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Rule category: Routing
Rule classification: Unary
This rule specifies the style of vias that can be used when routing. You have the option to define specific Min/Max/Preferred values for the via's diameter and hole size - defined as part of the rule's constraints - or use via templates available to the board design.
Default constraints for the Routing Via Style rule. Roll the mouse over the image to compare the two modes available.
When this mode is chosen, the constraints region changes to present the following options:
When this mode is chosen, the constraints region changes to present the following options:
All rules are resolved by the priority setting. The system goes through the rules from highest to lowest priority and picks the first one whose scope expression matches the object(s) being checked.
Online DRC, Batch DRC, during autorouting, during interactive routing.
When the mode of the rule is set to Min/Max preferred, the following considerations apply:
When the mode of the rule is set to Template preferred, the following considerations apply:
(StartLayer = 'Top Layer') and (StopLayer = 'Mid-Layer1')
To control the via size for buried vias between mid layer 2 and mid layer 3, the following scope would be used:
(StartLayer = 'Mid-Layer2') and (StopLayer = 'Mid-Layer3')
Alternatively, instead of creating individual rules, you can expand the one rule query using ORs as follows:
((StartLayer = 'Top Layer') and (StopLayer = 'Mid-Layer1')) or((StartLayer = ' Mid-Layer2') and (StopLayer = 'Mid-Layer3'))
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