Patent ID: 7609526

Claim:
A circuit board, comprising: an insulating substrate; and a capacitor structure formed integrally on a surface of the insulating substrate; wherein the capacitor structure includes paired linear conductive layers forming electrodes of the capacitor structure, each of said linear conductive layers is arranged directly in contact with said surface of the insulating substrate such that the paired linear conductive layers are parallel to each other with a predetermined distance therebetween, and each of said linear conductive layers has a facing surface which faces toward the facing surface of the other linear conductive layer; wherein a dielectric material is filled in a groove defined by said surface of the insulating substrate and the respective facing surfaces of the paired linear conductive layers which face each other; and wherein said respective facing surfaces of the paired linear conductive layers do not face toward said surface of the insulating substrate, and the paired linear conductive layers and the dielectric material are stacked along said surface of the insulating substrate.