How to choose solder paste during SMT assembly?

There are usually many devices in the production site of a factory, and the equipment used in the production line also has a very high level of safety. Is that enough? This is definitely not enough. We must learn traditional safety knowledge and cannot ignore them. Next, the solder paste manufacturer will briefly explainSMTDuring surface mount technology (SMT) processingSolder pasteHow to choose:

How to choose:

Due to the wide variety of solder types, we need to make a choice based on the requirements of our own products, the process flow and the cleaning method. Generally, how should we make a choice?

1For electronic products that do not plan to undergo a cleaning process after soldering, no-cleaning solder paste should be the first choice. It has the feature of low residue, but when selecting the model, attention should be paid to the compatibility of solder paste and pre-coated flux, as well as its adaptability to the foaming process.

2If electronic products need to be cleaned after soldering, the solder paste should be selected according to the cleaning process. For instance, if water washing is adopted, water-soluble solder paste can be selected. If organic ammonia saponification agents are used, for those that need to be cleanedPCBThe plates are welded.

3If it is to be selectedvocFor no-clean solder paste, attention should be paid to its compatibility with the equipment, such as the corrosion resistance of the equipment itself and whether the preheating temperature is suitable. Generally, it is required to increase the temperature appropriately, as well asPCBWhether the base material is suitable, for instance, some base materials have high water absorption and are prone to bubble defects.

4No matter which type of solder paste is selected, attention should be paid to the quality of the solder paste itself and the adaptability of the soldering machine, especiallyPCBPreheating temperature is the primary condition to ensure the realization of the function of solder paste.

5For the foaming process, the welding function and density of the welding machine should be frequently tested. If the acid value exceeds the standard or the water content is too large, new solder paste should be replaced.

The above content is shared by Shenzhen JJY Industrial Technology Co., Ltd. for you. We hope it will be helpful to you. If you want to know more about solder paste andSMTKnowledge of surface mount technology (SMT) processing. Welcome to leave a message and interact with us!