use_worst_cut_blockage_spacing

db.use_worst_cut_blockage_spacing boolean { true | false }

Description

Applies only to shapes whose size is larger than cutClass or minWidth of the layer (blob) and shapes with at least one dimension that is smaller than cutClass or minWidth of the layer (sliver) when the intended measurement style is center-to-center, or the cutClassProfile parameter (for minCutClassSpacing and minCutClassClearance only) is specified. When true, the worst case edge-to-edge spacing or clearance is used as the required spacing and there is no center-to-center measurement. If the cutClassProfile parameter is set, the profile value with the maximum required spacing or clearance is used.

When false, the smaller cut center-to-cut center spacing or clearance (for the largest square cutClass) is used by projecting the Vx into the blob. There is no space checking for slivers, because they cannot be projected into a cutClass. No profile value is used for the required spacing or clearance computation.

Applies to oaMinViaSpacing, oaMinViaClearance, minCutClassSpacing, and minCutClassClearance.

Default value is true.

GUI Equivalent

None

Examples

getvar db.use_worst_cut_blockage_spacing

setvar db.use_worst_cut_blockage_spacing false

Related Topics

Space-based Router Tcl Environment Variables

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