2. Core Mask DFF Constraint Set
Index Ref Rule Description Usage Image
1 - Mask Sliver This specifies the minimum width of a mask where
the potential for mask material deposited may
become delaminated from the PCB substrate.
Checks are based on the mask layer being the
standard negative image use model. (DFF_MSK_
SLIVERS)
Non-Etch
2 - Mask Islands This specifies the minimum square area of mask
material, where if the mask area is too small, may
delaminate from the PCB. Checks are based on the
mask layer being the standard negative image use
model. (DFF_MSK_ISLANDS)
Non-Etch
3 - Via Partially
Covered with
Mask Opening
This check detects if there is a via which is partially
covered with a mask shape. (DFF_MASK_
PARTCOV_VIA)
Non-Etch
3. Core Annular Ring DFF Constraint Set
Index Ref Rule Description Usage Image
1 - Pin Hole to Pad The minimum distance of the pin padstack hole to
the outermost edge of the pad geometry. (DFF_
AR_PNHL_TOPD)
Etch
2 - Pin Hole to
Anti-Pad
The minimum distance of the pin padstack hole to
the outermost edge of the anti-pad geometry.
(DFF_AR_PNHL_TO_ANTIPD)
Etch
3 - Pin Missing
Mask
Yes - report missing mask definitions
No - do not report missing mask definitions. (DFF_
AR_PN_MISSNG_MSK)
Non-etch
4 - Pin Pad to
Mask
The minimum distance of the pin pad edge to the
mask pad outer edge. Positive value is oversize,
negative value is undersize. (DFF_AR_PNPD_TO_
MSK)
Non-etch
5 - Via Hole to Pad The minimum distance of the via padstack hole to
the outermost edge of the pad geometry. (DFF_
AR_VIAHL_TO_ANTIPD)
Etch
7 www.cadence.com
OrCAD X DesignTrue DFM Rules Guide
