【 JJY 】 What factors affect the gloss of reflow solder joints?

Reflow soldering technology is heresmtThe field of surface mount technology (SMT) processing is no stranger. The components on various boards used in our computers are all soldered onto the circuit board through this process. There is a heating circuit inside that heats air or nitrogen to a sufficiently high temperature and then blows it onto the already attached circuit board, causing the solder on both sides of the component to melt and bond with the main board. The following is JJYSolder paste manufacturerI will take you to have a look:

The main factors affecting the glossiness of reflow solder joints

1The composition of solder paste is different, which will affect the gloss of the solder joints. For example, the solder joints presented are different when the solder paste contains silver and when it does not.

2Whether the tin powder in the solder paste is oxidized or not will cause differences in the gloss of the solder joints.

3Whether there are any additives in the flux itself in the solder paste that form a matting effect;

4During the reflow soldering process, if the reflow soldering temperature is insufficient or too high, causing the flux to evaporate prematurely, it will directly affect the gloss of the solder joint.

5In reflow soldering, the preheating temperature of reflow soldering is relatively low, and there may be substances that are difficult to evaporate remaining on the surface of the solder pad, which will affect the gloss of the reflow solder joint

6After reflow soldering, whether there is rosin or other impurities remaining on the surface of the solder joint is a common phenomenon, which will affect the gloss of the solder joint.

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