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David,
 
Immersion gold comes only as pure (soft) gold.  Electrolytic gold can come with various hardness specifications which arise from the amount of co-deposited cobalt and/or nickel in the deposit.  Since immersion gold is a soft, thin deposit, I recommend a life test on the contacts to determine if the gold plating will have an acceptable life after a number of insertion/removal cycles from the device being powered and from the charger.
 
Don Vischulis
 
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of David Harman
Sent: Friday, December 06, 2002 10:43 AM
To: [log in to unmask]
Subject: [TN] gold immersion process standards

 

I have a question regarding gold immersion process standards.  Is there a specification or suggestion I can use to spec out plating thickness and hardness of gold over nickel.

 

The application is used for contacts on rechargeable batteries.

 

 

Thanks

David Harman

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