Howard

When switching over to T/R for Moisture Sensitive Parts (particularily
Level 4+) you need to keep in mind your usage QTY's.  If small volumes are
being used then T/R may not be the way to go (regardless of what the buyers
say).  The cost savings could easily be lost by the time/labour used to
bake/reseal leftover parts.

J-STD-033A states that after 1hr exposure, left over parts will need to be
resealed or baked to stop further moisture migration and to reset the floor
life clock. Look at section 4.1.xx of the J-STD (reseal times with fresh
dessicant is 5x's the exposure time(12hr max) for level 2-4 and 10X the
exposure (8hr max)for level 5-5A) or bake .

Andre Leclair
Process Engineer
Ansen Corp.

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