Patent ID: 8285032

Claim:
An inspection apparatus which detects an anomaly of a substrate, the apparatus comprising: an illumination system which irradiates said substrate with light, and changes a first illumination condition to a second illumination condition different from said first illumination condition; a detection system which detects light from said substrate, and includes a sensor, said sensor including a plurality of sensor pixels arranged in line, said detection system acquiring a first output of said sensor under said first illumination condition and a second output of said sensor under said second illumination condition; a processing system which acquires first data corresponding to said first output, and second data corresponding to said second output, wherein: said processing system acquires a polynomial-approximation-curve function by interpolation using said first data and said second data to calculate a correction coefficient, said detection system changes a sensitivity of said sensor pixels by the correction coefficient, said detection system acquires an image of an inspection area on said substrate by using the sensitivity of said sensor pixels changed by said function, and said processing system detects the anomaly of the substrate by using said image of the inspection area.