I am having a problem with ML5CTL_C.

I am trying to extract the coupling capacitance between the center and the nearest trace.

I'm stimulating ports 2 & 3

I sweep the width of the traces from 0.23 um to 2um.

This is for a fixed separation of 0.23 um.

and a length of 100um

There is a discontinuity in my coupling capacitance when W >= 1.63um

I think its changing models for some W/(L,S,H) value.

I am using a 4 layer substrate with eps= 4 for all

H1 = 1.1um

H2 = 1.18um

T2 = 0.53um

H3 = 8.37um

My formula for capacitance is ...

Cc = mag(Y(2,1))/(2*pi*freq*100)

and Y = stoy(S,50)

Also is there a good picture of the Multilayer substrate i.e. not the one in the help file. If not when I am defining a metal layer with some thickness

for example

H1 = 1.1um

H2 = 1.18um

T2 = 0.53um

H3 = 8.37um

Is the metal between layer H2 and H3 or is it in layer H2?

Thank You

Travis

I am trying to extract the coupling capacitance between the center and the nearest trace.

I'm stimulating ports 2 & 3

I sweep the width of the traces from 0.23 um to 2um.

This is for a fixed separation of 0.23 um.

and a length of 100um

There is a discontinuity in my coupling capacitance when W >= 1.63um

I think its changing models for some W/(L,S,H) value.

I am using a 4 layer substrate with eps= 4 for all

H1 = 1.1um

H2 = 1.18um

T2 = 0.53um

H3 = 8.37um

My formula for capacitance is ...

Cc = mag(Y(2,1))/(2*pi*freq*100)

and Y = stoy(S,50)

Also is there a good picture of the Multilayer substrate i.e. not the one in the help file. If not when I am defining a metal layer with some thickness

for example

H1 = 1.1um

H2 = 1.18um

T2 = 0.53um

H3 = 8.37um

Is the metal between layer H2 and H3 or is it in layer H2?

Thank You

Travis

-Mats