[PCB_FORUM] Re: Is silkcreen affects the traces with impedance

Marie:

Silkscreen will affect the impedance of traces, but it will only affect 
impedance matching if there is a difference in thickness of the soldermask 
above the traces you are trying to match.  According to our stackup guy, you 
may get as much as a 1Ω difference due to normal soldermask variances, which is 
well within the usual impedance tolerances.

--
George Patrick
Tektronix, Inc.
Central Engineering, EDS Applications Support
P.O. Box 500, M/S 39-512
Beaverton, OR 97077-0001
* 503-627-5272 (voice)     * 503-627-5587 (fax)
http://www.tektronix.com<http://www.tektronix.com/>    
http://www.pcb-designer.com<http://www.pcb-designer.com/>

"Off-Grid and Proud of it!"

-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx 
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of malou teoxon
Sent: Friday, September 26, 2008 01:27
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Is silkcreen affects the traces with impedance


Hi friends

I have a question here. Do you have any idea if the silkscreen on  top of 
traces with impedance affects the impedance matching of that traces.

Regards
Marie.

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