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May 2013

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From:
Douglas Pauls <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Fri, 17 May 2013 06:44:59 -0500
Content-Type:
text/plain
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text/plain (111 lines)
You are welcome Lee.  You might also consider UV curable masking 
materials.  I am evaluating one from Dymax right now.  Does not seem to 
leave harmful residues, but not sure how well it works in production yet.

Doug Pauls



From:   Lee Hitchens <[log in to unmask]>
To:     TechNet E-Mail Forum <[log in to unmask]>, 
[log in to unmask]
Date:   05/17/2013 03:09 AM
Subject:        Re: [TN] Masking of conformal coating



Thanks Doug

We will check this out. We are going to trial a few other things and see 
what is the best result.

Best Regards

Lee Hitchens
Technical Director
SCH Technologies is a Division of SCH Services Limited
Mob: +44 (0) 7862 25 33 21 www.conformalcoating.co.uk

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On 16/05/2013 15:32, Douglas Pauls wrote:
> Lee,
> We use the green polyester tape dots and squares from Shercon and they
> work well.  You might also consider Seal and Peel from Interflux in 
Texas.
>   This is a hot melt masking agent, comes up easy, leaves no residues. 
We
> use it for Parylene masking.  Pretty good stuff.
>
> Doug Pauls
>
>
>
> From:   Lee Hitchens <[log in to unmask]>
> To:     <[log in to unmask]>
> Date:   05/16/2013 02:08 AM
> Subject:        [TN] Masking of conformal coating
> Sent by:        TechNet <[log in to unmask]>
>
>
>
> I am looking for help on what people think is a good masking tape / dot
> for conformal coating processing. Right now our services around the
> world are really struggling to find a suitable tape that does everything
> they want. They did have a great tape from a well known company but
> production problems has meant it has been withdrawn. The wish list for
> our operators is
>
> 1. Sticks well enough not to lift with too much time (avoids bleed under
> the tape)
> 2. Doesn't stick too much so the component is ripped off with the 
masking
> 3. Doesn't leave a residue when removed (we wont apply heat to the tape
> so can ignore that)
> 4. Dont need to buy 5 years stock of each different size due to crazy
> min order needs
> 5. Prefer not to have a backing tape as a real pain
> 6. I would like to say ESD friendly but all the tapes we have tried that
> are ESD are awful. But we will see?
> 7. Plastic (polyamide or something) tape and not paper. Paper lies too
> thick on the surface and causes de-masking issues if coating is applied
> to the correct thickness.
>
> We can compromise since I know this is what will happen but what do
> operators use out there and find a good solution?
>





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