PCB News - What problems must be paid attention to in PCBA processing

What problems must be paid attention to in PCBA processing
Auditing a PCB factory should not only pay attention to its scale and environment, but also pay attention to these key quality points. The grades of substrate materials range from A to C, and the prices vary greatly. The cleanliness management of the dust-free exposure workshop can also be known through the documents of a third-party testing agency. There are many factors that determine the quality of PCB. Among them, the most important substrate material, dust-free exposure, and copper-clad copper are the most critical. The copper-clad process requires extremely high consistency and uniformity. The management of solution replacement must be standardized, and equipment maintenance must be in place. The copper coating process also needs to be summarized and improved repeatedly in practice.

What issues should be paid attention to when purchasing components?

Ensure that the components come from the original brand, which is critical to the packaging process, and can prevent batch defects from the source. Electronic manufacturing companies need to set up incoming material inspection positions (IQC) to check the consistency of incoming materials, and sample the appearance, component values, errors, etc. PCBA electronics manufacturing companies also need to continuously optimize their component supplier channels.

Surface mount process requirements for smt chip processing

In the SMT surface mount process, PCBA electronics manufacturing companies need to ensure that the solder paste printing is uniform and consistent, and the program design of the SMT machine is reasonable to ensure the placement yield of high-precision IC and BGA. 100% AOI inspection and manufacturing process quality inspection (IPQC) is very necessary. At the same time, it is necessary to strengthen the management of feeding materials, and strict file management is required from material picking to stacking table.

How to test the PCBA board after it is processed?

Design engineers generally reserve test points on the PCB and provide corresponding test schemes to PCBA electronics manufacturers. In ICT and FCT tests, the circuit voltage and current curves are analyzed, as well as the results of electronic product functional tests (some test frames are available), and then the test plans are compared to establish the acceptance interval, which is also convenient for customers to continue to improve. .
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