Electronics Forum | Tue Nov 03 17:52:05 EST 2009 | gregoryyork
Ask if they are seeing to much Phosphorous in the SEM or if they could determine if it is Phosphorous. Could be too much gold Brightener. Also this is not via in pad technology is it.
Electronics Forum | Mon Apr 13 09:27:28 EDT 2009 | hxr6038
We had an issue with the finish, PCB manufacturer is telling that they had a problem with the Nickel rework, which resulted in 20% fall out. Please help me by providing the ENIG thickness for Flex boards, is it same as rigid boards as per IPC 4552. I
Electronics Forum | Wed Nov 04 07:53:56 EST 2009 | tstrat
The phosphorous concentration was not elevated w.r.t. levels needed for black pad syndrome. It is not via-in-pad. The component on the board that has been failing is just a standard BGA.
Electronics Forum | Tue Sep 24 14:38:53 EDT 2002 | Jim M.
The EMS company i work for assembles a small PCB board that requires 10 solid press fit pins installed. The pins are Phosphor Bronze, CDA-510 Alloy, Grade A, 3/4 hard with a finish of .00012 min tin/lead over .00005 min nickel.I would like these pla
Electronics Forum | Thu Jan 29 09:18:36 EST 2015 | davef
Nichrome, manganin, phosphor bronze etc are easy to solder ... the hard part is removing the corrosion * Manganin: 86% copper, 12% manganese, 2% nickel. Often, it's used in making cryogenic measurements, due to its low heat loss. * Select a flux for
Electronics Forum | Fri Apr 29 14:16:16 EDT 2011 | ppcbs
Below is the long explanation. This defect is most commonly found with BGA components, but can arrise with all components. I see it happening more now with lead free boards that are being assembled with a no clean flux. Best short term remedy is t
Electronics Forum | Tue Aug 20 18:15:02 EDT 2002 | davef
Haaaaa!!!! Soldering to plastic!!!! An apt analogy!!! I like to compare it to soldering to dirt. Some thing. In fact, you are soldering on nickel, when soldering on many things. It�s just that the gold, er Pd, flash enables the wetting mechanism
Electronics Forum | Sat Sep 18 12:27:21 EDT 1999 | Earl Moon
| | | Dave, I'll respond by paragraph: | | | | | Brian: | | | | I like Ag2 also. I prefer it over both 63/37 and 60/40, if the price is not a factor. Yes, gold rips through eutectic and near-eutectic solders like habanero slathered shiitake
Electronics Forum | Wed Oct 24 18:08:02 EDT 2001 | davef
1- DF1: WOW!!! How do people get these cool toys? CB: I am with the University at Buffalo Electronic Packaging Lab. http://www.packaging.buffalo.edu We have pretty much everything that is sold on the market as well as Laser inspection technologies we
Electronics Forum | Sat Sep 18 13:05:57 EDT 1999 | Brian
| | | | | | Dave, I'll respond by paragraph: | | | | | | | Brian: | | | | | | I like Ag2 also. I prefer it over both 63/37 and 60/40, if the price is not a factor. Yes, gold rips through eutectic and near-eutectic solders like habanero slath
