Editorial Team - PCB Directory
Jan 11, 2021
A Cold Solder Joint occurs when solder fails to melt entirely to form a proper joint. A cold solder joint or an improperly formed joint can be the trigger for reliability problems of an electronic assembly. Cold solder joints increase the electrical resistance of the solder joints, and hence reduce the reliability of the solder joints.
There are a number of factors that can cause cold solder joints. These include:
Cold solder joints can be detected by visual checking or using a magnifying glass. Primarily, a cold solder joint could look dull, whitish, and convex, or deformed, which is very different from a proper solder joint.
Another way to detect a cold solder joint is by using a Multimeter. Since one of the effects of a cold solder joint is an increase in resistance. A Multimeter can be used to test for this – It can be used to test for an increase in electrical resistance or test the continuity of the circuit.
However, the detection of cold solder joints gets more challenging when a lead-free soldering process is used. So it is best to try and avoid these cold solder joints from arising.
Here are a few things that you can do to avoid cold solder joints:
The cold solder joints can be detected by visual checking or using a magnifying glass. A cold solder joint usually looks dull, whitish, and convex, or deformed, which is very different from a proper solder joint.
This how different a Cold Solder joint looks from a proper solder joint.
Figure 1 - shows a properly soldered joint that is shining, bright, and concave in shape.
Figure 2 - Shows a Cold Solder joint that is dull looking, whitish, convex, and deformed in shape.
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