What to pay attention to SMT patch welding

SMT patch processing is the most electronic factory will be used in the placement technology, with high assembly density, light weight and other advantages, which can meet the requirements of miniaturization of electronic.And welding is a very important part in the processing of SMT patch, we need to understand the attention of its welding in order to avoid mistakes. What we should pay attention to SMT patch welding, here Wonderful PCB will give your the answer.

1. Temperature of the soldering iron head

In SMT welding due to the different temperature of the soldering iron head, the put in Rosin block will produce different phenomena.

Therefore, we must make it in the appropriate temperature, usually in Rosin melting faster and do not smoke when the temperature is the most appropriate.

2. SMT patch welding time
SMT welding time should be as far as possible to control the precise point, the general requirements from the heating point of welding to solder melting and welding points should be completed within a few seconds. In order to avoid a long time, the welding flux on evaporate completely, eventually lose their role to help, or because the time is too short, so that the temperature of the welding point is not up to the welding temperature.

3. The amount of solder and flux

Solder and flux are indispensable materials welding, reasonable selection of the solder and flux, is an important link to ensure the welding quality. For the usage of the solder and flux to control, too much will cause the solder joint coarse even next to the circuit and take the tin short circuit, may also in the process of mobile electric soldering iron solder drop caused by other parts of the short circuit; if too small, it can't cover the solder joint, the influence of welding firmness.

In the SMT welding process, we should also need to be careful not to touch welding point, especially in the welding point of the solders have not solidified completely and can not be freely moved welding of welded device and wire, otherwise, will point welding deformation,weld phenomenon, the influence of welding effect. Learn more about What is SMT technology here