Electronics Forum | Sat Dec 10 07:03:59 EST 2005 | mdemos1
Hi. I am trying to find out the minimum copper thickness I should see on a through hole barrel. The board has 1 ounce copper and the board thickness is 0.062". I am finding thicknesses of 0.6 to 1.2 mils. Thanks, Mike.
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 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 | Sat Dec 10 07:33:09 EST 2005 | davef
Most board fabricators define a range of processes parameters that are routine for their plant set-up and methods. Look here http://www.divsys.com/ServicesProducts/PCB/MfgCapabilities.asp for an example. If you don't define your requirements, you'
Electronics Forum | Thu Feb 23 13:56:21 EST 2006 | slthomas
I have dealt with it before and usually it's consistent, so you use some simple math to work around the issues. Now, if you have so much variability between different locations on your board for resist thickness, HASL thickness, etc., that it fouls
Electronics Forum | Thu Feb 23 09:59:09 EST 2006 | SIR
We have an AUREL CS1222 machine to measure the thickness of the solder paste deposited on a bare board by a stencil printer. This device has a laser beam that has to be put on the pad where you want to measure the solder paste thickness. The measure
Electronics Forum | Sat Sep 01 18:14:39 EDT 2001 | Dreamsniper
your glue volume measurement is dictated by your stencil aperture size and thickness when you use stencil printing. Why you need to measure your glue volume deposition? I don't think that this is the right way yet for your undefined problem. What's t
