Dear Technetters,

We've just finished our first few boards with Humiseal 1B31 conformal
coating, applied with a selective spraycoating machine, and we asked the
customer to inspect the products.
He commented that some areas on top of the IC's were not covered
completely, which is required (so he says) because these are plastic
components which may absorb moisture if left uncovered.

I'm not gonne argue about this with the customer, but still I'm
interested to hear from you wether the fact that the IC's are plastic is
indeed a reason to require them to be completely covered with coating.
As far as my knowledge goes the problem with plastic IC's and moisture
is limited to the soldering process only, but I may be wrong.....
Anyone can comment ?

Daan Terstegge
Unclassified mail
Personal Website: http://www.smtinfo.net

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