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Date: | Wed, 27 Mar 2019 14:00:32 +0000 |
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Yes! https://www.accudynetest.com/adtpen.html
-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of Mary Davis
Sent: Tuesday, March 26, 2019 2:51 PM
To: [log in to unmask]
Subject: Re: [TN] [External] [TN] Conformal Coating & PCB Solder Resist Finish
Simple Accu dyne marking pens can be used to characterize the surface energy. Below 35 dyne/cm, adhesion is marginal to poor. Search the Technetium archives for "solder mask surface tension for conformal coating adhesion" 2014
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From: TechNet <[log in to unmask]> on behalf of Douglas Pauls <[log in to unmask]>
Sent: Tuesday, March 26, 2019 7:32:23 AM
To: [log in to unmask]
Subject: Re: [TN] [External] [TN] Conformal Coating & PCB Solder Resist Finish
Mark,
I would tend to agree that matte is better for that reason, but it can also be related to the surface energy of the mask.
*Douglas Pauls *| Principal Materials and Process Engr | Advanced Operations Engineering
*COLLINS AEROSPACE*
400 Collins Road NE, MS 108-101, Cedar Rapids, IA 52498 USA
*Tel:* +1 319 295 2109 | *Mobile: *+1 319 431 3773
[log in to unmask]
On Tue, Mar 26, 2019 at 8:55 AM Mark Austin <[log in to unmask]>
wrote:
> Hello
>
>
>
> Does anyone have any experience of applying conformal coatings to
> different PCB Solder Resist finishes? I am thinking that matt finish
> solder resist would promote better wetting of the conformal coating,
> and possibly better long-term adhesion.
>
>
>
> Best Regards
>
>
>
> Mark Austin
>
> Lead Engineer
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