minEdgeMaxCount

Specifies the maximum allowed number of consecutive small edges that is permitted in a step to satisfy the minEdgeLength constraint.

minEdgeMaxCount Quick Reference

Constraint Type	Layer
Value Types	`IntValue`
Database Types	Design, Technology
Scope	design, foundry
Category	Length and Width

Value Type

minEdgeMaxCount constraints have an IntValue.

Parameter

maxLength (Value) specifies the maximum length, in user units, for each small edge in the step.

Examples

The example in the following figure permits up to two consecutive edges of less than 0.3.

Format	Example
Tcl	set_constraint_parameter -name maxLength -Value 0.3 set_layer_constraint -layer Metal1 -constraint minEdgeMaxCount \ -IntValue 2 -hardness hard
LEF	MINSTEP 0.3 MAXEDGES 2 ;

Example for minEdgeMaxCount Constraint

minEndOfLineAdjacentToStep

A minimum step rule optionally requires a certain minimum length for end-of-line edges that are adjacent to a minimum edge. If a minimum step edge has an adjacent edge that is also an end-of-line edge, that end-of-line edge must not be shorter than a certain value.

minEndOfLineAdjacentToStep

Constraint Type	Layer
Value Types	`IntValue`
Database Types	Design, Technology
Scope	design, foundry
Category	Length and Width

Value Type

IntValue

Specifies in user units the required minimum length of an end-line edge adjacent to an edge less than the maxLength value.

Required Parameters

maxLength

Specifies the maximum length of the adjacent edge; the constraint applies if the end-of-line edge has an adjacent edge of length less than this value.

Type: IntValue

Optional Parameters

`exceptAdjacentLength`
	Specified that the no adjacent EOL minimum step rule does not apply if the other neighbor edge of the minimum step edge has length greater than or equal to `adjacentLength`. Type: `IntValue`
`noBetweenEol`	Specifies that any end-of-line with length less than the constraint value cannot have adjacent steps of length less than the `maxLength` parameter. Type: `BoolValue` (default is false)
`concaveCorner`	Specifies that both of the neighbor edges of a EOL have concave corner at the other end. Type: `BoolValue` (default is false)
`adjacentLength`	Specifies that the constraint applies only if the other neighbor edge of the minimum step edge has length greater than or equal to this value. Type: `IntValue`

Virtuoso Space-based Router Constraint Reference
Product Version IC23.1, June 2023