[PCB_FORUM] Re: hopefully question isn't silly

I'm not sure why what to enter because the copper doesn't have dielectric 
constant but there is a spot for it. The readme file says the Er of the 
soldermask. I think i'm entering the right information. Thanks Mike.?

-----Original Message-----
From: Mike DeVita <mdevi@xxxxxxxxx>
To: icu-pcb-forum@xxxxxxxxxxxxx
Cc: icu-pcb-forum-bounce@xxxxxxxxxxxxx
Sent: Tue, 16 Oct 2007 2:25 pm
Subject: [PCB_FORUM] Re: hopefully question isn't silly



Hi Sam, 
We use 5.8e7 for copper conductivity. You asked for loss tangent which is a 
dielectric material property. the larger the conductivity the more resistive 
the conductor is. 

Mike DeVita
Staff Engineer,
Application and Characterization Engineering
VM 480 821-2408 ext 5021
EM mdevi@xxxxxxxxx
FAX 480 855-6345







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sjchar3 


10/16/2007 02:20 PM 





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found an answer, 59.6 X 10^6 but the tool has a default value to 595900, I 
guess that will have to do.


-----Original Message-----
From: sjchar3@xxxxxxxxxxxx
To: icu-pcb-forum@xxxxxxxxxxxxx
Sent: Tue, 16 Oct 2007 2:15 pm
Subject: [PCB_FORUM] hopefully question isn't silly

Group: Setting up "Layout Cross Section" and the top layer is 1 oz copper. In 
the same row it asks for conductivity, dielectric, loss tangent. Anyone know 
the loss tangent for copper?

Sam 
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