Patent ID: 9030057
Filing Date: 2015-05-12
Classification: G03F,H02K,Y10T

Abstract:
1. A stage apparatus comprising: a first stage; a first magnet array, the first magnet array being associated with the first stage; and a stator arrangement, the stator arrangement being arranged to cooperate with the first magnet array to drive the first stage, wherein the stator arrangement includes a plurality of coils, the plurality of coils including a first coil of a first type, a second coil of a second type, a third coil of the first type, and a fourth coil of the second type, the first coil and the fourth coil being in a first plane, the second coil and the third coil being in a second plane, wherein the first coil is stacked over the second coil and the fourth coil is stacked over the third coil, wherein the first coil and the third coil are arranged to provide a force in a first direction along a first axis, and the second coil and the fourth coil are arranged to provide a force in a second direction along a second axis.