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IPC Releases Revised IAg Specification

Published: 16 June 2009
 by Staff
BANNOCKBURN, IL – the IPC has released IPC-4553A, Specification for Immersion Silver Plating for Printed Boards that includes revised specifications for the immersion silver (IAg) coating used as a surface finish for printed boards.

Revision A provides a single thickness range that should reduce any confusion associated with the original 2005 IPC-4553 document that included two thickness ranges, one for “thin” deposits and one for “thick” deposits.

According to the subcommittee co-chairs, George Milad, national accounts manager for technology, Uyemura International Corp. and Gerard O'Brien, president ST and S Group, a single thickness range is now possible because the thickness termed “thin” is now such a minor portion of the total [IAg] market, it does not need to be included in the specification.


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