Patent ID: 7239369

Claim:
A lithographic apparatus comprising: an illuminator; a substrate table disposed in a path of a radiation beam from said illuminator; a patterning device support disposed to hold a patterning device in the path of the radiation beam between said illuminator and said substrate table; a projection system disposed in a path of the radiation beam between said patterning device support and said substrate table; a base frame; a balance mass supported by and moveable relative to said base frame and coupled to at least one of said substrate table and said patterning device support; and at least one supporting member attached to said balance mass and to said base frame, wherein said at least one supporting member has a stiff portion and at least two pivot points, wherein at least one of said pivot points includes a flexible material, and wherein a portion of said at least one supporting member that includes one of said at least two pivot points is rotatable relative to a portion of said at least one supporting member that includes another of said at least two pivot points.