As we all know, SMT soldering is one of the important links in the assembly process of electronic products. If there is no corresponding SMT welding process quality assurance, any well-designed electronic device will be difficult to achieve the design index. Therefore, the solder joints must be strictly inspected during soldering to avoid the occurrence of unqualified solder joints quality problems leading to unqualified electronic products. Let's take a look at the various SMT soldering problems in the following Sanjing.

After the SMT welding operation is over, in order to make the product have reliable performance, the welding quality must be inspected. Welding inspection is generally a visual inspection, not just to inspect the solder joints, but also to check the conditions around the solder joints. For example: due to a series of problems caused by welding, the inspection of the wiring and welding of the terminal is to check from the welding state, ①check whether the insulation sheath of the wire used is damaged, and whether the terminal has any scars; ②the degree of bending of the hooked wire hook And the tightness and whether there are dirty spots in each part, etc.

Many of the performance damages of electronic components found in electrical performance inspections are caused by poor soldering. Welding of electronic products is mainly used for electrical connection. If there is a defect in the electrical connection of a product, it must be repaired to eliminate the defect.

Welding defects include electrical connection defects and appearance defects without electrical connection defects. Why treat products with defective appearance but no electrical connection defects as products with welding defects? Because products with such defects are affected by environmental conditions, electrical failure is extremely harmful, and it is a hidden danger of electrical failure. For the solder joint defects that have the connection function during appearance inspection, but will be affected by the use environmental conditions in the future, the connection function may be lost, and this type of solder joint defect should also be treated as a defect.

The above is about the content of SMT welding inspection and the influence of defects, I hope it can be helpful to everyone!