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Subject: Re: 4 layers PCB

Date: 08/26/03 at 8:46 AM
Posted by: vivekanandarajah
E-mail: vivek_raja_26@yahoo.com
Message Posted:

In Reply to: 4 layers PCB posted by David on 08/22/03 at 5:09 AM:


LAYER Thickness in mils Dielectric Tracewidth Impedance

TOP Conductor 1.978 20 56.01
Prepreg 14 4.3
GND Conductor 1.38
laminate 28 4.3
POWER Conductor 1.38
Prepreg 14 4.3
BOTTOM Conductor 1.978 20 56.01

Total 62.716


Note: FR4 material is used as dielectric and The effect of lamination dissipation factor
is not consider which may have 1 to 2% in the Impedance Value


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