Lvzhidao solder company has collected several questions about the use of solder paste for you to answer.
Kaifeng's solder paste
1. If the storage temperature of solder paste is too high, will it affect the use of solder paste?
Too high temperature storage will lead to solder paste viscosity decline, which will directly affect the quality of solder paste printing.
2. What will happen if the temperature of solder paste storage environment is too low?
If the temperature is too low to store, the flux in solder paste will be affected. There is an adhesive in the flux. When the temperature of the adhesive is lower than 2 ℃, crystallization will occur, which will destroy the molecular structure. When the solder paste is heated before use, the performance of the solder paste will inevitably suffer a certain degree of loss.
3. What storage should be paid attention to during the use of solder paste?
When the solder paste is not in use, it needs to cover the cover and put it back into the refrigerator in time; the sealed solder paste should be used up in a short time as far as possible, and it can't be mixed with the unused solder paste to avoid confusion. When it is used again, it needs to be warmed again.
4. What are the causes of solder paste false soldering?
Find out whether the temperature and humidity of the solder paste storage environment meet the standard, and whether the tin brushing process meets the standard. If they do not meet the standard, you can find the engineer of your unit to solve the problem.
Check whether the storage environment, temperature and humidity of solder paste meet the storage standard of solder paste. Whether the printing quality of solder paste is qualified. If there are no problems, we need to communicate with the solder paste supplier.
5. What to do after the position of solder paste is misplaced?
The problem with misprinting is that the steel plate is not installed in the correct position. Or in the printing process, improper operation, resulting in solder paste deviation.
Solution: if the printing dislocation is found in advance, the solder paste on the printed wrong PCB board needs to be removed, and then the steel plate needs to be readjusted and re printed.
6. How to solve the problem of too much solder paste?
The main reason for too much is that the size of the template is not adjusted, resulting in the size is too large; if the distance between the steel plate and PCB is too large, the bridge connection will be caused if the distance between them is too large.
Solution: before working, check the size of the window, and adjust it if it is too large; set the parameter of the distance between PCB and steel plate; clean the template.
Dongguan lvzhidao Metal Co., Ltd. [lvzhidao solder factory] has a complete production system, producing and selling solder paste, lead-free solder paste and other products. For more details, please visit the official website of Lvzhi Island: www.dglzd.com