PCB Technical - PCBA processing quality management requirements

The global market's demand for electronic products continues to grow, which promotes the rapid development of the electronics manufacturing industry, and the process technology continues to accumulate. With the popularity of smart phones and wearable devices, the lean manufacturing capabilities of electronic products have become more demanding, which inspires more electronic manufacturing companies to pay attention to PCBA processing quality management. This article will focus on the key points of PCBA electronic manufacturing quality management.

1. PCB production

There are many factors that determine the quality of PCB. Among them, the most important substrate material, dust-free exposure, and copper coating are the most important. The audit of PCB factories should not only pay attention to their 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. The copper coating process of the circuit board has extremely high requirements for consistency and uniformity. The replacement management of the solution must be standardized, and the equipment maintenance must be in place. The copper coating process also needs to be summarized and improved repeatedly in practice.

2. Procurement of 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 processing companies need to set up incoming material inspection positions (IQC, Incoming Quality Control), 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.

3. Surface mount technology

In the surface mounting process of SMT chip processing, PCBA electronics manufacturing companies need to ensure that the solder paste printing is uniform and consistent, and the programming 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, In-Process Quality Control) 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.

4. PCBA test

Design engineers generally reserve test points on the PCB and provide corresponding test schemes to PCBA processing 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 (possibly with some test racks), and then the test plans are compared to establish the acceptance interval, which is also convenient for customers to continue to improve. .

5. Management of people

For PCBA electronics manufacturing companies, high-end sophisticated equipment is only a small part of it, and the most important thing is human management. Production management personnel formulate scientific production management procedures and supervise the implementation of each station is the key.

In the fierce market competition, electronic manufacturing companies continue to optimize their internal power and refine their production management is the key to continuously adapting to the market.