Electronics Forum | Fri Feb 01 03:03:08 EST 2002 | madreindeer
Hi, That is very common in WS pastes.It is white residue (Salt) Usually it�s not dangerous it only looking bad. I think best way would be contact your paste supplier and they should know what would take a stain off if not, change supplier. There i
Electronics Forum | Sun Jan 20 21:03:34 EST 2002 | peterson
Hello everyone! We just completed some 16-layer boards and noticed (after wave soldering) that there are some unique, white-ish discolorations. It looks as if someone layed their finger at weird angles on the groundplane areas. It is NOT finger prin
Electronics Forum | Mon Jan 21 09:27:02 EST 2002 | JohnW
Here's a question for you to mull over. I've got a PCB that is 4 millimeters thick, that's about 160thou of USA money if you like it that way. The question is IPC reg's for hole fill say it should be a min of 75% hole fill and 50% on ground planes. A
Electronics Forum | Mon Jan 28 00:48:21 EST 2002 | peterson
Being in the backplane biz, we too, encounter similar problems...especially when our customer reads the IPC as Biblical (you will achieve 75% fill or be turned into a pillar of salt). Anyway, recently, one of our process engineers suggested paste-hol
Electronics Forum | Wed Jan 23 17:14:33 EST 2002 | Shawn
We have seen solder joints that have an orange peel or textured appearance to them after running over our wave solder machine. We thought it may be disturbed solder joints but it does not have the lines or appearance that a disturbed joint usually sh
Electronics Forum | Tue Jan 22 18:53:37 EST 2002 | barry
Hi all, or anyone. We recently purchased some smd equip. to do our own inhouse assy. Though we did purchase a training package it was short and sweet. What I was wonderin is their any tips on oven profiling, we were told that 90% of our product would
Electronics Forum | Mon Jan 28 07:40:40 EST 2002 | cnotebaert
Yes and Yes, Your solder supplier should recomend a profile (standard profile) in most cases you can follow it. Of course you should be running a thermal profile of each board type to verify it is within the specified temp rang. You should also chec
Electronics Forum | Thu Jan 24 20:00:24 EST 2002 | davef
If solder touches gold, you should see solder, rather than gold. Since you see gold, something is wrong. * Is the solder touching the gold? If not, why not? * If the solder is touching the gold, but the gold is not soldering, there is a problem w
Electronics Forum | Mon Jan 28 07:30:21 EST 2002 | cnotebaert
Is it just certain locations on the board, or is it random, does it occur on every board, does this happen on any other products you have been running? If this occurs only on the 1 board and in random locations I wouldn�t say its your wave setup. I
Electronics Forum | Wed Jan 30 08:34:33 EST 2002 | stimpman
Dave, We haven't head issues with the material on Pcb's. The issue is now that the coating is coming off the solder builds up on the fingers. Front side brushes keep the front clean, but the back are a issue. The fingers have a "teflone"? type of c
