Extraction System: Setup and Configuration

Use of the extraction features requires setting certain keywords and data blocks in the technology file. There are three types of entries:

1. Keyword descriptions in the various physical layer blocks, including the extraction (see A.6.4) and physical property keywords see A.6.5). These define the layers as conductors and insulators. See the references for complete information.

2. Global attribute variables (see E.24). There are a few such variables for the extraction system, which provide such things as the substrate dielectric constant.

3. The device blocks (see 16.8.1), which appear after the layer blocks in the technology file. These define device structures to be recognized and extracted.

In addition, the user may wish to further customize the technology file by adding scripts which perform some extraction-related function, such as generating temporary layers.

If the user wishes to define a customized format for physical or electrical netlist output, an entry in the format library file can be added. The format library contains scripts which provide formatting for the commands in the Extract Menu that produce netlists. Section 16.8.3 provides more information on this capability.