| 摘要 |
To perform high-speed and highly accurate measurement by setting desired measuring conditions for each measuring object. In an alignment sensor of exposure apparatus, in the case of performing position measurement for a plurality of sample shots, measurement is performed by changing the measuring conditions, in response to a measuring axis direction, a mark or a layer whereupon a mark to be measured exists. At that time, for the measuring objects to be measured under the same measuring conditions, for example, a position in a Y axis direction and a position in an X axis direction, measurement is continuously performed. When the measuring condition is changed, a baseline value is remeasured. The changeable measuring conditions are wavelength of measuring light, use and selection of a retarder, NA and &sgr; of an optical system, a light quantity of measuring light, illumination shape, signal processing algorithm, etc.
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