What are the reasons for insufficient gloss of solder joints in SMT assembly?

inSMTIn the production and processing of surface mount technology (SMT), there are some orders that have requirements for the glossiness of the solder jointsSMTThere are also many factors that affect the gloss of solder joints during the surface mount technology (SMT) processing. The following is JJYSolder paste manufacturerLet me briefly introduce to you the common reasons for insufficient gloss of solder joints:

1There is oxidation in the tin powder in the solder paste.

2The additives in the flux have a matting effect.

3InSMTDuring the surface mount technology (SMT) processing, the preheating temperature of reflow soldering is relatively low, which leads to insufficient residual evaporation and thus insufficient glossiness of the solder joint appearance.

4After the welding is completed, there are residues such as rosin or resin on the solder joints. The reasonable use of rosin solder paste and no-clean flux can make the solder joints brighter, but the residues will affect the gloss of the solder joints, especially for larger onesICFeet.

5There is a need for solder joint gloss requirementsSMTBefore the surface mount technology (SMT) processing begins, make a note. Different processes and solder paste raw materials, etc., will all affect the gloss of the solder joints.

Shenzhen JJY Industrial Technology Co., Ltd. is mainly engaged in the production and operationSMTSolder paste manufacturers of solder paste, syringe solder paste, etc.