MOBILE BODY DRIVE SYSTEM AND MOBILE BODY DRIVE METHOD, PATTERN FORMATION APPARATUS AND METHOD, EXPOSURE APPARATUS AND METHOD, DEVICE MANUFACTURING METHOD, AND DECISION METHOD

摘要

A drive device drives a wafer table in a Y-axis direction based on a measurement value of an encoder that measures position information of the wafer table (WTB) in the Y-axis direction and based on known correction information in accordance with position information of the wafer table (WTB) in non-measurement directions (e.g. Z, ¸z and ¸x directions) that are measured by interferometers (16, 43A are 43B) at the time of the measurement by the encoder. That is, the wafer table (a movable body) is driven in the Y-axis direction based on the measurement value of the encoder that has been corrected by correction information for correcting a measurement error of the encoder that is caused by a relative displacement of a head and a scale in the non-measurement direction. Accordingly, the movable body can be driven with high accuracy in a desired direction while measuring the position by the encoder, without being affected by the relative motion between the head and the scale in directions other than a direction to be measured (measurement direction).