Patent ID: 8441774

Claim:
A capacitive element comprising a capacitive formation portion that includes an opening for surrounding a circuit that generates high-frequency power or needs to be protected from high-frequency power, wherein the capacitive formation portion, which is shaped in form of a loop, includes an electrode in the shape of a closed curve, a dielectric layer that covers the electrode, and an opposite electrode that covers the dielectric layer and faces the electrode, wherein the dielectric layer is piled on a ceiling surface, a bottom surface, and side circumference surfaces of the electrode; and the opposite electrode is piled on a ceiling surface, a bottom surface, and side circumference surfaces of the dielectric layer; the electrode includes at least one first projecting portion for electric connection which is formed as a portion that projects from a core of the capacitive formation portion in a direction of inside the capacitive formation through the inner circumference of the capacitive formation portion, and at least one second projecting portion for electric connection which is formed as a portion that projects from the core of the capacitive formation portion in a direction of outside of the capacitive formation through the outer circumference of the capacitive formation portion; the dielectric layer and the opposite electrode surround, except the first and second projecting portions, the electrode; and the first projecting portion serves as a connection portion to be electrically connected to the circuit.