Patent ID: 6538723
Filing Date: 2003-03-25
Classification: G03B,G03F

Abstract:
An exposure method for exposing a substrate by projecting a pattern on a mask onto the substrate with pulsed light from a light source and scanning the substrate relative to the pulsed light, the method comprising the steps of:setting a target exposure dose to the substrate; selecting an exposure control mode either a maximum scan speed mode or a maximum oscillation frequency mode in accordance with the target exposure dose to the substrate, wherein when the maximum scan speed mode is selected, the scan speed of the substrate is maximized and the oscillation frequency of the pulsed light is adjusted so as to expose the substrate by the target exposure dose, and when the maximum oscillation frequency mode is selected, the oscillation frequency of the pulsed light from the light source is maximized and scanning speed of the substrate is adjusted so as to expose the substrate by the target exposure dose; and scanning the substrate relative to the pulsed light by the selected exposure control mode.