You encapsulate traces/pads with Electroless Gold and eliminate future contaminations due to copper/nickel corrosion I guess.
------Original Message------
From: Steve Kelly
Sender: TechNet E-Mail Forum.
To: TechNet E-Mail Forum.
ReplyTo: TechNet E-Mail Forum.
ReplyTo: Steve Kelly
Subject: [TN] Wire bondable gold
Sent: Mar 31, 2010 3:20 PM

Hi all,

Anyone know a reason why a customer would call up 20 micro inches of electroless gold followed by 50 micro inches of electroplated soft gold for thermosonic gold wire bonding? Is there an advantage to having the electroless underneath?

Regards Steve Kelly













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