[SI-LIST] reference plane of W element
- From: "zam jawa" <vm2005@xxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Mon, 14 Mar 2005 14:52:48 +0000
Hi all, I am zam, a student. This is my first posting so I hope I did not
open a thread in the wrong section.
I am currently doing a study on decoupling of power bus. I am using the w
element in hspice to model the interconnects. However, I am not certain of
the reference plane in this w element. Does hspice model it as a perfect
conductor? I read through the manual esp on the field solvers examples but
all of them uses PEC as the material for the reference/metal layer. Does
thismean that if I use a metal layer made of copper, the reference plane
becomes non ideal? So if I do not want a perfect reference plane, how do I
goabout it? Hope somebody out there can clarify with me on this matter. Have
a nice day people. [IMG]
Below is part of my netlist for my study:
W1 vdd gnd vddpin gnd N=1 l=0.15
+FSmodel=mysolver
+INCLUDERSIMAG=YES
.MATERIAL diel_1 DIELECTRIC ER=2.5
+LOSSTANGENT=1.9e-3
.MATERIAL copper METAL
+CONDUCTIVITY=5.88e7
.SHAPE mytrace RECTANGLE WIDTH=127um HEIGHT=35um
.LAYERSTACK mystack
+LAYER=(copper,35um),LAYER=(diel_1,630um)
.FSOPTIONS myoption ACCURACY=HIGH
+GRIDFACTOR=1 PRINTDATA=YES
+COMPUTEGD=YES COMPUTEGO=YES
+COMPUTERS=YES COMPUTERO=YES
.MODEL mysolver W MODELTYPE=FieldSolver
+LAYERSTACK=mystack FSOPTIONS=myoption
+RLGCFILE=microstrip.rlgc
+CONDUCTOR=(SHAPE=mytrace MATERIAL=copper ORIGIN=(0,665um))
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