Patent ID: 8736401

Claim:
A capacitance device comprising: a dielectric layer; a first electrode that is formed in a predetermined first shape on a predetermined surface of the dielectric layer; and a second electrode that is formed on an opposite surface of the dielectric layer opposite to the predetermined surface, has a first region overlapping a projection pattern obtained by projecting the first electrode onto the opposite surface, and is formed in a predetermined second shape, wherein: the first electrode has a first electrode portion including an electrode region corresponding to the first region and extending in a first direction within the predetermined surface; the second electrode has a second electrode portion including an electrode region corresponding to the first region and extending in a second direction crossing the first direction within the opposite surface; the first electrode portion and the second electrode portion are individually formed in such shapes that an area of the first region does not change even when the first electrode undergoes relative displacement with respect to the second electrode within the predetermined surface in a predetermined direction and in a direction orthogonal to the predetermined direction; the shape of the first electrode and the shape of the second electrode have a V-shape respectively; and the shape of the first electrode and the shape of the second electrode are symmetric with respect to one of the predetermined direction and the direction orthogonal to the predetermined direction within the predetermined surface.