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Date: | Fri, 8 May 2009 14:45:13 -0700 |
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Nice one Joe
Victor here is a link describing the effect of solder mask on trace
impedance :
http://www.sigcon.com/Pubs/edn/PassivationandSolderMask.htm
As Joe alludes it is indeed a dielectric with a typical dielectric constant
value of 3.3. You will find in RF designs that often the boards are
specified without solder mask for this very reason.
Have a great weekend,
John
John Burke
(408) 515 4992
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Joe Fjelstad
Sent: Friday, May 08, 2009 1:11 PM
To: [log in to unmask]
Subject: Re: [TN] Solder Mask
Victor
How/why do you conclude that solder mask is not a dielectric?
Cheers,
Joe
In a message dated 5/8/2009 12:37:48 P.M. Pacific Daylight Time,
[log in to unmask] writes:
Fellow TechNetters:
Besides being a moisture barrier and solder dam what else is the
function of solder mask. It is not a dielectric.
Victor,
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