Electronics Forum | Wed Dec 11 13:00:07 EST 2019 | slthomas
Excessive mask thickness also can wreak havoc on stencil printing.
Electronics Forum | Wed Jul 06 06:17:11 EDT 2016 | pavel_murtishev
Dear members, Recently we have found that solder mask thickness variation could lead to solder balling under QFN packages for a high reliability device. Is there any industry proven method for solder mask thickness checking? Any equipment or any me
Electronics Forum | Wed Jul 06 09:18:19 EDT 2016 | pavel_murtishev
Hi Dave, Thank you for the input. We have completely checked the whole process and solder mask thickness is the only thing that might impact. I wonder whether you might know chemical solutions capable to dissolve solder mask? Regards, Pavel
Electronics Forum | Wed Dec 11 11:35:15 EST 2019 | dilogic
Just out of curiosity - what is the rationale behind specifying mask thicknes?
Electronics Forum | Tue Dec 10 13:35:34 EST 2019 | scotceltic
I am looking to see what people are using for a min-max range to supply your PCB fabricators regarding solder mask thickness. I saw some points in the archives but not too much regarding what people are providing as their spec ? Any help would be a
Electronics Forum | Wed Jul 06 09:07:28 EDT 2016 | davef
Hi Pavel IPC-6012 - Qualification and Performance Specification for Rigid Printed Boards, Paragraph: Solder Resist (Solder Mask) Requirements, Sub-paragraph: Solder Resist Thickness has words to the effect … * Solder mask thickness shall be accordi
Electronics Forum | Wed Jul 06 09:28:00 EDT 2016 | smtbroker
Hi Pavel here in Poland interflux sells a product C8 who can remowe the solder mask, no disolve. It is a high alcalin product with other stuff, you can ask to vsd@interflux.pl jean vadim
Electronics Forum | Wed Jul 06 16:08:17 EDT 2016 | davef
Circuit Technology Center “4 Techniques for Removing Solder Mask” [http://www.circuitrework.com/features/607.shtml]
Electronics Forum | Wed Dec 11 12:07:33 EST 2019 | scotceltic
Our company has a spec on their current PCB dwg to make sure the fab house meets a specific thickness (min-max). The current spec reads: 13.5um min - 38.5um max. I assume it is to keep the board house honest and to make sure there is no exposed co
Electronics Forum | Sat Oct 06 08:27:24 EDT 2001 | davef
Yes, some solder masks do not tent well, because the material is too thin. That�s the trade-off. Thin masks: * Conform well to [don't bleed onto] fine pitch features. * Tent vias poorly, requiring an additional "plugging" step. As you imply, if th
