5 Crucial Aspects of PCBA Quality Control

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There are many links involved in the PCBA manufacturing process. It is necessary to control the quality of each link to produce good products. The general PCBA consists of PCB circuit board manufacturing, component procurement, and inspection, SMT patch processing, plug-in processing, and A series of processes such as program firing, testing, aging, etc.

1. PCB Fabrication

Although there are numerous variables that affect PCB quality, copper plating, dust-free exposure, and lamination are the most crucial ones. These quality controls are what we should investigate rather than the surroundings and production facilities. The laminate grades range greatly in price from A to C. Third-party documentation also tell us about the purity management of dust-free plants. High standards for homogeneity and consistency, frequent solution interchange management, and equipment maintenance apply to PCB copper plating. In the course of working on various projects, the copper plating procedure should also be improved.

2. Components Sourcing

Surface mounting technology relies on original branding elements to stop batch faults at their source. Businesses that provide electronic manufacturing services (EMS) should establish an IQC (Incoming Quality Control) position to guarantee that all incoming materials are uniform and consistent. The sample-check of the component's shape, default value, and error limit will be handled by IQC. Additionally, EMS companies should always be improving their component procurement routes.

3. Surface Mounting Technology

To guarantee excellent precision of IC and BGA assembly, EMS businesses should verify the consistency and homogeneity of the solder paste during the SMT process and configure SMT programming appropriately. Every PCB must undergo 100% Automatic Optical Inspection (AOI) and In-Process Quality Control (IPQC). In the interim, we need to ensure that the tray is managed strictly and check the stack list.

4. PCBA Test

Test points are generally reserved by design engineer and relative test plan will be passed to PCBA manufacturer. Circuit voltage and current curve will be analyzed during ICT (In-Circuit Test) and FCT (Function Circuit Test). A collection of these results will be reviewed according to assigned test plan, then confirm the acceptance area, as well as customer future improvements.

5. Managing People

For PCBA manufacturers, well-equipped machines are only small part, the big part is the people management. Manufacturing management team should figure out scientific work flow and monitor the operation guides are handled properly.