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Cold solder joints at passives

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Description:
The cracks in the solder joint parallel to the lead cannot be detected from outside easily. The microsection reveals this defect. In many cases microcracks form around the hem of the solder joint which can be detected from outside.

Causes/Remedy:
  • mechanical load or damage to the solder joint
  • overlong leads were cut off after soldering - mechanical load
  • thermal stress to solder joint through extreme temperature changes caused defect

Source: Microsection
Cracks in solder joint
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