When I use plane filling for high current paths it coincides with ground plane

Hi, as in the figure when I use zone filling for a high current path (by specifying nets), at the end when I do ground plane It coincides with the power zones they merge. What I am doing wrong ? (Very amateur here)

I believe there is also a problem in inductor input and mosfet connections (fill zones look different)

Zone should only merge IF they are of the same net.
What you might be experience is a zone priority IF one zone overlaps another. In the zone dialog you can set a zone priority which allows you to inform kicad what overlapping zone shape should dominate when it fills

2025-04-07_23-04-1744064350

remember to press “b” to redraw the zones

Zone priority level determines the order in which multiple zones on a single layer are filled. The highest priority level zone on a given layer will be filled first. Lower-priority zones will keep clearance to the filled areas of higher-priority zones. Two zones on the same layer with the same priority level will overlap (short-circuit) with each other, unless they are assigned different nets. When two zone outlines with the same priority and different nets touch, one zone will maintain clearance to the other so that they don’t short.

One of the main goals of PCB design is to separate tracks from zones. If you put the zones on the front (Red), then you should put the tracks on the back side (blue), and vise versa.

Keeping zones continuous, and not interrupted by tracks is really an important goal for any modern PCB design. It’s mandatory if you want to comply with EMC regulations, and even if it’s not for a commercial product, it makes your design more robust and reliable and reduces interference (both receiving and transmitting).

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