Cut and Stitch Flow in Clarity 3D Layout

To speed up the simulation, you can split up a project into several smaller subdesigns and simulate the subdesigns instead. After solving all subdesigns, Clarity 3D Layout stitches each result together to form a whole project solution result. This function is optional and helps reduce the memory and time spent for solving a project.

Before editing a cutting zone:

• The signal nets for splitting must be selected in Net Manager.
• The ports must be correctly set in the port setup window, and the number of the ports should be even.

To set up Cut-Stitch Options, click Cut and Stitch Options in the workflow pane. Alternatively, select Tools – Options – Edit Options – Cut and Stitch Options.

The Options dialog is displayed, as shown below.

You can set up the following options here:

• Automatically launch out models and stitch solutions: If checked, the workflow will automatically solve each cut structure and cascade the S-parameters from each solved model.
• Edge shape width: Specifies the width of the edge shape. The default is 2 x trace width.
• Port width: Specifies the port width. The default is 8 x trace width.
• Port length: Specifies the port length. The default value is the width of the trace.
• Via diameter: If you select this option, the workflow automatically adds stitching vias from the added shapes to other DC planes or shapes on other layers.

To run a simulation of cut and stitch flow yourself and see the results, click here to access the RAK on Clarity 3D Layout Cut and Stitch Flow.

Team SimTech

Cadence Design Systems