PCB News - PCB manufacturers: the relationship between electronic assembly technology and product quality

PCB manufacturers: the relationship between electronic assembly technology and product quality

Electronic assembly technology is the foundation of the electronic equipment manufacturing industry, and electronic assembly welding is its core process; as the result of welding, the reliability of the electrical connection nodes formed by solder joints has a greater impact on the efficiency of equipment products and the service life cycle . Even a simple circuit function module, the number of solder joints far exceeds the number of components; the quality of each solder joint not only directly affects the electrical performance of the product, but also seriously affects the stability of product performance and the reliability of use. The failure of a solder joint may not only cause the components, components or electronic equipment products to fail to achieve the expected function, but also cause the failure of the entire large-scale system. Therefore, the quality of the electronic assembly welding process has become a key factor affecting the reliability of electronic equipment.

The survey results show that about 75% of the soldering quality problems of electronic products are caused by the solder joint failures of the printed circuit board components. Due to the application of a large number of high-density packaging components and new processes, PCBA solder joint defects, difficult detection and positioning, poor visibility and maintainability, and even irreparable consequences. In the process of electrical assembly and welding, solder joint defects are an important factor that directly affects the assembly quality. Some defects are not easy to be found in the inspection process, especially most invisible "virtual welding" and some "cold welding" can only It will be discovered in the later debugging and use process. The quality problem of electronic assembly and welding of electronic products is a systematic project. To solve this problem, we can neither discuss the matter on the facts nor avoid the important ones. Electronic assembly welding quality issues involve five major aspects: design manufacturability, logistics quality, process optimization, management mode and personnel quality. We must not only grasp the main contradictions and the main aspects of the contradictions, but also pay close attention to details, because "details determine success or failure." We must firmly establish the quality concept of no trivial matter for military products and no trivial matter for aerospace! Requirements must be put forward for the process quality control of the entire process of electronic product development and production from four levels of manufacturability design, logistics, process optimization and quality monitoring, covering typical assembly welding process types, new components, new materials, new technology applications and key processes Quality control requirements.

Combining design and process, combining process and process control together, put forward the quality requirements and quality goals of military electronic assembly, as well as the design, material, process optimization and quality monitoring measures to achieve the above quality goals.

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