Under the code ENIG
Finish Electroless nickel  3 micrometers min  all 3 classes
Finish Immersion gold  .05 micrometers min  all 3 classes




-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of
Smith, Donn
Sent: Wednesday, July 13, 2005 9:35 AM
To: [log in to unmask]
Subject: [DC] Plating thickness

I find that my set of IPC-2220 has become outdated (specifically 2221).
So that I don't have to wait until I can requisition and receive my new
set, may I impose on someone who already has the new version?

Referencing the Feb 1998 version of that document, Table 4-3 Final
Finish, Surface Plating Requirements (page 20):

Electroless Nickel      2.5 - 5.0 micrometers (across all three classes)
Immersion Gold          0.08 - 0.23 micrometers (across all three
classes)

Here's the question(s):  Have either or both of those thicknesses
changed in the newer version (IPC-2221A)?  If so, what are the new
values?

Thanks very much (in advance)!

Donn

Donn Smith, CID
Senior PCB Designer
GARMIN International
1200 E. 151st Street
Olathe, KS  66062
(913)397-8200
(913)397-8282 Fax
[log in to unmask]
www.garmin.com



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