Packaging and assembly

For surface-mount packages, which moisture-related rating specifies, among other things, how long they may be left after opening the moisture-proof packing before reflow?

  1. AMSL (moisture sensitivity level)
  2. BFIT
  3. CCpk
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Answer: A. MSL (moisture sensitivity level)

MSL (Moisture Sensitivity Level) rates packages by how readily they absorb moisture and indicates, for example, how long they may be left in the factory environment after opening. If that time is exceeded, they are baked before reflow to drive out moisture and prevent the popcorn effect and similar problems.

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