Or, you could vacuum pack them with silica! (this is what we do)

-----Original Message-----
From: Haugaard Svend [mailto:[log in to unmask]]
Sent: Wednesday,June 17,1998 5:11 AM
To: [log in to unmask]
Subject: [TN] Moisture sensitive SMD-ICs


How to store moisture sensitive SMD-ICs in a decent and economic way ?

On delivery some SMD-IC's are packed carefully in drypacks with silica
gel and humidity indicator card. The supplier states that the parts
after unpacking have to be used in a more or less rapid way - sometimes
even within hours.
However, the problem shows when not all parts are used at once so some
of them have to be stored for a while.
The supplier states that the problem can be overcome by baking the parts
prior to reflow soldering. But baking takes time and may damage the
solderability.

So I would prefer to store the unpacked not-yet-to-use parts in a
moisture controlled environment.
We look at nitrogen storage - knowing the costs of implementing and
running the thing. Is there a way to keep the nitrogen usage at a low
level ?

Or should we go for some form of "dry air environment" ? ... Who builds
such things ? ... At what costs ?

Or perhaps we could store parts in reusable dryboxes ?


Best regards
Svend

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