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Subject:	Re: nickel erosion
From:	"Igoshev, Vladimir" <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, Igoshev, Vladimir
Date:	Wed, 26 Nov 2008 22:27:25 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (1 lines)

Are you sure the Ni layer was fine prior to the process? I had a similar case a while ago, BUT it was a problem with plating in "as-received" condition.



Regards,



Vladimir



----- Original Message -----

From: TechNet <[log in to unmask]>

To: [log in to unmask] <[log in to unmask]>

Sent: Wed Nov 26 19:17:12 2008

Subject: [TN] nickel erosion



Any technetters out there experiencing this mysterious nickel erosion process with enig boards on their leadfree waves?  Apparently there is a committee set up already.  I would like to share experiences if anyone is willing to come forward.

 

Essentially, the defect shows up as a dewet on the annular ring of the TH devices.  On cross section, there is large amounts of nickel eroded away and the surface is non-wettable.  No corrosion is evident, so it's NOT black pad.

 

Anybody?





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