minNestedViaSpacing

spacings(
( minNestedViaSpacing tx_cutLayer 
 'maxSideViaNeighbors n_maxSideViaNeighbors 
 ['maxSideViasWithNeighbors n_maxSideViasWithNeighbors] 
 f_spacing 
)

) ;spacings

(ICADVM20.1 Only – 95511) Specifies the minimum spacing between two nested vias and side vias on the given cut layer. A nested via has vias on all four corners, each with zero PRL. The vias in corners are referred to as side vias.

Values

tx_cutLayer	The layer on which the constraint is applied. Type: String (layer and purpose names) or Integer (layer number)
f_spacing	The spacing between the cut shapes must be greater than or equal to this value.

Parameters

'maxSideViaNeighbors n_maxSideViaNeighbors
	The maximum number of neighbors allowed for a side via.
'maxSideViasWithNeighbors n_maxSideViasWithNeighbors
	The maximum number of side vias that each have the maximum allowed neighbors as specified with maxSideViaNeighbors.

Examples

• Example 1: minNestedViaSpacing with maxSideViaNeighbors
• Example 2: minNestedViaSpacing with maxSideViaNeighbors and maxSideViasWithNeighbors

Example 1: minNestedViaSpacing with maxSideViaNeighbors

Consider the following constraint. The maximum number of neighbors allowed for a side via is 2. For the figure, let us assume that the spacing is as specified.

Example 2: minNestedViaSpacing with maxSideViaNeighbors and maxSideViasWithNeighbors

Consider the following constraint. The maximum number of neighbors allowed for a side via is 2. Further, only 1 side via should meet this requirement. For the figure, let us assume that the spacing is as specified.

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