Drawing a Via

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Layout Editor User Guide >
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Drawing Geometric Objects >
Drawing a Via

A via is an object that extends in the z direction and connects two metal layers, allowing a signal to travel from one layer to another. Unlike cross-layer plates, vias have volume, can be electrically large, and vary in shape. For these reasons, they use greater computational resources.

Vias are created from two 2D objects. Each 2D object is located on a trace layer. The via is extruded between the 2D objects when the mesh is generated, thereby connecting the layers. Vias can be 2.5D or 3D.

2.5D Vias

2.5D vias must have a circular cross-section and be strictly vertical. A 2.5D via has a finite radius and the current is assumed to be flowing along the surface of the via. The current flow is assumed to be strictly vertical; Designer treats it as a 1D wire connecting the two layers.

All 2.5D vias have a default complex load impedance of zero.

3D Vias

3D vias can be any shape, but the 2D objects they connect must have the same number of edges. The current is assumed to be flowing from the surface of the via in all directions.

Note

3D vias may contain voids. Voids in 3D vias can be placed entirely or partially within the outer contour. No attempt is made to geometrically align voids in the upper polygons with those in the lower. Rather, the order in which voids on different layers were created is used to control their alignment.


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Drawing a Via

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