Patent ID: 7911802

Claim:
An interposer comprising: a first substrate having a concave-convex surface; a second substrate positioned parallel to the first substrate and having a concave-convex surface which faces the concave-convex surface of the first substrate; a capacitor formed between the first substrate and the second substrate and comprising a first electrode formed on the concave-convex surface of the first substrate, a second electrode formed on the concave-convex surface of the second substrate and a dielectric layer sandwiched between the first and second electrodes; a first conductive structure passing through the first substrate, the first electrode and the dielectric layer and being electrically connected to the second electrode at a convex portion of the concave-convex surface of the second substrate; and a second conductive structure passing through the second substrate, the second electrode and the dielectric layer and being electrically connected to the first electrode at a convex portion of the concave-convex surface of the first substrate, wherein the convex portions of the concave-convex surfaces of the first and second substrates protrude with respect to the dielectric layer.