Electronics Forum | Fri May 31 10:15:30 EDT 2019 | davef
Major sources of crack in the solder connection after thermal cycling are: * Thermal heating caused by differences in thermal expansion between the board and the component * Lead-free solder is more rigid and brittle than eutectic solder in simila
Electronics Forum | Thu May 18 09:40:08 EDT 2006 | russ
Good post WML! you helped a lot!, Chunks brings up good point. Are there vias that can be shorted by this component being slightly misaligned? When reworking there could be residual solder or even flux that has shorted the pads or component, etc.
Electronics Forum | Sat Feb 10 09:29:08 EST 2007 | davef
NASA requirements may be a good starting point http://www.hq.nasa.gov/office/codeq/solder.htm
Electronics Forum | Fri May 31 23:48:14 EDT 2019 | dhanish
Thanks Dave..My customer proposing to reduce the solder volume.Can the TCT be improved by reducing the stand-off height?
Electronics Forum | Mon Jun 24 23:21:27 EDT 2019 | sssamw
You may need tell us the background, how PCBA being tested, the test setting and spec. Solder crack maybe due to CTE mismatch or mechanical strain.
Electronics Forum | Mon Jun 18 13:33:46 EDT 2001 | nifhail
Thanx Dave. What about the ball park figure for 20 & 16 mil pitch pull strength. Appreciate your input and thank you in advance.
Electronics Forum | Wed May 17 21:17:07 EDT 2006 | mumtaz
Chunks learn to spell first, then you can place blame on the operators. That's all yu do - blame operators. Get the facts first, even we know how to do that.
Electronics Forum | Thu May 18 10:25:18 EDT 2006 | slthomas
Perhaps a PhD should be able to recognize the difference between a typographical error and a spelling error. Even WE can see that one.
Electronics Forum | Fri Feb 09 09:23:12 EST 2007 | Adam
Hi Would anyone the what the solderjoint cleanliness requriements are, on an assembly which will eventually be operating in a vacuum environment ? Thanks in advance Adam
Electronics Forum | Fri Feb 09 12:28:16 EST 2007 | Snirk Prichards
Me thinks you is on to something. I like day way you tinks and would like to bring to honda plant.
