Electronics Forum | Fri Jul 21 12:15:52 EDT 2006 | CKH
Hi Folk, every now and then, i would encounter Functional Failure due to BGA ICs. The Testing Tech always conclude that the contact of the BGA to the PCB Pad is poor. The 2D/3D X-ray machine can't detect any of the poor contact on the BGA..... We
Electronics Forum | Mon Nov 20 10:22:18 EST 2000 | Sheng Jin
Hi: Many 75ALS573DW parts we reveived lately from one of our vender have some problem with its pin 2, an output pin of the tranciever ( probably resulting from EOS damage). Its impedance verse GND should be normally 3M ohm up. The parts we have measu
Electronics Forum | Tue Jan 10 08:07:45 EST 2006 | mdemos1
Hi. We have experienced black pad phenomenon on a lot of 200 boards (immersion gold finish). This lot of boards has been completely assembled and we had about 20% fallout during functional test. My question is this ... Is there a way to inspect th
Electronics Forum | Mon Jun 19 05:11:08 EDT 2006 | WEEEsted
Hi, In our setup what we usually avoid is to use RoHS BGA on Pb process. But we use sometimes Pb transistor(4~6pins) on RoHS process, no BGA yet have been reported. Its really difficult to say about reability unless you start running some functional
Electronics Forum | Wed Dec 26 11:01:31 EST 2007 | swag
Thanks, rywman. I do have a solder sample along with dummy BGA's so we should have what we need. This BGA is actually 1152 pins (I didn't have that right in my original post). The bad part is that we are building only one board only and the actua
Electronics Forum | Thu Sep 11 04:59:24 EDT 2008 | mun4o
10x , davef, about LEDs - the problem is , that about 1% of all leds wich we soldering have some defect - not blinking, when I make functional test.I chek 300 leds before solderinig - all is ok.After reflow 1 led not blinking, after SW 3 leds not bli
Electronics Forum | Fri Jan 16 14:42:44 EST 2009 | realchunks
Kester R562 is a 63/37 paste. Not ideal for no-lead parts. I bet you are seeing no-lead BGAs and they will become very weak using your old proile and paste (been there - done that). You can try a hotter profile but will probably just burn off your
Electronics Forum | Fri Jun 05 16:06:51 EDT 2009 | mjz289
This is from a section of an ALtera EP2SGX130-5 STRATIX 2 leadfree 1,508 ball BGA. What can be causing this? It is from an unused board (not assembled in a unit, or in the field, but it did pass electrical and function test. There are three of them i
Electronics Forum | Wed Aug 18 20:27:13 EDT 2010 | adhesivedispenser
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Electronics Forum | Wed Aug 11 19:06:16 EDT 2010 | 1036
We are small PCB assembly business and new. We built 100 boards for my customer recently and 1 of them failed to the function testing. We visually inspected the board several times and do not see any assembly problem. My customer asked us to trouble
