Patent ID: 7417711
Filing Date: 2008-08-26
Classification: G03F

Abstract:
1. A lithographic apparatus comprising: an illuminator; a substrate table disposed in a path of a radiation beam from the illuminator; a patterning device support disposed to hold a patterning device in the path of the radiation beam between the illuminator and the substrate table; a projection system disposed in a path of the radiation beam between the patterning device support and the substrate table; a base frame; a balance mass supported by and moveable relative to the base frame and coupled to at least one of the substrate table and the patterning device support; and at least one supporting member attached to the balance mass and to the base frame, wherein the at least one supporting member has a stiff portion and at least two pivot points, wherein the at least one supporting member includes an end portion at a first end of the stiff portion and another end portion at a second end of the stiff portion, the stiff portion being more stiff than at least one of the end portions, and wherein the at least two pivot points allow for movement of the balance mass in a first direction opposite to a direction of movement of the substrate table and allow for rotation in a second direction perpendicular to a plane of the balance mass.