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February 2018

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Subject:
Re: IPC-CC-830 (Conformal Coat)
From:
"lduso - Diamond-MT.com" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, lduso - Diamond-MT.com
Date:
Thu, 8 Feb 2018 10:45:51 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (52 lines) 
Gels are an option but it is very easy to exceed J-STD thickness when using
them. Better to seal a connector first with an RTV, if allowed, designed to
be used that thick. We generally mask conservatively and do not coat the
leads at all or, if absolutely required by the customer, go back and touch
them up by hand so they do not get flooded.

Lloyd Duso
Plant Manager
Diamond-MT
(814) 535-3505
www.Diamond-mt.com

On Thu, Feb 8, 2018 at 9:42 AM, Richard Kraszewski <
[log in to unmask]> wrote:

> Agreed and excellent point about the gelled coating.
> Works well if allowed to use.
>
> Rich  Kraszewski
> Senior Staff Process Engineer
> Plexus Engineering Solutions
>
>
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> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Wayne Showers
> Sent: Thursday, February 08, 2018 8:11 AM
> To: [log in to unmask]
> Subject: Re: [TN] IPC-CC-830 (Conformal Coat)
>
> I have had some success using Conformal coating gel.  One example is 1A33
> Gel.  Be advised that it is expensive, nor does not come in user friendly
> packaging.
> More often, if you customer will abide by it, is the application of a
> viscous adhesive such as Hysol 0151.  This also can serve as a
> hold-down/part reinforcement.
> If you are NADCAP, please be advised, that until they make a correction,
> the use of Silicon backed masking dots is actually a violation of the
> standard.
>

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