How to Solve the Problem of Tin Short Circuit After Wave Soldering

      In PCBA factory, wave soldering is a common PCBA technology used to connect electronic components to PCB. So why does the tin short circuit occur after wave soldering? This involves many reasons, let’s explore them one by one. Next, let us explain the reasons in detail:

 

1. Excessive soldering station temperature

The temperature control of the soldering station is like the heat of stewing soup, it cannot be too high. If you want to solve this problem, we need to control the temperature of the equipment and ensure it is within an appropriate range to prevent solder from overheating and causing tin short circuit problems. In addition, it is necessary to check whether the design of the soldering pad complies with the specifications to prevent tin short circuit due to excessive temperature.

 

 

2. Poor solder fluidity

If we want to solve this problem, we must choose the right solder and optimize the wave soldering parameters, such as adjusting the temperature of the soldering station, preheating time and solder waveform. This is all to improve the fluidity of the solder.

 

 

3. Inaccurate components of installation positions

The installation position of the components cannot be wrong. We need to optimize the layout of the components to ensure that each component stays where it should be to prevent tin short circuit, rather than being crowded into a pile.

 

 

4. Inaccurate pad surface treatment 

1) Choose appropriate surface treatment: Apply appropriate treatment to the pad, such as tin plating, nickel gold plating, etc., to improve the adhesion between the solder and the pad.

2) Avoid chemical pollution: Avoid the impact of chemical pollution on the pad surface and keep the pad surface clean.

 

 

5. Unstable wave soldering equipment

In addition to the above mentioned, sometimes unstable equipment can also cause trouble. At this time, the equipment needs to be maintained regularly to ensure that these machines do not suddenly have problems. In addition, the parameters of the equipment need to be corrected to ensure that the equipment can operate within the normal range.

 

 

6. Oily or oxidized Components or PCB

Oil contamination or oxidation on components or PCB is like haze and cannot be ignored. Before assembly, please be sure to remove any oil or oxidation and keep the surface clean.

 

 

7. Abnormal solder waveform

Solution: Adjust the solder waveform - optimize the shape and height of the solder waveform to ensure that the solder flows across the pad evenly and stably.

 

 

The above countermeasures are to deal with some common causes that may cause tin short circuit problems in wave soldering. In practical applications, multiple factors can be comprehensively considered according to the specific situation, and the problem of wave soldering tin short circuit can be effectively solved by appropriately adjusting technology parameters and equipment status.

 

 

SHENZHEN HOYOGO ELECTRONIC TECHNOLOGY CO., LTD. Is an international, professional and reliable PCBA manufacturer. We can provide customers with one-stop services from upstream electronic component procurement to PCB production and processing, SMT patching, PCBA testing, finished product assembly, etc. service. If you have related needs, you are welcome to send us your inquiries.

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