Patent ID: 6384898
Filing Date: 2002-05-07
Classification: G03B,G03F

Abstract:
A projection exposure apparatus which transfers a pattern formed on a mask onto a substrate by illuminating the pattern, comprising:an alignment system which is provided with a light source for emitting a white flashing light and which emits said white flashing light onto an alignment mark provided on said photosensitive substrate and which receives reflected light reflected from the alignment mark to image an image of said alignment mark; a substrate stage which shifts said photosensitive substrate in a two dimensional plane, said photosensitive substrate being placed on said substrate stage; a stage position measuring system which obtains information on positions of said substrate stage in synchronization with emission of said white flashing light; and a positioning device, which is electrically connected to said alignment system and said stage position measuring system, and which performs relative positioning operation of between said substrate and said pattern formed on said mask based on a detecting result of the alignment system and a measuring result of the stage position measuring system; wherein said projection exposure apparatus transfers an image of said pattern formed on said mask onto said substrate by illuminating the pattern formed on the mask after said relative positioning operations by said positioning device.