In the SMT production process, how should solder paste be selected

SMTSolder paste soldering, as the mainstream surface mount technology (SMT) production process at present, the selection of solder materials during the production process is of Paramount importance. A suitable oneSolder pasteToday, Shenzhen JJY can enhance product quality, reduce damage and cut production costsSolder paste manufacturerLet's take a look togetherSMTIn the production process, how should solder paste be selected?

Selection principle

Due to the wide variety of solder pastes, we need to make a choice based on the requirements of our own products, the process flow and the cleaning method. The general selection principles are as follows:

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 solder paste andPCBThe compatibility of pre-coated flux and its adaptability to the foaming process. For consumer electronic products, low-solid-content and medium-solid-content rosin-type fluxes selected can also achieve the purpose of no need for cleaning after soldering. However, when choosing the type, it should be noted that the flux may get dampSIRWhether the requirements are met.

2If electronic products need to be cleaned after soldering, the solder paste should be selected according to the cleaning process. If the water-washing method 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. EspeciallyPCBThe preheating temperature is the primary condition to ensure the realization of the solder paste's function.

5For the foaming process, the welding function and density of the welding machine should be frequently tested. For those with excessive acid value and high water content, new solder paste should be replaced.

The above is all aboutSMTDuring the production process, all the information on how to select solder paste is provided. For more solder-related information, you can search for "Shenzhen JJY" to view. We will update the information regularly. If you have any related needs, please feel free to contact us and we will serve you wholeheartedly.