Why do PCBA circuit boards sometimes need a dispensing process?
1. What is the dispensing process?
We search for the dispensing process, and we can see the explanation of the dispensing process on Baidu Encyclopedia: dispensing, is a process, also known as sizing, gluing, gluing, dispensing, etc., is the use of electronic glue, oil or Other liquids are smeared, potted, and dripped onto the product, so that the product can play the role of sticking, potting, insulating, fixing, and smoothing the surface. According to the explanation given by Baidu Encyclopedia, we can understand that the dispensing process is actually a process for protecting products.
2. Why do you need a dispensing process?
The dispensing process has two major functions: preventing solder joints from loosening and moisture-proof insulation. Most of the places where the dispensing process is required are located in the weak structure of the PCB, such as the chip. When the product falls and vibrates, the PCB will vibrate back and forth, and the vibration will be transmitted to the solder joint between the chip and the PCB, which will cause the solder joints to oscillate. cracked. At this time, dispensing does make the solder joints completely surrounded by glue, reducing the risk of cracking in the solder joints themselves. Of course, not all PCBAs will use the dispensing process, because its existence also brings some disadvantages, such as the complexity of the production process, and the difficulty of dismantling and repairing (it is difficult to remove the chip if it is stuck, and it needs to be removed first)
Shenzhen Baiqiancheng Electronics Co., Ltd. strictly controls the production process. For post-soldering, a dispensing process is used to fix the components to prevent them from falling off and to prevent moisture and insulation, which greatly improves the production quality.
