Patent ID: 9740114
Date: 2017-08-22
CPC Classifications: G01B,G03F,H01L,Y10T

Claim:
1. An exposure apparatus that exposes a substrate with an illumination light via a projection optical system and a liquid, the apparatus comprising: a first stage that is disposed above the projection optical system and holds a mask illuminated with the illumination light; a first drive system having a first motor to drive the first stage; a first measurement system that measures positional information of the first stage; a nozzle member provided to surround a lens of a plurality of optical elements of the projection optical system, the lens being disposed closest to an image plane side and having an outgoing surface through which the illumination light passes and which is in contact with the liquid, wherein a second stage that is disposed below the projection optical system and holds the substrate; a second drive system having a second motor to drive the second stage; a second measurement system in which one of a grating section and a plurality of heads is provided at the second stage and the other of the grating section and the plurality of the heads is provided on an outer side of the nozzle member with respect to the projection optical system, above the second stage, and which measures positional information of the second stage with the plurality of the heads that face the grating section; and a controller that controls the first drive system and the second drive system based on measurement information of the first measurement system and measurement information of the second measurement system, respectively, wherein the controller controls the first and the second drive systems so that scanning exposure of the substrate is performed, while compensating for a measurement error of the second measurement system that occurs due to the heads, in the scanning exposure the mask and the substrate each being moved relative to the illumination light.