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The reliability of PCB solder joint quality determines the reliability and service life of PCBA products. Once the solder joint fails, the PCBA will be repaired or scrapped. Improving the reliability of solder joints is one of the processing goals of electronic processing plants.
PCB processing
The main reasons for the failure of PCB processing solder joints:
1. Poor component pins: plating, pollution, oxidation, coplanarity.
2. Bad PCB pads: plating, pollution, oxidation, warpage.
3. Solder quality defects: composition, impurity, and oxidation are not up to standard.
4. Flux quality defects: low solderability, high corrosion, low SIR.
5. Defects in process parameter control: design, control, and equipment.
6. Defects of other auxiliary materials: adhesives, cleaning agents.
Methods to improve the stability of PCBA solder joints:
The stability experiment of PCBA solder joints includes stability experiment and analysis. On the one hand, its purpose is to evaluate and identify the stability level of PCBA integrated circuit devices, and to provide parameters for the stability design of the whole machine.
On the other hand, during PCBA processing, it is necessary to improve the stability of solder joints. This requires the analysis of failed products, find out the failure mode, and analyze the cause of the failure. The purpose is to modify and improve the design process, structural parameters, welding process, and improve the yield of PCBA processing. The failure mode of PCBA solder joints is the basis for predicting its cycle life and establishing its mathematical model.
The benefits of PCB proofing production
Free proofing
One of the benefits of proofing during PCBA processing is to increase productivity and production processing speed. Whether it is to produce and process PCBA processing technology boards in the form of outsourcing, or the production department of the enterprise first proofs samples and then mass-produces, it is equivalent to making finished products in advance, checking for omissions, and finally changing them into qualified products, and then using them as samples for mass processing and production, the efficiency is natural Will improve a lot.
Secondly, another advantage of PCBA processing and proofing is cost reduction. Whether it is an urgent order or a non-urgent order, PCBA proofing can ensure that the subsequent production and processing process is smoother, and related material management and personnel management can also be arranged and arranged according to the PCBA proofing process. Therefore, it can effectively eliminate human resources and Waste of material resources.
Finally, for PCBA production and processing technology, the smaller the error, the better the quality. One of the purposes of PCBA proofreading is to reduce the occurrence of errors. At present, proofing can indeed reduce errors in the entire PCBA processing technology, especially in urgent orders and batch orders. PCBA proofing is the best way to reduce the occurrence of errors. In addition, PCBA proofing will also be carried out in small batch orders to ensure quality.
