Steve,

I agree with Joyce.  It depends upon the 'freshness' of your boards and any
preceding thermal exposures they may have experienced prior to wirebonding
(and bonding itself...).  The bonds may look good initially, but add a bit
of heat and the bonds will literally fall apart!

Steve C

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Joyce Koo
Sent: Thursday, November 05, 2015 12:14 PM
To: [log in to unmask]
Subject: Re: [TN] Wire bond

not reliably.  but you can do it withstand initial pull strength if you
smash it.  based on my understanding...
           jk
> Hi All,
> Is it possible to wire bond when the finish is gold over copper - no 
> nickel? Thanks. Steve Kelly
>
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