Electronics Forum | Tue Nov 05 22:57:50 EST 2002 | davef
Grainy solder is a process indicator. It is not necessarily a defect. Search fine SMTnet Archives for background.
Electronics Forum | Fri Jun 25 15:48:55 EDT 2004 | tcp
The potting definitely is a factor in fracturing the grainy joints, but does not seem to damage a "good" solder joint.
Electronics Forum | Tue Apr 10 10:41:23 EDT 2001 | GregH
What's wrong if my solder joint is grainy ? what will be the effect on its strength ? what process problem is causing that ? regards
Electronics Forum | Tue Nov 05 22:19:07 EST 2002 | Victor Salazar
I am seeing quite a bit of grainy solder joints. I am told this can be from being in a liquidus state for too long. Does anybody have any information on this defect?
Electronics Forum | Mon Nov 11 18:16:54 EST 2002 | Victor salazar
Michelle, I am very interested in hearing your results. Do you have any pics of grainy solder? You may e-mail me direct with any info. I would appreciate it. Thankyou vsalazar@uasc.com
Electronics Forum | Tue Nov 12 13:11:40 EST 2002 | steve
Your heating temperature is too low. Check your process and run the board through again. Then the graininess problem should go away. Or, try some different solder.
Electronics Forum | Thu Nov 21 01:40:11 EST 2002 | ruimsig
The cause of grainy joints is either too high reflow max 225�C, 90 seconds or the reflow temp was tp low
Electronics Forum | Wed Jan 15 19:27:43 EST 2003 | praveen
Grainy finish of the solder joint also caused by higher reflow temp.So far we have observed grainy structure in case of gold plated board.
Electronics Forum | Wed Jan 15 19:27:44 EST 2003 | praveen
Grainy finish of the solder joint also caused by higher reflow temp.So far we have observed grainy structure in case of gold plated board.
Electronics Forum | Sun Jan 18 10:13:59 EST 2004 | davef
Materials added to solder can change its appearance. For instance: * Gold in tin/lead solder is dull / grainy * Palladium in tin/lead solder is dull / grainy We do NOT advocate using visual appearance to define the appearance of a good and a bad so
