Attributes Used in Signal Layer Checks

Attributes assigned to features and components in the product model control the analysis.

Feature Attributes

Table 1. Signal Layer Checks Feature Attributes

Name

Description

Copper Balancing

This attribute is attached to features which are added during a pattern fill operation, either manually or through the Copper Balance DFM action.

If a line or arc has this attribute attached, then it will not be reported in the line histogram display.

Copper Feature Ignore

Copper features bearing this attribute are ignored in analysis actions. (Presently implemented only for Rout Test.)

Copper Text

This attribute defines a feature as a nomenclature legend feature. The attribute affects the fabrication analysis by directing spacing checks between such features into a new category (Text to text).

Drill Type

This attribute is attached to hole features in drill layers. It defines the type of drill and is used extensively during fabrication analysis.

Pad Usage

The feature attribute Pad Usage is attached to pads on outer signal layers. It value can be one of the following:

toeprint

via

g_fiducial

l_fiducial

tooling_hole

SMD Pad

This feature attribute should be attached to outer layer pads which are lands for SMD components. It is set by the ‘Set SMD Attribute’ Cleanup Action.

Component Attributes

Table 2. Signal Layer Checks Component Attributes

Name

Description

Ignore Graphically/Output

This attribute is attached to a component to be ignored during DFM actions.

Required Toeprint Spacing

This attribute is specifically attached to components for reporting in the Toeprint to Toeprint category. It defines the maximum spacing within which to report pad to pad spacing measurements.

Range: 1-500

Units: inch or mm