Patent ID: 7697118

Claim:
An optical exposure apparatus, comprising: an XY-axis driven stage; a platen provided on said XY-axis driven stage for holding a semiconductor wafer; a driving ring, in a closed-loop shape, which rotates about a center point of said driving ring, and, a plurality of electrode blinds, connected to said driving ring and to said XY-axis driven stage, which in response to rotation of said driving ring can move between a first position in which said semiconductor wafer can be placed onto and removed from said platen, and a second position in which said plurality of electrode blinds extend over a peripheral region of the semiconductor wafer placed on said platen, so as to cover a plurality of portions of the peripheral region, so that the covered plurality of portions of the peripheral region are not exposed during an exposing process, the electrode blinds being not in contact with the covered plurality of portions of the peripheral region of the semiconductor wafer.