Patent ID: 6147745
Filing Date: 2000-11-14
Classification: G03F

Abstract:
An exposure apparatus comprising:a frame member;a first stage provided in a lower portion of the frame member;a leveling mechanism configured to adjust an orientation of the first stage;a second stage positioned over the first stage and fixed to the frame member;an exposure area limiting mechanism positioned over the second stage, said exposure area limiting mechanism defining an opening through which light is capable of passing during exposure, said opening having an area for limiting an exposure area of the second stage;an illuminating system configured to irradiate light to the exposure area limiting mechanism, said illumination system including a shutter and an exposure sensor for sensing an amount of light that will exit the illumination system, wherein the shutter is controlled in response to the exposure sensor to control the amount of light exiting the illumination system to the exposure area limiting mechanism; and a detecting mechanism configured to detect the alignment of the first and second stages;wherein the leveling mechanism comprises:a level having one end pivotally connected to a base member that supports the first stage;an actuator for elevating the other end of the lever;a supporting member interposed between a top surface of the lever and a bottom surface of the first stage; and a sensor interposed between the lever and the base member, and wherein said leveling mechanism adjusts the orientation of the first stage with respect to the base member.