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1996

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Subject:
From:
[log in to unmask] (Denis Dionne)
Date:
Thu, 08 Feb 1996 22:41:25 -0500
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>
>Can someone define what is meant when Wirebondable gold plating is
>required?..Does this define a specific type of deposit chemsitry?
>Is this refering to a thickness issue?
>

Hi Doug,

Usually this means a 30 to 50 uinches of pure soft gold.  It can be achieved by
electroplating or electroless plating.  A 100-200 nickel diffusion barrier
is also
a common standard. 

Wirebonding requires (for best performance) a pure deposit, a contamination
free surface and uniform coverage/thickness.

If you need more info or a source for such surface finishing please feel
free to 
give me a call.


Denis Dionne
IBM Bromont Ltd
Phone:(514) 534-6724  Fax:(514) 534-7300   
[log in to unmask]



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