How to avoid false soldering in SMT assembly?

inSMTDuring the surface mount technology (SMT) processing, due to various factors, there are some quality issues with the products, such as false soldering. This not only leads to unstable product performance but also affects subsequent processesICTandFTTests revealed that this led to problematic products flowing into the market, ultimately damaging the company's brand and reputation. So how can we avoid problems like false soldering? Let's take a look at JJYSolder paste manufacturerLet me share it with you all.

I. Judgment Method:

1The inspection is carried out by using dedicated equipment for online detectors.

2Visual orAOIInspection. When discoveredSMTThe solder joints of the patch have too little solder or poor solder wetting, or there are gaps in the middle of the solder joints, or the surface of the solder is spherical, or the solder andSMDWhen not going on blind dates, one should pay attention. Even minor phenomena can pose hidden dangers, so it is necessary to immediately determine whether there is a batch virtual welding problem.

Ii. Solution:

1If the printed solder paste on the circuit board is scratched or rubbed, the amount of solder paste on the pads will decrease, resulting in insufficient solder. It should be replenished in time.

2The through hole of the pad isPCBOne major flaw of the design is that through holes can cause solder loss, resulting in insufficient solder. The pad spacing and area also need to be standardly matched; otherwise, the design should be corrected as soon as possible.

3,SMTWhen oxidation occurs on the circuit board during the surface mount technology (SMT) process, the oxide layer needs to be removed. If the circuit board gets damp and there is any suspicion, it can be dried in a drying oven. If the circuit board is contaminated with oil stains, sweat stains, etc., it should be cleaned thoroughly with anhydrous ethanol at this time.

Shenzhen JJY Industrial Technology Co., Ltd. mainly engages in the production and operation of:SMTSolder paste manufacturers of solder paste, syringe solder paste, lead-free solder wire, wave soldering bar, automatic soldering wire, etc.