Properties in Layout XL
Before the Layout XL layout editor can create a layout from a schematic, you must create a layout device for every symbol in the schematic. The layout master of a device or contact can be a fixed cell, a parameterized cell (Pcell), or a device or contact defined in the technology file.
The default values for any given property must be the same in the schematic and the layout. If the default value of a property differs between the two cellviews, and the property has a value of
storeDefault=nil, then when you start the Generate All From Source command, the layout instance is not updated (i.e., the CDF default of the layout is used). This can lead to a parameter mismatch between the layout and the schematic.Pcells are often the most effective because you can assign the dimensions of the device at the time you generate the layout and vary the sizes of a contact each time you place the cell. For more information about Pcells, see the Virtuoso Parameterized Cell Reference.
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