PCBA Tech - Precautions and improvement of quality during SMT processing

Matters needing attention when SMT patch processing

1. Be sure to pay attention to electrostatic discharge measures during SMT chip processing. It mainly includes the design of the chip processing and the re-establishment of the standard of capacity, and the sensitivity of electrostatic discharge during SMT chip processing, so as to respond The treatment and protection measures are very critical.

2. SMT chip processing must fully comply with the above evaluation standards of welding technology. When welding, common welding and manual welding and other related measures are usually used, while those required for SMT chip processing For welding technology and standards, you can refer to the welding technology evaluation manual. Of course, some high-tech SMT patch processing plants also carry out 3D construction of the products that need to be processed, so that the effect after processing will reach the standard, and its appearance will be more perfect.

3. Cleaning measures are followed by SMT patch processing and welding technology. When cleaning, it is necessary to strictly follow the standards, otherwise the safety after SMT patch processing cannot be guaranteed. Therefore, the type and nature of the cleaning agent are required when cleaning, and the integrity and safety of the equipment and process need to be considered during the cleaning process.

Improve the quality of SMT patch processing

1. Selection of enterprise technical personnel

Establish a network of total quality (TQC) institutions within the enterprise, and make timely and accurate quality feedback to select the best quality inspectors of the production line, and the administration is still under the management of the quality department, so as to avoid other factors from interfering with the quality judgment work .

2. Ensure the accuracy of inspection and maintenance equipment

Product inspection and maintenance are carried out through necessary equipment and instruments, such as multimeters, anti-static wrists, soldering irons, ICT, and so on. Therefore, the quality of the instrument itself will directly affect the production quality. It is necessary to send inspection and measurement in time according to the regulations to ensure the reliability of the instrument. Allide offline AOI tester, X-RAY tester, LCR bridge tester, 60 times digital electron microscope and other high-precision testing equipment to ensure the quality of each product Up to standard.

3. Setting of quality process control points

In order to ensure the normal progress of SMT processing, the quality inspection of each process must be strengthened to monitor its operating status. Therefore, it is particularly important to set up quality control points after some key processes, so that quality problems in the previous process can be found and corrected in time to prevent unqualified products from entering the next process.

4. Formulate rules and regulations related to quality

The Quality Department shall formulate necessary quality-related rules and regulations and the department’s work responsibility system to restrict man-made avoidable quality accidents through laws and regulations, with clear rewards and penalties, and participation in quality assessment by economic means. The SMT company has set up monthly quality awards.