Planar Metal Types
To assign loss to a polygon in Sonnet, you first define a planar metal type by inputting its loss parameters and then assign that planar metal type to a polygon or technology layer used in your circuit.
The Planar Metal Editor dialog box allows you to enter a loss definition for the planar metal type. There are seven different methods for entering loss: Normal, Resistor, Rdc/Rrf, General, Rough, Sense and Thick Metal Model. The different planar loss models are discussed below followed with a procedure for entering new planar metal types.
You do not need to read the details of each loss model. Instead, you should make yourself familiar with the loss models you are likely to use. Most users only need concern themselves with “Normal.”