Patent ID: 8482744

Claim:
A thin-film inspection apparatus that calculates, for an inspection-target substrate in which a first transparent thin film and a second transparent thin film that are provided for reflectance adjustment and a transparent conductive film have been formed in this order on a transparent glass substrate, a film thickness of each of the first transparent thin film and the second transparent thin film, the apparatus comprising: a storage section that stores at least two feature-value characteristics in which at least two feature values selected from feature values in a spectral reflectance spectrum that are affected by a variation in the film thickness of at least one of the first transparent thin film and the second transparent thin film are each associated with the film thickness of the first transparent thin film and the film thickness of the second transparent thin film; a light irradiation section that irradiates the inspection-target substrate with white light through the transparent glass substrate; a light receiving section that receives reflected light reflected from the inspection-target substrate; and an arithmetic section that obtains measurement values of the feature values stored in the storage section, from a spectral reflectance spectrum generated based on the reflected light received by the light receiving section, and that calculates the film thickness of each of the first transparent thin film and the second transparent thin film by using the obtained measurement values of the feature values and the feature-value characteristics stored in the storage section.