REGION SPACING CONSTRAINT SET
In this section, we set the spacing constraints specific to a region of the PCB (namely, a BGA device) across all layers of the
PCB.
1. Go to the CM section, Spacing - Region - All Layers, to pull up the worksheet shown below.
2. Notice we already have a BGA-REGION cell populated on the worksheet. In the cell next to it, under the column named
Referenced Spacing CSet, click the cell.
You get a dropdown showing the list of possible spacing constraint sets, so there is no surprise that our BGA-REGION-PCS
doesn't appear since that's a physical CSet, not a spacing CSet.
3. Let's create the Spacing CSet, then come back later to apply it to this BGA-REGION.
To make the spacing CSet while still in the Spacing domain in CM, click under Spacing Constraint Set - All Layers, as shown
below.
4. Right-click the first cell named P3449_801 (in the Dsn row), then choose Create—Spacing CSet.
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