Electronics Forum | Mon Oct 05 04:55:42 EDT 2009 | pengliang
we suggest as below : the first : check the soldering(solder ball and pad) by X-ray ; second: to do dye analyse (note:pls confrm is there have crack )
Electronics Forum | Wed Apr 16 01:40:17 EDT 2003 | praveen
Hi , We are using water wash solder paste to solder the SMT LED's manufactured by Chicago Miniature lamp (CMD93-21 & 22)and Kingbright. Achieving the solder fillet , wetting has no issue but we observe high fallout at the functional testing. If we do
Electronics Forum | Wed Apr 16 08:43:00 EDT 2003 | davef
Given that the LED work properly after being touched-up and that you don't have problems with other components, you may not be wetting the LED termination solderability protection during your normal reflow. Use a profiler to check the temperature on
Electronics Forum | Wed Sep 30 11:32:45 EDT 2009 | pbarton
What type of conformal coating are you using and are you allowing the coating to migrate under the device in question? If you are allowing the coating unbder the BGA the problem could be CTE of coating is much greater than that of the BGA balls/sold
Electronics Forum | Thu Oct 08 08:15:39 EDT 2009 | kpm135
We've used both 1A33 urethane and 1B31 acrylic coating on our SMT assemblies with great success for many many years. This is with components of all shapes and sizes including a 9 ball micro-BGA. We apply the coating in every way imaginable and we hav
Electronics Forum | Tue Dec 14 20:31:53 EST 2004 | davef
The FIT we mentioned is for a stocked, finished good item. It's for something shipped to a customer.
Electronics Forum | Tue Dec 14 10:58:56 EST 2004 | Peppe
Thanks for your answer Dave. Just a clarification. Given FIT is for just one soldering or for a specific number ? I mean cards we produce have, typically, 10000 soldering joints. Which is the expected FIT of that card ? Thanks again for your help.
Electronics Forum | Tue Dec 14 08:32:10 EST 2004 | davef
Depending on the design, materials selection, end use, etc; we'd expect the FIT of an electronic assembly to be between 30 and 100+. There is no standard.
Electronics Forum | Mon Dec 13 06:21:14 EST 2004 | Peppe
I work in electronic industry and I'm interested about the standard values of FIT (failure in time or useful lifetime) of soldering. In essenze my question is : how much time can work a good solder joint, before became fail ? Exist a minimum and ma
Electronics Forum | Sat Oct 08 19:17:03 EDT 2005 | Mika
What type of "ESD sensitive chips"? What do You mean with failing under production? Question; are the chips placed and properly soldered on the pcb pads?
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