Phil:
           The reason the wicking up is the low viscosity of the
coating. Mask the connector when the board is being spray coated. Remove
the mask and brush coat the connectors with coating straight from the
can. Better choice, make sure the coating is at least 30 seconds plus on
the # 2 Zhan cup. Do some testing first to confirm your specific
product. 30 seconds or more will make the coating too thick to wick up
the pins of the connectors
        Regards,
        Ramon



> ----- Original Message -----
> From: "Crepeau, Phil (Space Technology)" <[log in to unmask]>
> To: [log in to unmask]
> Subject: [TN] conformal coat masking
> Date:         Wed, 5 Apr 2006 13:41:40 -0700
>
>
> 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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