Hi Ted,

A lot of us are in the same boat. We are using Immersion Silver on some boards. There is no standard yet but IPC-4553 is in the works, and you can probably view the draft on the IPC website. The thickness depends on which of two processes is being used. Our spec currently calls for a range of 4 - 22u", which covers both processes.

Thank you, 
Paul Black 
Manufacturing Engineer 
Kronos 
E-mail: [log in to unmask] 
Voice: (978) 947-1520 
Fax: (978) 244-0568 
www.kronos.com 
Improving the Performance of People and Business(tm) 



-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Ted Kong
Sent: Thursday, September 16, 2004 5:58 PM
To: [log in to unmask]
Subject: [TN] Immersion silver finish


Hi Fellow TechNet,

Is there a industry standard on immersion silver
finish thickness (max and min) number?  If anyone is
using this surface finish, please let me know what you
are specifying.

Thanks all in advance.

Ted Kong



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