Patent ID: 8593632
Filing Date: 2013-11-26
Classification: G03F,Y10T

Abstract:
1. An exposure apparatus that exposes a substrate with illumination light via a projection optical system, the apparatus comprising: a base member placed under the projection optical system and having a surface placed substantially parallel to a predetermined plane orthogonal to an optical axis of the projection optical system; a substrate stage that is placed above the base member and holds the substrate, the substrate stage having a holding member and a main body section, the holding member having a mounting area of the substrate provided on an upper surface side and a measurement surface having a grating provided on a lower surface side, and the main body section supporting the holding member so that a space is formed between the measurement surface and the surface of the base member; a drive system having an electromagnetic motor that drives the substrate stage; a first measurement system that has a head section placed lower than the measurement surface under the projection optical system, and measures positional information of the substrate stage by irradiating the measurement surface with a measurement beam from below via the head section that is placed in the space as the substrate stage is positioned facing the projection optical system; a second measurement system that is different from the first measurement system and measures variance information related to a position of the head section; and a controller that is coupled to the drive system and controls drive of the substrate stage by the electromagnetic motor based on measurement information of the first and the second measurement systems.