Steve,
IPC-HDBK-001 section 5.0.5, Silver Coated Leads, pg 56 states that silver finished leads (solid) are not typically used because of silver migration (silver/tin intermetallic) which can cause solder joint failure. 
 
Evamaria Jones
General Dynamics
Quality Engineer
Instructor

________________________________

From: TechNet on behalf of Vargas, Stephen M
Sent: Thu 3/9/2006 10:10 AM
To: [log in to unmask]
Subject: [TN] Jumper Wires



All:



     We need to add a 30 AWG jumper wire to a lead-free assembly (Class
II). IPC-A-610 says that silver plated stranded wire should not be used
due to possible corrosion under certain conditions. Our thoughts are
that this (corrosion possibility) is unique to stranded wire. Would
silver plated solid wire be an alternative? Any input would be
appreciated. Thanks.



Regards,

Steve Vargas

Sr. Mfg. Engineer

Polaris Contract Mfg. Inc.

[log in to unmask]

508-748-3399 ext.192




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