Electronics Forum | Mon Aug 08 21:43:23 EDT 2005 | plcc
Hi Davef, After reflow, the pcb board turns yellowish color. However, the board still pass thru' functional test.
Electronics Forum | Mon Jul 24 13:53:38 EDT 2006 | Chunks
Usually when someone is just guessing on what to t-shoot, they will always choose the most expensive part. BGA, QFP, GPS Module....... Same groups believe you can get rid of defects by wearing smocks.
Electronics Forum | Tue Jul 25 08:34:30 EDT 2006 | GS
Does your board passes also through the wave solder step ? If, yes, it could be a matter of secondary reflow on BGA ball solder joints. Best Regards....GS
Electronics Forum | Sat Sep 22 23:57:53 EDT 2007 | accurex
The selection of Test equipment primarily should be driven by the requirement of fault spectrum you would like to capture. If you are looking at Manufacutring defects MDA/ICT would do the job, if you would like to cover the functional aspect a combin
Electronics Forum | Tue Jul 28 09:29:48 EDT 2009 | christian01976
Hello! Did you test the blow off function manually with the input/output monitor? Mayba there is the wrong plug at the valve...
Electronics Forum | Wed Nov 10 16:33:09 EST 2010 | esoderberg
I don't. However we perform inline ICT and functional testing on both sides and the first side has never had issues. It is only when we flip the board and start reflowing on the bottom side.
Electronics Forum | Thu Oct 05 13:33:28 EDT 2017 | duchoang
We did some tests with good result. No failure physically and functionally. Is there report/study/documents about this procedure so we can convince customer to approve our process using ultrasonic wash. Thank you, Dave
Electronics Forum | Mon Jul 01 04:35:22 EDT 2019 | sssamw
It depends on your product application requirement, normally should not drop off board for automotive. Even the dropped board pass function test in plant, it will have problem in its working environment.
Electronics Forum | Wed Sep 08 19:58:17 EDT 2021 | kylehunter
Yes, we soldered some Mil-Max pins on a functional test board before. Utter nightmare. We managed to finally get them on, but yes, terrible wetting, and they act as total thermal sinks. Make sure to oversize you pads.
Electronics Forum | Tue Mar 28 14:23:11 EDT 2023 | smith88
Glass Micro BGA- I consistently have chips or micro cracks from the manufacture and some happen during install, what functionality risk do these pose to the product? They pass test... I cannot find an established criteria for this type of component
