Patent ID: 6122059
Filing Date: 2000-09-19
Classification: G03F

Abstract:
A scanning exposure apparatus comprising:an original plate stage for moving an original plate;a substrate stage for moving a substrate; andan original plate laser interferometer and a substrate laser interferometer for measuring positions of said original plate stage and said substrate stage, respectively, in which a pattern of the original plate is transferred onto the substrate by exposure by moving said original plate stage and said substrate stage in a scan direction on the basis of measured values obtained by said laser interferometers,wherein said original plate laser interferometer comprises a Y-direction laser interferometer for measuring an original plate stage position in a Y direction as the scan direction and an X-direction laser interferometer for measuring an original plate stage position in an X direction perpendicular to the scan direction,said substrate laser interferometer comprises a Y-direction laser interferometer for measuring a substrate stage position in the Y direction and an X-direction laser interferometer for measuring a substrate stage position in the X direction, andsaid original plate and substrate Y-direction laser interferometers use light from a single Y-direction laser head and said original plate and substrate X-direction laser interferometers use light from a single X-direction laser head.