Patent ID: 7095485

Claim:
A lithographic apparatus, comprising: a radiation system configured to supplying a beam of radiation; a support structure for supporting a patterning device that imparts a desired pattern to said beam of radiation; a substrate holder configured to hold a substrate; a projection system configured to project said patterned beam of radiation onto a target portion of said substrate; and a linear motor configured to move one of said support structure and said substrate table, said linear motor comprising: a first magnetic plate; a second magnetic plate arranged opposite to said first magnetic plate; an open coil unit, interposed between said first and second magnetic plates, including a plurality of coils wound about respective ferromagnetic cores; and a pair of ferromagnetic members, each having no coil wound thereon and spaced apart from the outermost coils on each side of the coil unit, wherein said first and second magnetic plates and said coil unit are relatively moveable.