Patent ID: 9588446
Date: 2017-03-07
CPC Classifications: G03F

Claim:
1. A calibration apparatus for adjusting an illumination device of a lithography apparatus, the calibration apparatus comprising: a wafer carrier configured to support a substrate with a patterned layer, wherein the patterned layer comprises a first exposure area, a second exposure area and a plurality of remaining exposure areas, and each of the first, the second and the remaining exposure areas comprises a first checking mark and a second checking mark; a measurement device configured to obtain a first exposure value of the first checking mark of the first exposure area by measuring the first checking mark of the first exposure area, and a second exposure value of the second checking mark of the second exposure area by measuring the second checking mark of the second exposure area; and a processing module configured to calculate a plurality of first calculated values of the first checking marks of the remaining exposure areas according to the first exposure value and a standard file, and a plurality of second calculated values of the second checking marks of the first and the remaining exposure areas according to the second exposure value and the standard file, wherein the illumination device is adjusted by an adjustment device of the lithography apparatus according to the first calculated values during a lithography process.