Electronics Forum: ni

Solder Ball

Electronics Forum | Mon May 20 09:24:32 EDT 2013 | davef

SAC / Ni interface is the IMC (Cu, Ni)6Sn5

Re: Lead-Free Alloy composition used for leaded IC Packages

Electronics Forum | Tue Aug 22 11:23:40 EDT 2000 | Dr. Ning-Cheng Lee

Plating houses seem to exhibit various results. Unacceptable Ni oxidation levels appear to be related to poor Pd plating processes. Ni oxidation can occur at 3 process stages: 1) prior to the Pd being applied (Ni already oxidized) 2) during the p

Solder joint issue

Electronics Forum | Thu May 18 11:27:36 EDT 2006 | patrickbruneel

I'm not on the production floor on a daily basis like the other guys here but here's my 2 cents: With a Ni/Au plating the inter-metallic that needs to be formed is Ni/Sn. Ni/Sn inter-metallic requires higher peak assembly temperature and a longer dwe

Re: Gold Immersion - Soft Joints

Electronics Forum | Mon Oct 25 15:56:56 EDT 1999 | Dave F

William: Three things: 1 If the gold is porous, it will not protect the nickel and the nichel wiil oxidize and become unsolderable. 2 If the nickel is not solderable, the gold overcoat will not improve that. 3 Ag or Au over electroless Ni creates b

Board Plating - Tin-Nickel

Electronics Forum | Fri Jan 02 14:04:56 EST 2004 | jjwhite

Has anyone had any experience with 60/40 Sn/Ni(300 u in.) over Ni(300 u in.)? If so, what kind of solder issues might exist with 63/37 Sn/Pb reflow? Is a different paste needed? Also, what is the benefit of using the same platings with a top plating

Ni/Sn plated parts

Electronics Forum | Tue Jun 15 12:54:34 EDT 2004 | jsmith01

It seems like the break is happening between the sn and ni. The parts are dull in appearance will not take solder even with an iron after they come off so it leads me to believe that there is only ni left on the part. The parts are liquidous for ab

Soldering problem with Au plating PCB

Electronics Forum | Thu Apr 02 14:58:49 EDT 2009 | vladig

Hi Peter, Have the plating thickness checked with XRF. If the layer of Au too thin, then Ni can diffuse all the way through it during the first run and the surface won't be perfectly solderable for the second side. it might also have a thin layer of

Re: Noclean soldering to gold

Electronics Forum | Mon Dec 06 05:18:53 EST 1999 | Wolfgang Busko

Hi Russ, assuming that only your flux changed and the PCB-finish stayed the same it seems to me that the solderability of that finish is somehow poor. About Ni/Au it can be said that the solderconnection is made between Ni and Sn. The Au-finish is ju

problem in solderability

Electronics Forum | Wed Sep 10 12:44:55 EDT 2008 | vladig

Well, it wasn't as easy to figure out the root cause. The last image is below. It shows how the board finish looks like (the trace was under solder mask). AS you can see, the layer of E-Ni is spliting (the board shop admitted the problem afterwards).

Re: BGA and PCB finishing

Electronics Forum | Wed Mar 22 12:53:43 EST 2000 | David Spilker

Be careful if you use Ni/Au. The "black pad" phenomenum can be crippling. We moved from Ni/Au to OSP because of it. I also don't want to return to the lack of flatness of HASL.

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