Patent ID: 6998737

Claim:
A lithographic apparatus comprising: an illumination system configured to provide a projection beam of radiation; a support structure configured to hold a patterning device, the patterning device configured to impart the projection beam with a pattern in its cross-section; a substrate table configured to hold a substrate; a projection system configured to project the patterned beam onto a target portion of the substrate; and a positioning device configured to position an object table comprising: a first part comprising a magnetic field distribution that periodically alternates in a first direction and in a second direction perpendicular to the first direction, wherein the magnetic field distribution is anisotropic with respect to said first and second directions, and a second part comprising a first set of coils arranged relative to the first part to generate a force in at least the first direction and a second set of coils arranged relative to the first part to generate a force in at least the second direction.