Generally speaking, the brightness of solder joints is only an appearance factor. During solder paste surface mount processing and soldering, whether the solder joints are bright or not is also a relatively important parameter. The brightness of the solder joints affects the appearance quality of the product. Nowadays, many product users have certain requirements for the appearance of the product. Therefore, when we are soldering solder paste patches, we should pay attention to the brightness of the solder joints. However, during the solder paste surface mount processing and soldering, it cannot be guaranteed that the brightness of every solder joint meets the requirements. So, what factors will have an impactSolder pasteInsufficient brightness of the solder joints during material replenishment? Now, let's take a look at it with the help of the solder paste manufacturer's editor:

Let's start with several factors that affect the brightness of solder joints for analysis:

1When there is a deviation in the tin content of the tin wire, the brightness will be affected. However, under normal circumstances,5℃The tin content within can be distinguished. The lower the tin content, the dimmer the brightness of the solder joint. When the impurity content deviates significantly, it also has a relatively obvious impact on the brightness of the solder joint, such as copper, silver, bismuth, etc.

2Temperature also has an impact on the brightness of the solder joints. To ensure that the solder joints exhibit the best luster, the temperature must reach a certain level. Insufficient temperature will cause the surface gloss to decrease and become rough. Experiments prove that one is needed20wThe soldering iron and60wWhen soldering the same type of tin wire with a soldering iron, the brightness varies.

3The brightness of solder wires of the same degree varies depending on the type of flux used, as a certain substance in the active agent has an impact on the brightness of the solder joint. The active agents used in our factory come in both glossy and matte types, and are produced according to the requirements of customers.

Ii. Issues with Welding Materials:

1Tin-lead alloy Solder paste The welding point It will be better than lead-free solder paste More Bright Some Lead-free solder paste The welding point Surface Will make comparisons Rough If Must Use Lead-free solder paste Replaceable It contains silver Lead-free solder paste It is also possible. Effective The improvement Solder joint Brightness of light ;

2The solder paste contains silver active agents Everyone has different requirements for the brightness of the solder joints Most people welcome bright solder joints However, some people think that brightness is actually not conducive to visual inspection Therefore, some solder pastes use matting agents . 

3, The oxidation degree of the solder paste is too high. After opening the bottle of solder paste, it is best to24Use up within hours. When storing, it needs to be kept3-5℃In such an environment.

The above is what the editor has explained to you aboutSolder pasteinSMTHere are some details about the issues that may arise if the solder joints are not shiny during the patching process. I hope this can be of help to everyoneTo solve this matter, if you want to know more about solder paste, solder paste, low-temperature solder paste, solder wire, and solder bar, you are welcome to consult Shenzhen JJY Industrial TechnologyLimited company, let's all learn and grow together!