PCB News - Five requirements for PCBA processing quality management

Five requirements for PCBA processing quality management
At present, the country has higher and higher requirements for environmental protection and greater efforts in link governance. This is a challenge but also an opportunity for PCB factories. If the PCB factory is determined to solve the problem of environmental pollution, then FPC flexible circuit board products can be at the forefront of the market, and the PCB factory can get the opportunity to develop again.
The human 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 electronics manufacturing companies to pay attention to PCBA processing quality management. Xiao Qiancheng will introduce you to the key points of PCBA electronic manufacturing quality management. .

1. PCB production

There are many factors that determine the quality of PCB, among which the most important substrate material, dust-free exposure, and copper coating are the most critical. When reviewing PCB factories, 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. Component procurement

Ensure that the components come from the original brand, which is the key to the packaging process, which can prevent batch defects from the source. Electronic manufacturing 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 SMT chip processing surface mounting process, PCBA electronics manufacturing companies need to ensure the uniformity and consistency of solder paste printing, and the programming of SMT machines is reasonable to ensure the high-precision IC and BGA placement yield. 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 plans to PCBA processing electronics manufacturers. In ICT and FCT tests, analyze the voltage and current curves of the circuit, as well as the results of the functional test of electronic products (possibly with some test racks), and then compare the test plans 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 aspect, and the most important thing is human management. The key is for production managers to formulate scientific production management processes and supervise the implementation of each station.