Attributes Used in Drill Checks

Attributes assigned to features, layers, or the board in the product model control the analysis.

Feature Attributes

Table 1. Drill Checks Feature Attributes
Name	Description
Drill Type	The feature attribute Drill Type is attached to all drill holes on the drill layers. It defines the type of drill and is used extensively in fabrication.
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.
Tooling Hole	This feature attribute is attached to drill features to indicate that they are tooling holes.

Layer Attributes

Table 2. Drill Checks Layer Attributes
Name	Description
Copper Weight (oz)	The weight in ounces of one square inch of copper (default=1oz)
Thickness of Dielectric Below Layer	The thickness of the insulating layer of laminate between copper layers (default=0.0001in.)

Board Attributes

Table 3. Drill Checks Board Attributes
Name	Description
Thickness	The thickness of the printed circuit board

DFM Analyses User Guide NPI11.0
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