Installing the Software The TCAD tools use the Synopsys Installer tool, which allows you to use a graphical user interface (GUI) or a text script. For information about downloading Synopsys Installer and the TCAD tools, see Installing Synopsys Tools, available at http://www.synopsys.com/install. To install the TCAD tools by EST or from the CD, follow the procedures described in Installing Synopsys Tools. Installing Synopsys Tools shows an example Synopsys media installation script for the synthesis tools. The TCAD software is installed in a similar manner. The TCAD tools are stand-alone products and cannot be installed over other existing Synopsys products. You must create a new directory for each TCAD product (such as Sentaurus, Taurus, Raphael NXT). Sentaurus can be installed in the same Sentaurus directory (STROOT) used for earlier Sentaurus releases (this is recommended). However, do not install Sentaurus in an ISE directory (ISEROOT) containing an earlier ISE TCAD software release.