Electronics Forum | Fri Jan 15 15:17:21 EST 1999 | Earl Moon
| | Hello, | | | | We are qualifying new sources of PWB vendors. We've got the first lot of "produciton" boards in and we want to put them through the paces before turing the vendors on. | | | | So far, the tests I can think of performing, and tha
Electronics Forum | Thu Oct 26 08:59:57 EDT 2000 | ptvianc
Performing a wetting balance test would be very difficult. The flux cored wire "configuration" is just not compatible with the methodology of the wetting balance test. If the wetting balance is a must, then you might ask the vendor for the flux for
Electronics Forum | Wed Oct 20 10:49:04 EDT 1999 | Brian
Hi! Stu's method is a half-truth. What it measures is the aggregate of all volatile material with a significant vapour pressure at the baking temperature, not just H2O. Short of very complex methods, it could be complemented by a comparitive measur
Electronics Forum | Sun Feb 23 15:20:26 EST 2003 | davef
We section no bare boards at incoming. If we have a problem that needs investigation, our suppliers do the sectioning for us. If we didn't trust their analysis, we'd: * Get a new supplier. [There is tons of capacity in this industry.] * Use an ind
Electronics Forum | Fri Apr 16 08:20:58 EDT 2004 | Bob L.
We've seen problems with BGA balls breaking at in-circuit test. I did some bend testing and found that our large BGA's can handle amazing stresses at low strain rates but we get brittle fractures at high strain rates, especially with Ni/Au surface f
Electronics Forum | Tue Sep 06 09:20:50 EDT 2005 | Bob R.
We approached it the same way we select SnPb pastes. We started by doing coupon level tests to sort out the obvious "bad" pastes: SIR, wetting, solder balling, print quality, etc. That cut the field in half. From there we started to do assembly l
Electronics Forum | Wed May 12 11:02:00 EDT 2010 | eugene123
Hope every one are in good condition. I am Eugene, QA Engineer from Singapore, I been assigned to perform a electromigration test for the test coupon that consist 96 test point. Test condition: 85 deg C, 88% RH and 50V DC Measure Condition: 100V DC a
Electronics Forum | Tue Oct 01 10:47:45 EDT 2002 | davef
Board fabricators purchase laminate in preferred panel sizes, such as: 16 x 18 inches, 18 x 24 inches, and 21 x 24 inches. A larger panel size provides more effective cost per unit area processed. In producing a board, the fabricator requires maybe 3
Electronics Forum | Tue Nov 11 17:35:08 EST 2008 | davef
SM-840, is a material qualification document only, with all the test requirements applicable only to a defined test coupon, not to production boards. So, it's useless for what you're trying to accomplish. As assemblers use A-610 - Acceptability Of E
Electronics Forum | Tue Jan 17 14:59:03 EST 2023 | symakhan
Hello Again A few days ago, I posted about Solar panels installation in my construction project. I got amazing response from everyone. I am grateful for all the advice and suggestions. I am also sharing all the details here in hope they will be help
