Electronics Forum | Tue Nov 03 06:23:12 EST 2009 | josh_brubaker
Has anyone ever done a tape test to see if the solder resist pulls away from the PCB? Is this an acceptable method for testing solder resist acceptability? This is an issue I am experiencing with our PCBs. I am receiving boards with excess solder o
Electronics Forum | Tue Oct 27 22:52:18 EDT 2009 | davef
Top picture: We're not wild about the 'poor registration,' the differing thickness of the solder mask, and the crud all over the board. But, then again, we don't have a basis for rejection. Bottom picture: No basis for rejection Help us out, what do
Electronics Forum | Wed Oct 28 07:26:19 EDT 2009 | julie331975
I don't like these boards for a couple different reasons. 1. They may be fine functionally but they look like crap. 2. What is our customer going to think when we deliver boards that look like this? They will probably wonder the same thing I do...
Electronics Forum | Thu Oct 29 18:33:18 EDT 2009 | comatose
The top picture probably won't run. You have black soldermask dramatically misregistered and overlapping what look a lot like fids. Either your machines are going to pitch a fit and not find the fid or they're going to center on the soldermask outlin
Electronics Forum | Mon Nov 02 07:16:47 EST 2009 | umar
Base on the top picture condition, seems like the boards condition is a lot with solder splash or solder ball which is per IPC-610 is under reject (under 5.6.2)for class 3 product. While the picture 2 is showing those the solder resist is not melt pr
Electronics Forum | Sun Nov 01 01:33:52 EST 2009 | isd_jwendell
Just my opinion: Top pic - Solder mask registration WAY too far off, without a doubt I would reject. Bottom pic - I would worry that there was/is a contamination that caused the poor looking mask. This may be cosmetic only, but unknown. I would rej
Electronics Forum | Tue Nov 03 18:09:17 EST 2009 | gregoryyork
I think most have summed up the first pictures also is the drillng looking like it is misregistered as well. Better to do a solvent test to determine resist cure not the old stuff the newer chemicals show under cure problem much better. Try your st
Electronics Forum | Sun Nov 01 23:51:44 EST 2009 | boardhouse
Hi Julie, My opinion is that the top board would not pass IPC, solder mask encroachment on pads. Second board is what we call Orange peel,this can be caused two way's. 1) the solder mask was not tack dried enough prior to imaging which caused artwo
Electronics Forum | Tue Nov 03 20:00:47 EST 2009 | davef
Solder Mask Adhesion Pull Test Tape List IPC-TM-650 Test Method 2.4.28.1, Adhesion, Solder Resist (Mask), Tape Test Method, defines the procedure for determining the adhesion of solder resists (masks) used over melting metals, (such as solder plated
Electronics Forum | Mon Jul 26 16:11:52 EDT 1999 | John Thorup
| Could you direct me to comapnies that sell pcb depanelizers? Any info. on this subject will be appreciated. | There are at least a dozen. Search this forum's industry directory for "singulation" and you will find two. Another popular manufactur
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