allowedLengthRange

Specifies the allowed length ranges for rectangular shapes on a layer. Non-rectangular shapes are ignored.

allowedLengthRange Quick Reference

Value Types

Examples

Example 1: allowedLengthRange Using RangeArrayValue

Permits three Metal1 length ranges (0.1, 0.2, and >=0.35).

set_layer_constraint -layer Metal1 -constraint allowedLengthRange \
  -RangeArrayValue { "[0.1 0.1]" "[0.2 0.2]" ">= 0.35" }

Example 2: allowedLengthRange Using RangeArray1DTblValue

For shapes on layer Metal1,

• From allowedWidthRange settings, valid widths are 0.3, 0.4, and 0.5.
• From allowedLengthRange, find the first row for which the statement is true:
  • For width < 0.4, length may be 0.8 or greater than or equal to 1.2.
  • For width < 0.5, length may be 0.8, 0.9, or greater than or equal to 1.5 and less than or equal to 2.5.
  • For width >= 0.5, length must be greater than or equal to 3.0.

set_layer_constraint -constraint allowedWidthRange -layer Metal1 \ 
  -RangeArrayValue {"[0.3 0.3]" "[0.4 0.4]" "[0.5 0.5]"}
set_layer_constraint -layer Metal1 -constraint allowedLengthRange \
  -row_name width \
  -RangeArray1DTblValue { \
    0.3 2 "[0.8 0.8]" ">= 1.2" \
    0.4 3 "[0.8 0.8]" "[0.9 0.9]" "[1.5 2.5]" \
    0.5 1 ">= 3.0" } \
  -row_interpolation snap_down \
  -row_extrapolation {snap_up snap_down}

Related Topics

Length and Width Constraints