 |
 |
 |
 |
 |
 |
 |
 |
 |
|
|
|
|
|
|
|
|
|
The built-in layer constraint definition oacMinEnclosedSpacing specifies the minimum X and Y dimensions of a hole in a geometry on the specified layer. Both the X and Y dimensions of the hole must be equal to or greater than the minimum spacing value established by this constraint.
This constraint should be used in conjunction with the oacMinEnclosedArea constraint. It is possible for geometries to meet the minimum area requirement, but not meet the minimum enclosed space requirement.
| Constraint type: | oaLayerConstraint |
| Value types: | oaIntValue, oaInt1DTblValue |
| Database types: | oaDesign, oaTech |
| Object types: | oaAppObject |
The following value types are supported by this constraint:
If the oaIntValue is specified, the value represents the minimum dimension in database units required for the hole in both the X and Y directions.
Units: DBU
If an oaInt1DTblValue is specified, the lookup key ("width") in the table represents the width of the enclosing metal donut, and the value for the table represents the minimum dimension in database units required for the hole in both the X and Y directions.
Units: DBU
Minimum spacing constraints help to ensure that geometries are not merged together during fabrication, or in the case of the enclosed space rule, that the desired hole is not filled in.
Copyright 2002 - 2010 Cadence Design Systems, Inc.
All rights reserved.