Patent ID: 6721041
Filing Date: 2004-04-13
Classification: G03F

Abstract:
A stage device comprising:a first movable stage that moves in a first direction and a second direction different from the first direction, the first movable stage having a first reflective portion extending in the first direction, a second reflective portion parallel to the first reflective portion, and a first reference mark portion; a first position detector that detects a position of the first movable stage cooperating with the first reflective portion; a first mark detector that detects the first reference mark portion when the first position detector detects the position of the first movable stage; a second position detector that detects a position of the first movable stage cooperating with the second reflective portion; a second mark detector that detects the first reference mark portion when the second position detector detects the position of the first movable stage; and a controller that communicates with the first position detector, the second position detector, the first mark detector, and the second mark detector to correlate the first position detector with the second position detector.