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Alignment deficiencies at SO

more examples

Description:
Alignment fault of a SO after reflow soldering. This overhang is non-conforming for any of the classes in accordance with IEC 61191-2.

Causes/Remedy:
  • placing faults: teaching, tolerances, systematic faults
  • floating of components during reflow process
  • vibration during soldering


Source: SEM
Alignment fault of a SO

Description:
Unacceptable alignment fault. The leads on the left side overlap the pads to an unacceptably low extent. Moreover there is no solder fillet at the heels. Rework necessary in any case.

Causes/Remedy:
  • placing faults: teaching, tolerances, systematic faults
  • floating of components during reflow process
  • vibration during soldering


Source: SEM
Alignment fault of a SO

Description:
Combination of faulty alignment in both directions, lengthwise and sideways. Non-conforming. Rework necessary.

Causes/Remedy:
  • placing faults: teaching, tolerances, systematic faults
  • floating of components during reflow process
  • vibration during soldering


Source: visual, optical inspection - general view
Faulty alignment of a SO
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