Agree. We have produced millions of boards with ENIG for Al bonding, but 
would never think of gold wire bonding, at least not ball. Wedge may work, 
but I don't recommend it myself. IF you bond with gold wedge, the underlying 
nickel plate must be free from Phosfor, which is hard to obtain. We have had 
good results with gold bonding to soft boards with electrolytic nickel, but 
that's another story.

Inge

----- Original Message ----- 
From: "Robin John" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, September 24, 2008 12:44 PM
Subject: Re: [TN] Plating types


ENiG is great for Al wire bonding. But you need 10-25 micro inches of
soft gold for gold wire bonding

Robin John



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Anand Paliwal
Sent: Wednesday, September 24, 2008 2:07 PM
To: [log in to unmask]
Subject: [TN] Plating types

Hi all,
i am quite new to this community so pls help me.

What is the Difference between ENIG and Soft gold wire Bondable Plating
?

is the ENIG type of plating for soft wire bondable ?

i have COB on board so i want to specify  Soft Gold wire bondable
plating but
my fab house gives ENIG.


Pls reply

Thanks

Anand

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