Patent ID: 9172294
Filing Date: 2015-10-27
Classification: G03F,H02K

Abstract:
1. A lithographic apparatus provided with a planar motor comprising: a stator comprising a plurality of stator poles arranged in a repetitive arrangement with a first pitch, the plurality of stator poles facing a first side of a plane of movement, a mover comprising a plurality of mover poles arranged in a repetitive arrangement with a second pitch, the plurality of mover poles facing a second, opposite side of the plane of movement, wherein each of the poles of at least one of the stator and the mover is provided with a separate winding so as to alter a magnetic field in the respective ones of the stator poles and the mover poles in response to an electric current through the respective winding, wherein at least one of the stator and the mover comprises a permanent magnet configured to generate a magnetic field extending from the permanent magnet via at least one respective pole of the stator and the mover to the other one of the stator and the mover and back, wherein the first pitch and the second pitch are distinct from each other, so that when one of the mover poles of the mover is aligned with one of the stator poles of the stator, the other mover poles of the mover are unaligned with the stator poles of the stator, and wherein a side of each of the plurality of mover poles and stator poles that faces the plane of movement has a tapered edge that is tapered towards the plane of movement.