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 Dec 11 13:00:07 EST 2019 | slthomas
Excessive mask thickness also can wreak havoc on stencil printing.
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 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 | 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 09:18:19 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 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 | Sun Aug 15 05:45:15 EDT 1999 | Brian
Boca, Dave Sorry, but I cannot let this go. I'll go along with you that, at the time that the Montreal Protocol was initially signed (September 1987), there was no scientific proof that CFCs etc. were causing ozone depletion. There was, however, ve
