Electronics Forum | Thu Dec 17 03:45:47 EST 2009 | tod1967
was the wetting test conducted with SN96? Do any Pull or stress testing?
Electronics Forum | Wed Oct 15 09:53:01 EDT 2003 | markhoch
These boards also were above liquidus for 75 seconds, and the customer puts the boards thru extensive thermal shock and stress testing. An Alpha Applications engineer told me that because the boards were above 183 degrees for 65-75 seconds that the i
Electronics Forum | Tue Jul 08 18:53:21 EDT 2003 | MA/NY DDave
Hi The answer in general is no mixing of Lead Free with Sn/Pb solder. If you look at reliability data, failures after stress tests and then SEMs, failures occur at grain boundaries inside the joint. Lots more happens. By the way this mixing happe
Electronics Forum | Fri Oct 23 20:05:16 EDT 1998 | subhash P.
Hi, Am looking out for companies which would perform the "highly accelerated stress testing" for my PCB test assembly samples. does anybody have any info regarding this. thanks, subhash
Electronics Forum | Sat Oct 19 08:28:04 EDT 2019 | davef
Hi Davandran ... Butt leads are not intended for high mechanical strength applications. That's why butt leads are not allowed in Class 3 products. If you want to be sure that your butt leaded component stays on the board, just glue it after solderin
Electronics Forum | Mon Jan 31 21:11:09 EST 2000 | Dave F
Dave: Find: "Comprehensive Surface Mount Reliability Model Covering Several Generations of Packaging and Assembly Technology", by J. Clech et.al. IEEE Trans on Comp. Hyb. and Manuf. Tech. Vol. 16, No. 8 Dec. 1993, p.949. It listed cycle to failure
Electronics Forum | Mon Jan 05 00:30:07 EST 2004 | Arthur Yang
Hi you there, Do you have any experience upon the shelf life of PCBA which passed 100 cycles of liquid to liquid thermal stress test, 125 to -35 centigrade for 15 minutes and 5 seconds of transfer time from 125 to -35 centigarde. Will apprecia
Electronics Forum | Fri Jul 06 10:08:21 EDT 2007 | blnorman
The coating thickness is more a property of the individual coating itself. The 0.03 - 0.13 is based on average properties of acrylics in general. It's like trying to pour 3 mils of motor oil on a table. The material will find it's own thickness.
Electronics Forum | Tue Mar 27 09:21:45 EDT 2007 | realchunks
Hi Donovan, I guess it really depends on the product, how it's built and how you'd stress test it. Many arguments can be made about how far to test, then when one fails in the field was it due to manufacturing or test? But the bottom line is most
Electronics Forum | Mon Oct 29 18:21:43 EST 2001 | slthomas
We recently have received a lot of warped (bowed and/or twisted behond IPC 600 specs.) bare boards (some our fabricator's fault, some ours by design) and I can't help but figure that long term reliability will suffer when building product with them.
