The following procedures describe how to specify minimum clearances for the various types of conductor in a design. This is done in the Conductor Clearance: Conductor tab in the Rule Editor dialog. Configure clearance values in the following order.
- Create design rule groups that comprise clearance values for conductors.
- Create design rule stacks, and assign a relevant design rule group to each conductor layer in each design rule stack.
- Specify a design rule stack in the Other net,Same net and Differential pair boxes.
These procedures are described in more detail below.
Configure a Design Rule Group
A design rule group defines the clearances between the types of conductor on a conductor layer.
- Enter a new name in the Design rule group box and click Add. The design rule group is moved to the Design rule group list.
- For each clearance element, enter a value in the cell of the Basic settings table where the row and column of the relevant clearance element intersect.
Note
Multiple design rule groups can be created simultaneously by entering multiple names, separated by a space.
Multiple design rule groups can be created simultaneously by entering multiple names, separated by a space.
Set the Design Rule Stack
Design rule stacks allows you to assign a design rule group to each conductor layer in each design rule stack.
- In the Design rule stack section, define a new design rule stack and click Add. The design rule stack is moved to the Design rule stack list.
- For each conductor layer row in each design rule stack in the Design rule stack table, select a design rule group in the Design rule group column.
Set the Active Design Rule Stack for the Board
Set the design rule stack for the board as follows.
- In the Other net box, select the design rule stack for a different net. The selected design rule stack defines the clearances that are applied by default between conductors with different nets.
- In the Same net box, select the design rule stack for the same net. The selected design rule stack defines the clearances that are applied by default between conductors with the same net.
- In the Differential pair - Differential pair,Differential pair - Power/Ground net, andDifferential pair - Single net boxes, select the design rule stack for each clearance type. The selected design rule stack defines the clearances that are applied, by default, between differential pairs, differential pairs and power or ground nets, and differential pairs and single nets.
