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EMPOWER Z-grid

Question asked by MARKGOODBERLET on Sep 9, 2003
Latest reply on Oct 3, 2003 by ROB_LEFEBVRE

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Artwork for circuits to be analyzed by EMPOWER is quantized by
the user-selected grid size in the X and Y directions. Does
EMPOWER use Z-directed grid? That is, are layer thicknesses
quantized in any way?

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ROB_LEFEBVRE Oct 2, 2003 4:30 PM
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The Z-direction is quantized anywhere a metal layer is defined in the layout. Normally, you don't need to worry about this, but if you have VERY long vias, you could define extra metal layers in the layout to see if it has any effect.

Rob Lefebvre
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MARKGOODBERLET Oct 3, 2003 2:07 AM
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I am mainly worried about thin substrates. For example,
I am using a 10-mil EMPOWER grid for the artwork but
my substrate is only 5-mils thick. I want to make sure
that the 10-mil quantization I have selected for X-Y dimensions
is not the quantization level for the Z-dimension (i.e. layer thickness).
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ROB_LEFEBVRE Oct 3, 2003 6:31 PM
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You are correct. You do not need to worry about the gridding in the Z direction. EMPOWER will warn you if the z-directed currents are too coarse (substrate too thick).

Rob Lefebvre
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EMPOWER Z-grid

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