Patent ID: 7372186

Claim:
An electrostatic motor comprising: a stationary member including a first major surface and a first back surface opposite to said first major surface; a movable member including a second major surface and a second back surface opposite to said second major surface, said movable member being arranged to be movable relative to said stationary member in a condition where said second major surface is opposed to said first major surface of said stationary member; and a protuberance provided to project from at least one of said first major surface of said stationary member and said second major surface of said movable member, said protuberance ensuring a predetermined clearance between said first major surface and said second major surface; wherein said protuberance is provided on each of said first major surface of said stationary member and said second major surface of said movable member; and wherein, when said stationary member and said movable member are arranged to be opposed to each other, said protuberance of said stationary member and said protuberance of said movable member are arranged in an alternate manner and engagable with each other, without hampering a motion of said movable member relative to said stationary member, to locate said stationary member and said movable member at a proper relative position; wherein said stationary member includes a base film, a plurality of electrodes carried on said base film and a cover film attached to said base film and covering said plurality of electrodes, said cover film defining said first major surface; wherein said movable member includes a base film, a plurality of electrodes carried on said base film and a cover film attached to said base film and covering said plurality of electrodes, said cover film defining said second major surface; and wherein said protuberance is integrally formed on at least one of said cover film of said stationary member and said cover film of said movable member.