Electronics Forum | Mon Jul 18 12:25:30 EDT 2016 | oleksz
Some people involved in PCB assembly process claim that SMD components reflow soldering problems are often caused by traces running under a component. According to this claim, trace (or any copper) covered by solder mask and placed under SMD componen
Electronics Forum | Tue Nov 22 17:06:33 EST 2005 | mdemos1
I am looking for a tool to measure copper thickness on finished circuit boards. I saw one of these once being used for incoming inspection. Can someone point me to where I can find such a tool? Thanks, Mike.
Electronics Forum | Thu Oct 30 23:39:10 EDT 2014 | beilimanu
No paper thing, while I can make some suggestions based on my experience. what is the size of your via? If it's smaller than dia0.4mm, in PCB production process it should be filled by soldermask. So my suggestion is design it to be full filled by SM
Electronics Forum | Tue Apr 23 15:35:45 EDT 2013 | dyoungquist
Check out IPC-A-600. Revision G (July 2004) section 3.2.3 (surface) and section 3.2.4 (internal) give min/max thicknesses for various weight copper. The min also changes depending on what class (1-3) standard you are working to.
Electronics Forum | Mon Aug 30 10:39:08 EDT 2010 | jamesc09
Is there any way to measure the copper oxide thickness on the inner layers of a PCB? I have been asked to investigate this and am not sure if it is possible. If it is, please tell me by what method, any contract labs that can do it, or the name of
Electronics Forum | Mon Apr 18 12:39:57 EDT 2022 | winston_one
Thanks for all comments. Process was adjusted normally, problem was in PCBs. Microsection of bare boards confirm that the copper thickness in troughholes was unsuffient, sometimes below 10 microns, on soldered boards where there were a problems durin
Electronics Forum | Fri Aug 22 14:24:54 EDT 2008 | boardhouse
Paul, I would do two things, eval whole lot for any etching issues as shown above and scrap and two I would have your copper thickness checked, my guess your copper plating will be low. Check plating thickness in Via holes - if less then 8/10th's r
Electronics Forum | Wed Sep 09 08:25:40 EDT 2009 | davef
We understand that you have boards in production that you need to ship. In the future, you could eliminate your moisture caused blow hole issue a lot more simply than baking. Consider requiring that your board fab plate the copper thickness of throug
Electronics Forum | Tue Apr 23 15:18:02 EDT 2013 | davef
2 oz copper should be 2 oz per ft^2 thick. There is no relationship between thickness and copper weight due to the effect of processing. Since this is a painful way of thinking about things, ppl have reached a compromise and talk about 'nominal thick
Electronics Forum | Tue Jan 02 14:15:59 EST 2007 | realchunks
I have a new customer that has a print calling for 2oz. copper finish for top and bottom layers, and 1oz. copper finish for the inner 6 layers. Now, they also have a stack up depicting each layer and thickness. It shows the outer layers of copper b
