Mark:
        Perhaps your customer  wants to make sure that the sensitive
components are glued to the board when it is cleaned and this way get better
adhesion. Some one correct me if I am wrong. I have always thought that CC
is done as the last step prior to shipping,. with a few exceptions.
        Regards,
        Ramon


> -----Original Message-----
> From: Mark Charlton [SMTP:[log in to unmask]]
> Sent: Monday, February 23, 2004 1:09 PM
> To:   [log in to unmask]
> Subject:      [TN] Conformal coat over RTV?
>
> My learned and esteemed colleagues,
>
> One of our customers has requested that we conformal coat over a DOW 3145
> RTV adhesive used to stake some sensitive components.  The specified
coating
> material is MS470-N, a urethane product.
>
> Is this a standard practice (to coat over RTV)?  We have always conformal
> coated the PCA and then staked the components using the RTV.  Our CC
vendor
> isn't too pleased with this request.
>
> Mark Charlton
>
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