> ## Design Rule Checks

> For design rule checks that have values, you can change the unit of measure and change the value of each check. The available design rule checks are:

> Type | # | Design Rule Check | Description
> --- | --- | --- | ---
> Clearance | 1 | Min.Clearance (Pad > Pad) | Specify the minimum pad to pad clearance on the same physical layer. Note: Only the pad outline is considered.
> | 2 | Min.Clearance (Pad > Trace) | Specify the minimum pad to trace clearance and pads on the same physical layer. Note: Only the pad outline is considered. Does not take into account traces connected to a pin (pad) on the same net.
> | 3 | Min.Clearance (Trace > Trace) | Specify the minimum trace to trace clearance on the same physical layer. Note: Does not take into account directly connected traces.
> | 4 | Min. Clearance (Comp > Comp) | Specify the minimum component to component clearance on the same physical layer (component top side or component bottom side). Note: Only the logical layer that defines the actual outline of the component is considered. Note: A component entity is usually made up of geometrics on different logical layers (silkscreen, keepout, and so on.), but only the logical layer that defines the actual outline of the component is considered.
> Manufacturing | 5 | Min. Annular Ring | Specify the distance between the pad outline and the outline of its drill hole on all physical layers. Note: The two outlines (geometries) are part of the pin (pad) entity but on different logical layers.
> | 6 | Min. Pad Diameter | Specify the minimum diameter of a pad. Note: Only applicable to rounded pads.
> | 8 | Acute Angle (in deg.) | Specify the minimum acute angle between connected traces on the same physical layer. Note: Only two traces belonging to the same net should be considered.
> | 9 | Min. Drill Hole Size | Specify the minimum diameter of the drill hole size allowed. Note: Only applicable to rounded pads.
> | 10 | Max. Drill Hole Size | Specify the maximum diameter of the drill hole size allowed. Note: Only applicable to rounded pads.
> Electrical | 7 | Max. Via Count | Specify the maximum via count allowed for a net.
> | 11 | Min. Route Width | Specify the minimum route (trace) width allowed in the design.
> | 12 | Max. Route Width | Specify the maximum route (trace) width allowed in the design.
> | 13 | Min. Route Length | Specify the minimum route (trace) length allowed in the design.
> | 14 | Max. Route Length | Specify the maximum route (trace) length allowed in the design.
> | 15 | Empty Nets | Select this check box if you want to check for any nets that are not connected to any pin, via, trace and power/ground plane.
> | 16 | Un-routed Traces | Select this check box if you want to check for any trace segment that is not connected to another trace segment, pin, via on either end.
> | 17 | Single Connection | Select this check box if you want to check for a net connected to only one pin. Exception: power and ground nets.
> | 18 | Short Circuit | Select this check box if you want to check for intersections (on the same layer) of traces that belong to different nets. Note: Trace entities will be divided into n sets where n is the number of nets in the design.
> | 19 | Unconnected Pin | Select this check box if you want to check for any pin (pad) that is not graphically intersected with any traces on the same physical layer.

> ## Verifying a Design

> 1. From the Analysis menu, select Verify Design.

> The Verify Design dialog box appears.

> 2. To enable a design rule, select the associated check box in the Design Rules section of the dialog box.

> To disable a design rule, deselect the check box.

> Note: You can sort the design rules by clicking the column headings for Enabled, Description, or Value.

> 3. To add a value to the selected design rule, double-click in corresponding row of the Value column and enter a value.

> Note: The selected design rule must be enabled to be able to add a value.

> 4. In the Maximum Violations field, enter the maximum number of results you want to display in the Results list.
> 5. From the Distance Units list, select the unit you want to use as the unit of measure.
> 6. Click Verify.

> Note: The Verify button changes to Stop. To stop the Design Verification process at any point, click Stop.

> When the process is complete, the total number of errors found during the Design Verification process, up to the maximum number specified in the Maximum Violation field appear in the Results list.

> 7. To view the description of a violation result, select the violation from the Results list.

> The description appears in the Description field. The description includes information such as the type of violation, the location where it occurs (x- and y-coordinates), the component or entity it affects, and the actual value measured.

> Note: When you select a violation result, AutoVue zooms to the entity or set of entities that were affected and highlights them on the drawing.

> 8. Continue to select violation results to view its description.

> Note: Click Reset to restart a new check.

> 9. Click Close to close the Verify Design dialog box.

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