Using Polygons on Power Planes | Altium Designer 21 What's New
Traditionally, a PCB power plane is designed as a negative. The objects placed on a power plane layer become voids in the copper when the board is fabricated. In this free Altium Designer training video, learn how and why Altium Designer 21 defines power planes as polygons.
The traditional approach was used because it was more efficient to generate the output data, as the bulk of a plane layer is normally copper. Voids in the copper are only needed in specific locations such as around non-connected pads, or as separation voids when the plane is divided into different voltage regions.
As part of improving support for more complex power plane design, Altium Designer 21 sees the addition of support for defining power planes as polygons. This change does not affect the approach to designing a power plane; they are still defined in the negative - so placing an object creates a void in the copper, and they continue to be split into separate regions by placing a split line. By using polygons, copper islands, narrow necks, and dead copper can automatically be detected and removed.
0:00 Traditional PCB Power Plane Design
0:26 Defining Power Planes as Polygons
0:41 The Benefits of Using Polygons
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