Patent ID: 7123441

Claim:
An electric motor comprising a first part and a second part which are movable with respect to each other, wherein the first part comprises a foil-shaped insulating substrate on which a plurality of series-connected spiral-shaped patterns of conductor tracks are provided, each pattern comprising two main sections with substantially straight and parallel conductor tracks having first and second ends and two intermediate sections with conductor tracks which respectively mutually connect the first ends of the two main sections and mutually connect the second ends of the two main sections, said intermediate sections having a center area halfway between the first ends of the two main sections and halfway between the second ends of the two main sections, respectively, and wherein the second part comprises a permanent magnet unit for generating a magnetic field at the location of the conductor tracks, characterized in that the conductor tracks of the intermediate sections are curved, and each of the conductor tracks of the intermediate sections has a width which, seen from the first ends of each main section and from the second ends of each main section, respectively, to the center area of the intermediate section, initially increases and subsequently decreases.