Phil

We have had a similar problem with a potting material wicking up into DB9
connectors.  We ended up having to apply RTV to the interface of the pins
and connector body prior to connector installation.  It was thick enough not
wick inside and contaminate  the pins.  It also sealed the part preventing
the potting from wicking in.  This took some testing to find the right
material for the job but it was well worth it.  Perhaps there is a material
that is compatible with your process that will accomplish this.

Regards,
Martin Butcher

-----Original Message-----
From: Crepeau, Phil (Space Technology) [mailto:[log in to unmask]]
Sent: Wednesday, April 05, 2006 1:42 PM
To: [log in to unmask]
Subject: [TN] conformal coat masking


hi,

we are using several qss-050-01-l-d samtec surface mount connectors on a
printed wiring assembly that is conformal coated with a choice of either
an ar or a pur material.  the connector pin/header interface is not
sealed, so the conformal coating that must go under this connector has
an easy path to wick up the leads and contaminate the mating surfaces of
the connector.  what to do?

thanks,

phil

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