Hi Geoff,
The formula for capacitance is:

C = .224(Dk)(Area)/Dk thickness

Hope it helps,
FNK

Frank N Kimmey, C.I.D.+
Senior PCB Designer
Powerwave Technologies
PH. 916-941-3159
Fax 916-941-3195


-----Original Message-----
From: Geoff Layhe [mailto:[log in to unmask]]
Sent: Friday, August 16, 2002 9:06 AM
To: [log in to unmask]
Subject: [TN] capacitance


Hi all,
Can anyone direct me to a web page or formula for calculating the
capacitance across a circuit board.
I've been asked what is the capacitance across a 1.6mm FR4 board which has
10 kV on one side and 0 V on the other.
regards
Geoff layhe


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