Substrate Stackup (ADS Interface)

After the layout cell view is opened, the mapping of CAD layers, dielectric layers, and materials from ADS to Sonnet need to be defined. All of these elements make up the definition of the substrate stackup.

Not all Sonnet Technology Files contain the mapping between ADS CAD layers and Sonnet Tech Layers. If your Technology File does not include this mapping, you must add it, or the translation will fail.

The Sonnet Technology File Editor is used to develop the substrate definition. You open the Substrate File Setup dialog box by selecting Sonnet > Setup > Tech. File > Edit from the layout menu. If it is not already selected, you should select Technology File (STF, STFX). The Sonnet Technology File stores information about the stackup of a circuit, including its Tech Layers, conductor and dielectric material properties, and Analysis Box cover properties. Sonnet Technology Files allow you to use a single file which may be shared among multiple Sonnet project files. They also provide the capability for foundries to develop material stackups for their PDKs and to distribute them in an encrypted format to protect their proprietary information.In the Substrate File Setup dialog box, a browse button is provided to locate an existing Technology File. Clicking on the Edit button opens the selected file in the Sonnet Technology File Editor. Clicking the New button opens an empty dialog box in the Technology File Editor.

When Technology File (STF, STFX) is selected, many of the settings and controls in this dialog box will be disabled because the mapping and editing are performed in the Sonnet Technology File Editor.

If Substrate (MATL) is selected, you may edit your Substrate File in this dialog box. However, the Substrate File (.matl) is a legacy file format and is no longer recommended. If you need to use this file format, and you need assistance, please contact Sonnet Tech Support.