Electronics Forum | Sat Feb 02 09:33:33 EST 2002 | davef
�8.4.2, Cracking Of Soldered Joints in the epic "Soldering In Electronics" by RJ Klein Wassink [Electrochemical Publications,ISBN 0 901150 24 X] covers cracking differented by: * Overloading * Creep * Fatigue You can't go wrong by starting there.
Electronics Forum | Fri Feb 01 14:23:47 EST 2002 | delnosa
Looking for help on getting information on understanding the physics of micro-fracture growth rate within the BGA ball (or solder joints in general). Hoping to find a fairly straight forward study on the concept/theory of this topic. I'm not a meta
Electronics Forum | Tue Oct 24 13:52:06 EDT 2006 | ehess
we have an operator who is being prescribed to wear a bone growth stimulation system. Does anyone know if tis is ESD safe? Can he wear that on the production floor as long as he's grounded and have it stored inside his smock?
Electronics Forum | Tue Oct 24 16:30:18 EDT 2006 | jax
Without getting into an electrical field promoting bone growth... As long as he is grounded through heal straps and/or wrist straps, it should be fine. Although I imagine being grounded would neutralize the "Bone Grower"
Electronics Forum | Tue Oct 24 20:15:37 EDT 2006 | davef
Use a field meter to quantify the effect of having this bone growth stimulation equipment near ESD sensitive devices.
Electronics Forum | Tue Oct 24 14:52:41 EDT 2006 | stepheniii
It must be at least a little more ESD safe than a polyester sweater. And I'm sure at least at sometime someone has worn some clothing made of plastic fibers at your place. basically find the worst thing you allow, (probably polyester sweaters) and
Electronics Forum | Tue Oct 24 14:58:08 EDT 2006 | ehess
the guy has a borken collarbone, and this "promotes healing by inducing a weak electrical current at the fracture site." The distributor says it's ok. I kind of wonder if it really is.
Electronics Forum | Wed Nov 29 01:12:12 EST 2006 | callckq
Dear Davef, Thanks for your input...The crack happen at the pad/solder ball interface..Pls review the new thread that I post just now with title called "BGA BALL CRACK AT PAD/SOLDER BALL INTERFACE" Thanks!
Electronics Forum | Mon Nov 27 08:05:50 EST 2006 | davef
There is no standard for a strain gage measurement of allowable deflection of a board or a fixture. It's possible that your fixture is causing the BGA cracking that you see. What protion of the BGA is cracking? If it is the solder connection, sear
Electronics Forum | Sat Nov 25 21:26:55 EST 2006 | callckq
Dear all, I have an issue here where we found BGA crack. Understand from friend, we need to study any possiblity of our own jig or fixture cause this problem via strain gauge measurement..My question: Is there any standard @ specification establish
