Patent ID: 8258411

Claim:
A circuit board comprising: an electrically conductive sheet coated with an insulative coating that forms an insulating top layer covering one surface of the conductive sheet, an insulating bottom layer covering another surface of the conductive sheet and an insulating edge layer covering an edge of the conductive sheet; a first electrical conductor on the insulating top layer and the insulating bottom layer and on at least part of the insulating edge layer, wherein the insulating edge layer and a portion of the first electrical conductor thereon each have an arcuate or rounded shape in a direction perpendicular to a plane of the electrically conductive sheet, and the portion of the first electrical conductor on the insulating edge layer is electrically isolated from the edge of the conductive sheet by the insulating edge layer, the combination of the portion of the first electrical conductor and the insulating edge layer it overlays being positioned in a notch defined in an outer edge of the circuit board; and a second electrical conductor on the insulating top layer and the insulating bottom layer and on at least part of the insulating edge layer which is in the notch, wherein a portion of the second electrical conductor on the insulating edge layer is electrically isolated from the portion of the first electrical conductor in the notch, the notch has an arcuate shape in the plane of the electrically conductive sheet.