Electronics Forum | Mon Mar 10 20:14:20 EDT 2008 | davef
We'd be unhappy with features that are not in copper that is at the same level as the component pads, because of difficulties the fabricator would have in maintaining registration between the copper pads and the ink used for the features not in coppe
Electronics Forum | Wed Mar 12 07:33:40 EDT 2008 | callckq
Hi All, One PCBA failed test after went through the Shock Test(Vibration) and suspected to be BGA solder ball crack. We performed dye and pry and found PCB's pad lifted with red mark ink penetrate pad underneath, what does this mean? Can I say the
Electronics Forum | Wed Mar 12 10:26:10 EDT 2008 | realchunks
Why would a board failure related problem be a process problem. I agree most companies believe EVERY problem is a Proces Problem, but in the real world we know this is not true. A pad lifting means your solder joint was able to rip it off the boa
Electronics Forum | Wed Mar 12 23:00:10 EDT 2008 | davef
You can say: The pad was lifted after reflow and prior to the dye and pry failure analysis. When we see lifted pads, we think: * That's a good solder connection * Either it took a lot of force to lift that pad or the fabrication of the board in the
Electronics Forum | Wed Mar 12 12:28:52 EDT 2008 | operator
I recently witnessed a process in which the solder pot operator used Techspray WSOL water soluble masking to cover the areas around a connector that was to be soldered on the solder pot. He did not wait for the WSOL to cure. He soldered immediately.
Electronics Forum | Mon Mar 17 15:45:59 EDT 2008 | slthomas
Something to consider is the ability to pick from 2mm tape if you're going be placing 0402s. Quads can't really do it (at least they couldn't do it about 6 months ago when we inquired), but you can program two feeder locations for the same feeder and
Electronics Forum | Thu Mar 20 16:38:49 EDT 2008 | slthomas
I did similar investigation a while back and what I concluded is that the GSMs would be more trouble to set up than the Philips Topaz we were also looking at. It is trouble enough, but we only use it for our longer running jobs and we use FES carts t
Electronics Forum | Fri Mar 14 11:28:09 EDT 2008 | operator
I agree. The only way to make them care is to show them how it effects their pocket book. If you don't charge them they will continue not caring. If you do charge them you risk hurting their feelings and making them look bad in front of their bosses
Electronics Forum | Tue Mar 18 22:30:20 EDT 2008 | test74
Completely agreed. That is what the DFM is for. It gives you, the contract manufacturer, the opportunity to describe what you find to be the trouble areas for manufacturability. Given that, you are able to make them acknowledge that if they choose
Electronics Forum | Tue Mar 18 05:32:09 EDT 2008 | gregoryyork
What volume of boards are you putting through. 1Kg per hour does sound very high but then again it does depend on volume Using an antioxidant is a must with Lead Free some alloys have additions in them to start with but those drop out with use so th
