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Opens at DIP

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Description:
Open at two DIP leads for THT. It is clearly visible where solder is lacking at the holes and around the leads.

Causes/Remedy:
  • poor wettability of leads
  • residues/contamination in the holes
  • poor metallic structure in the holes (tinning)
  • unsuited layout for the wave soldering direction

Source: visual, optical inspection - general view
Opens at two pins

Description:
Opens and poor solder fillets at a DIP. Same context as described above.

Causes/Remedy:
  • poor wettability of leads
  • residues/contamination in the holes
  • poor metallic structure in the holes (tinning)
  • unsuited layout for the wave soldering direction

Source: visual, optical inspection - general view
Open at a DIP
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