A capacitor is provided having a plurality of first conductive columnar portions that each have a nanosized outer diameter. Moreover, each of a plurality of second conductive columnar portions also have a nanosized outer diameter. A conductive portion is disposed on a first dielectric layer and faces at least a part of each of the plurality of first conductive columnar portions with the first dielectric layer interposed therebetween. The conductive portion is also disposed on a second dielectric layer and faces at least a part of each of the plurality of second conductive columnar portions with the second dielectric layer interposed therebetween. A tip of each of the second conductive columnar portions is located closer to a first support portion than a tip of each of the first conductive columnar portions.