And we makes laser stencils according to the SMT process. And solder paste printing is performed.

We need  SMT placement machine to assemly the components on the circuit board. And online AOI automatic optical inspection is performed if necessary. After inspection, we need to set the perfect reflow oven temperature profile and let the board flow through reflow.

After the necessary IPQC inspection, the plug-in material can then be passed through the circuit board using the DIP plug-in process and then flowed through wave soldering for soldering. Then there is the necessary post-furnace process.

After we comple the above processes, we also require QA to conduct a comprehensive inspection to ensure product quality.

DIP plug-in processing link

DIP plug-in processing link

The process of DIP plug-in processing is as following step.

plug-in → wave soldering → foot cutting → post-soldering processing → board washing → quality inspection

PCBA test

PCBA testing is the most critical quality control link in the entire PCBA processing process. It is necessary to strictly follow the PCBA test standards. Amd it is important to test points of the circuit board according to the customer’s test plan (Test Plan).

PCBA testing also includes 5 main forms: ICT testing, FCT testing, aging testing, fatigue testing, and testing in harsh environments.

Finished product assembly

Assemble the shell of the tested PCBA board, then test it, and finally make the shipment.

PCBA production is a chain.And any problems in any link will have a great impact on the overall quality. And we need to control each process strictly .

The above is about the four main links of PCBA process production. Each major link has countless small links to assist. And each small link will have one or some testing procedures to ensure product quality .All the test stepd would do some help to avoid unqualified products from leaving the factory.