Patent ID: 7218020

Claim:
An exposure apparatus configured to expose a substrate to a beam patterned by an original, the apparatus comprising: (i) a movable stage configured to hold the original or substrate; (ii) a linear motor configured to drive said stage; (iii) a chamber configured to surround said stage and linear motor such that an enclosed space is formed; and (iv) a vacuum unit configured to form a vacuum environment within said chamber, wherein said linear motor includes: (a) a coil; (b) a jacket covering said coil and forming a flow path through which a refrigerant flows; (c) a magnet provided to said movable stage, said magnet moving relative to said coil by flowing a current to said coil; and (d) non-magnetic metal films provided at a surface of said jacket and a surface of said magnet, so as to reduce transferring of heat through radiation from said coil to said movable stage.