We have used MEK to take multi-layer PWBs apart for reverse engineering
purposes. It isn't very fast but it is effective. We have not studied how
much time it takes before the board begins to delaminate. Room temperature
the solvent is not very effective. Heating improves performance . . . which
would be a bad thing from your perspective.

> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of KIPPING, Michael
> (York Rd)
> Sent: Friday, March 22, 2002 4:37 AM
> To: [log in to unmask]
> Subject: [TN] PCB exposure to solvents
>
>
> Hi there
>
> We conformally coat our PCB assemblies using an acrylic and use
> Methyl Ethyl
> Ketone to strip assemblies if they require rework.
> Has anyone carried out any work on the maximum exposure time you
> can expose
> PCBs to solvents?  (I realise that it will depend on the laminate
> materials,
> component constuction etc.)
>
> Thanks
>
> Michael Kipping

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