Circuit board

Abstract

To obtain a circuit board that can suppress the occurrence of partial discharge without adjusting the thickness of the circuit board. [Solution] The conductive layer has an insulating layer, a first conductive layer provided on a first surface which is the surface in the thickness direction of the insulating layer, and a second conductive layer provided on a second surface which is the surface opposite to the first surface in the thickness direction of the insulating layer, and a protective part which has a first protective part and a second protective part and protects the conductive layer, the second conductive layer has a first conductive pattern and a second conductive pattern provided at a distance from the first conductive pattern and on the lower voltage side than the first conductive pattern, the protective part is an insulator, the first protective part covers the second surface and the portion where the second conductive layer is not provided, and the second protective part is provided on the outer circumference of the first conductive pattern and has a higher dielectric constant or a higher dielectric strength than the first protective part.

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