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well this is my PCB design with Eagle Autodesk. Ground polygon looks perfect with Isolate value 0.8128 [mm] on Top.

enter image description here

but this value can not effect bottom polygon Why? How can apply 0.8128 isolate value to bottom ground polygon.

enter image description here

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  • \$\begingroup\$ Do you by any chance have multiple copies of the polygon on the bottom layer by mistake? That's the only reason I can think of why the setting wouldn't take effect. \$\endgroup\$ Commented May 8, 2022 at 21:55
  • \$\begingroup\$ well I have sellect all PCB than I found GND polygon and than I see bottom is 0 isolate value. this why i didnt know. but after change the value instead 0 to 0.8128 everything become normal. \$\endgroup\$
    – mehmet
    Commented May 9, 2022 at 18:59

1 Answer 1

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You need to change both planes individually. And using 0 as insulation value will make Eagle use the value provided in the DRC. So you could just set them both to 0 and change them in one go with the DRC

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