On 12/8/02 3:00 pm, "David Hannick" <[log in to unmask]> wrote:

> Hi
>
> I am an engineer working for a company that designs smoke alarms. We have a
> problem with insect infestation in some markets such as Australia which leds
> to circuit board damage through shorts etc. The enclosure has to have
> openings to allow smoke and air to flow in to the unit, but insects get in
> through these. Are our options limited to conformal coatings and insect
> screens to cure the problem. Are there other options? Has anyone else
> experience of similar problems.
> Thank you for your help.
>
> Best Regards
> David Hannick
>
> Ei Electronics
> Shannon
> Co. Clare
> Ireland.

David,

The conformal coating is probably the best solution, and this is a problem
that others have faced.

Keep-in-mind that if the insects in question are ants for example, they
excrete formic acid...which is kinda corrosive!

Best solution we found was to coat with a UR coating.

Regards Graham

[log in to unmask]

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