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The average DC current density specifies how much average DC current a shape on the specified layer can handle.
The average DC current density attribute has one of the following values, each of which return a float that represents the average DC current density in mA/µm, where the distance refers to the width of the wire.
If an oaFltValue is specified, the value represents the average DC current a wire can handle.
If an oaIntFltTblValue is specified, the integer value represents the width of the shape, and the float value represents the average DC current the wire can handle.
Use the average DC current density attribute to limit the average direct current density used. The average direct current is the average current used over multiple clock-cycles in one direction (typically only on power and ground wires). If a wire carries more than its limit, it shrinks over time due to electro-migration effects, and eventually fails.
Return to oaLayer documentation
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