Patent ID: 6154270
Filing Date: 2000-11-28
Classification: G03F

Abstract:
A scanning exposure apparatus in which a pattern of a mask is transferred onto a substrate, the apparatus comprising:an illumination device which illuminates said mask with illumination light pulses, at least part of the illumination device being disposed in a path of the illumination light pulses;a scan device functionally connected with the illumination device, which synchronously moves said mask and said substrate so that each point on said substrate is irradiated with N light pulses (N being an integer);an irradiation energy detector which successively detects energy amounts of respective illumination light pulses during scanning exposure, at least part of the irradiation energy detector being disposed in the path of the illumination light pulses;a calculator which is connected to the irradiation energy detector and which, every time a predetermined number of light pulses are emitted, successively calculates an integrated amount of the N light pulses preceding the calculating, using results of detection by said irradiation energy detector; andan exposure dose controller, connected to the calculator, which adjusts an exposure dose for said substrate, based on the integrated amounts calculated by said calculator.