Electronics Forum: intermetallic compound (Page 1 of 8)

Measuring intermetallic compound

Electronics Forum | Wed Aug 24 16:30:48 EDT 2005 | davef

Optical microscope or SEM work fine. You say, "I have found out that the method of measuring intermetallic compound(IMC) formation is quite questionable." What's the issue?

Measuring intermetallic compound

Electronics Forum | Wed Aug 24 04:07:31 EDT 2005 | Khoo Meng Tze, Freescale Malaysia

Hi, I am doing a research on the solder ball joint strength of lead free PBGA package. Coming across a dozen of literatures and journals(and the industry itself), I have found out that the method of measuring intermetallic compound(IMC) formation is

Measuring intermetallic compound

Electronics Forum | Wed Aug 24 08:54:30 EDT 2005 | patrickbruneel

SEM to determine thickness and spectrum analyses to determine the metals forming the IMC. This will give you everything you would want to know.

Measuring intermetallic compound

Electronics Forum | Thu Aug 25 04:55:32 EDT 2005 | Khoo Meng Tze, Freescale Malaysia

Hi, Whenever I'm measuring IMC using the optical microscope, I have to make sure that the images captured are clear. If not, then i will have an issue in differentiating the blurry areas between the IMC and solder(for example). This gives variatio

intermetallic question

Electronics Forum | Sat Apr 11 09:56:31 EDT 2009 | davef

You're correct. You should expect to see an intermetallic layer in a proper solder connection. Try leaving the component at temperature for a longer period. Growth of intermetallic compounds on Cu surfaces [Klein Wassink]: d = 10^3(exp(-5*10^3/T)t^1

Intermetallic Compounds

Electronics Forum | Mon Sep 18 18:17:56 EDT 2017 | chintan

IS there an IPC standard or equivalent which specifies the maximum thickness of intermetallic compounds (IMC) in a reliable solder joint?

Solder Ball

Electronics Forum | Mon May 20 22:13:45 EDT 2013 | ultimatejoker

So u mean it is to form the intermetallic compound which is (Cu,Ni)6Sn5?

Intermetallic Compounds

Electronics Forum | Thu Sep 21 20:59:55 EDT 2017 | davef

There is no standard minimum / maximum IMC thickness. * There needs to be an IMC * Thinner IMCs are preferred over thicker IMCs

Intermetallic Compounds

Electronics Forum | Tue Oct 24 11:56:44 EDT 2017 | babymythird0421

As far as I know there is no standard thickness minimum or maximum thickness. It depends

Immersion Au and ENIG surface finishes

Electronics Forum | Thu May 02 07:11:10 EDT 2002 | davef

They probably the same. Most likely someone is saying immersion gold [immersion Au] as a short hand for ENIG [ Electroless Nickel - Immersion Gold]. It is very uncommon to plate gold directly on copper, because gold and copper form a brittle interm

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