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Subject:	Re: Routing conformal coatings
From:	"Vaughan, Ralph H" <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Mon, 14 Sep 1998 04:24:12 -0700
Content-Type:	text/plain
Parts/Attachments:	text/plain (54 lines)

Can he not have the boards pre-routed except for tabs to the panel, then
mask the tabs before coating?  Sounds too simple...you guys probably already
thunk of that.

Ralph Vaughan

> ----------
> From:         Graham Naisbitt[SMTP:[log in to unmask]]
> Reply To:     TechNet E-Mail Forum.;Graham Naisbitt
> Sent:         Friday, September 11, 1998 11:11 AM
> To:   [log in to unmask]
> Subject:      [TN] Routing conformal coatings
> 
> Hi TechNetters,
>  
> I hope you can help. We have a customer who needs to route (de-panellise)
> his assemblies after Conformal coating. The coating is an acrylic.
>  
> The problem is that when he does this routing operation, the coating (not
> surprisingly) goes into a state of partial melt so that the coating is
> stringing on the underside making a problem for clean-up which is costly.
>  
> He cannot route from the other side. He has tried chilling the assembly
> but this is impractical because of the time constraints. He cannot
> selectively NOT coat the affected area because his selective coating
> system then takes too long for the operation.
>  
> Does anyone have any suggestions? 
>  
> Regards, Graham Naisbitt
>  
> [log in to unmask]
>  
> Concoat Ltd             Phone: +44 1276 691100
> Alasan House          Fax:      +44 1276 691227
> Albany Park
> CAMBERLEY 
> GU15 2PL UK
>  
> Any opinions expressed are those of this employer.
> 

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