Patent ID: 9158212
Filing Date: 2015-10-13
Classification: G03F

Abstract:
1. An exposure apparatus comprising: an acquisition unit which repeats an acquisition operation to obtain measured values of a plurality of alignment marks arranged on a first substrate while changing a first focus offset quantity for the first substrate, thereby to obtain plural sets of measured values that are measured for a plurality of first focus offset quantities different from each other, each set of measured values representing positional deviation distribution within a shot area; a calculation unit which calculates a plurality of distortion errors from the plural sets of measured values and which correlates a focus offset quantity to an alignment compensation value to compensate for the distortion error with respect for a plurality of focus offset quantities, in response to the obtained plurality of first focus offset quantities and the calculated plurality of distortion errors; a first determination unit that determines a target focus offset quantity when exposing a second substrate; a second determination unit that determines an alignment compensation value for the determined target focus offset quantity, in response to the obtained correlation; and a control unit which controls a second focus offset quantity of the second substrate to reach the target focus offset quantity determined by the first determination unit, and which controls a planar position of the second substrate to reach a planar position corresponding to the alignment compensation value determined by the second determination unit.