Steve, it will not affect your end item impedance as long as you have not
processed the product as a full body ENIG and then put mask over the top. If
there is soldermask over ENIG which is not recommended due to adhesion
issues you will have to model the thickness and Dk of your soldermask. The
nickel will have an affect on the prop delay depending on frequency which is
more of an issue for your customer at the system level.

Lance P. Riley
V.P. Sales & Advanced Technology
Unicircuit, Inc.
8192 Southpark Ln.
Littleton, CO. 80120
303-730-0505 (CO)
651-697-8900 (MN)
303-548-6464 (Cell)

-----Original Message-----
From: Steve [mailto:[log in to unmask]]
Sent: Wednesday, March 16, 2005 5:00 PM
To: [log in to unmask]
Subject: [TN] Immersion gold

Good afternoon,
A question for the guru's. If I do immersion gold/electroless nickel on top
of an impedance line will it affect the result. Thanks in advance. Steve
Kelly
Sent via BlackBerry
Steve Kelly
PFC Flexible Circuits Limited

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