Patent ID: 7286242
Filing Date: 2007-10-23
Classification: G01B

Abstract:
1. An apparatus for measuring a characteristic of a thin film, the apparatus comprising: a substrate carrier unit, including: an optical unit, including a light source, for radiating an incident light onto the substrate supported by the substrate carrier; a filter unit for selectively filtering a particular wavelength range of the incident light radiated onto the substrate or of light reflected from the substrate; a 2-dimensional photodetector for detecting the light reflected from the substrate in 2 dimensions, the light having the particular wavelength range selected by the filter unit; an image capturing unit for obtaining image information included in the reflected light detected by the 2-dimensional photodetector; an image processing unit for computing the reflectivities of the thin film with respect to the particular wavelength range of the light using the image information included in the reflective light obtained by the image capturing unit; and an information processing unit for computing the characteristic of the thin film based on the reflectivity.