Setting Layer Thickness

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Layout Editor User Guide >
Configuring a Stackup >
Setting Layer Thickness

A layer’s thickness is measured from the point of elevation. For example, if the elevation of a signal layer is 2 microns and the thickness is 4 microns, the layer begins at 2 microns and extends upwards for 4 microns to a height of 6. In the Edit Layers window, the Thickness column indicates the thickness of each layer.

To set a layer’s thickness:

1. In the Edit Layers window, click the Stackup tab.

2. In the Thickness column, double-click a layer’s Thickness text box.

3. Type a new value and its units in the text box. The default units are millimeters.

The value can be specified using a number (e.g., 0.5um), a variable (e.g., $H), or an expression (e.g., $H-0.5um+$W). If the Drag Mode is “manual align,” the variable or expression is entered as the value. For any other Drag Mode setting (including no setting, as with a dielectric layer), the variable or expression is evaluated to a constant value and the constant value replaces the variable or expression. A message box appears for you to confirm the replacement.

4. Press Enter.

The layer is assigned the thickness you entered.

Note

Infinite ground layers cannot be modeled with thickness.

Warning

Assigning thickness to signal layers significantly increases the solution time. The number of unknowns that Ansoft Designer software must compute doubles when you increase the thickness from zero (infinitely thin) to a finite number. Therefore, if possible, model signal layers as infinitely thin objects.


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Setting Layer Thickness

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