Electronics Forum | Tue Mar 24 17:08:52 EST 1998 | Steve Gregory
David, There was a thread going on the IPC TechNet about exactly the same thing... The ratio that was posted is: Less than, or equal to 30-grams per square inch Which means if you weighed a part and it is 30-grams, you'll need .033" of surf
Electronics Forum | Thu Sep 11 15:23:31 EDT 2003 | Peter L.
I have come across a rash of failed assemblies that have 0805 capacitors and resistors, bottom side glued, wave soldered and washed. Trouble shooter reported touching up the solder joints on a few areas and the boards would pass test. I had a look a
Electronics Forum | Fri Jun 09 22:22:59 EDT 2006 | grantp
Hi, Very funny, and I feel so much better not because of your advice, but because your a Dr Dr PhD, and we all know thats more important than experience! Seriously though, so you think we should be ok with the zones we have? We are not sure, and so
Electronics Forum | Thu Jun 22 12:30:52 EDT 2006 | samir
FWIW, My own recent posts for "help" on this forum have resulted in very few or no answers...some examples: http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=9824&#Message39400 I had another post on wave solder flux e
Electronics Forum | Sat Aug 07 11:47:47 EDT 1999 | JohnW
| | | | | | | | | | | | Hello, | | | If you are using no-clean and they are entrapped in the flux it is also IPC accepted but i havent found a customer yet who agrees with that. Im sure you have checked your profile. I had the same problem with chi
Electronics Forum | Mon Jul 26 10:25:12 EDT 1999 | Boca
| | We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. | | The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is that a
Electronics Forum | Mon Jul 26 14:14:51 EDT 1999 | Steve Gregory
| | | We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. | | | The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is th
Electronics Forum | Tue Mar 13 16:05:30 EST 2001 | rob_thomas
Hi, can you definitely attribute the 30%yield to poor bga soldering? What is your high flyer defect encountered on the failed boards.Is this ICT ,flying probe ,functional test yield? Can you determine a defect pattern? Did your subcontractor provided
Electronics Forum | Sat Jun 23 08:29:04 EDT 2001 | davef
Well, at least I don�t feel so bad that we�re not the only ones going anal on this blankin� cap thing. We�re gunna change process on ever effin wave soldered SMT cap!!! I�m going to off myself!!!! And in about 15 seconds, some doodoo brain is goin
Electronics Forum | Fri Jul 02 05:28:13 EDT 1999 | Vinesh gandhi
| | | We are wave soldering some fabs with a lot of unmasked trace area along the edges. The trace area is solid copper covered with tin / lead, no masking, no components along the edges, same on solder side and component side (goofy board design).
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