Trusted Design Tab

The Trusted Design tab manages comparison to golden gds files.

trusteddesignbar

The following tools are available in the Trusted Design tab:

Import Golden

Opens a dialogue to import the layer.

Golden Compare

Initiates the golden compare operation

Reports

Opens the report in the bottom pane

See the golden compare tutorial: Comparing a Layer to a Golden Layer

Types of Differences

In the following examples, the golden layer is blue, the fabricated layer is red, and the difference is yellow. The tolerance used was 1 micron.

Extra Metal

extrametal

When fabricated metal has no golden metal near it, as defined by the tolerance, then that area will be flagged as an Extra Metal error.

Missing Metal

missingmetal

When golden metal has no fabricated metal near it, as defined by the tolerance, then that area will be flagged as a Missing Metal error.

Bridge

bridge

A bridge is when one extracted polygon overlaps two or more golden polygons. This error is always detected, regardless of the tolerance setting.

Gap

gap

A gap is when one golden polygon overlaps two or more extracted polygons. This error is always detected, regardless of the tolerance setting.

Errors and Warnings

Differences are either considered errors or warnings. In general, differences are flagged as warnings if the highlighted area is smaller than the tolerance.