Patent ID: 7851968

Claim:
A variable capacitance device comprising: at least one first fixed electrode; and at least one second mobile electrode free to move with respect to the fixed electrode along at least one main direction of displacement; each electrode comprising a conductive body having a plate shape and conductive protuberances projecting from at least one face of the body, each electrode arranged such that the faces of each electrode provided with the protuberances are facing each other, the distance separating the two faces facing each other being greater than the sum of the heights of a protuberance from the fixed electrode and a protuberance from the mobile electrode; the protuberances being parallelepiped-shaped beams, parallel to each other, and the protuberance being inclined with respect to the at least one main direction of displacement; the second mobile electrode configured to move mainly in a plane parallel to a plane of a body of the fixed electrode and laterally with respect to the at least one first fixed electrode.