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November 2009

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Subject:
IAu hardness
From:
Chris Mahanna <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Chris Mahanna <[log in to unmask]>
Date:
Mon, 2 Nov 2009 21:17:23 -0500
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Please help a simple EE.

From bare printed boards we are receiving nano-identation (hardness) values for hard (I assume Cobalt) gold in the 3000 MPa range.  Quick and dirty conversion yields ~300 Knoop/Vickers; right?
That sounds reasonable.

BUT, we're getting 6500 MPA for the ENIG.  Is this even possible?  Does anyone know if it is an indication of poor IAu?  Or maybe a poor nano-indentation tester?

Thanks,
Chris


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