Patent ID: 8311316
Filing Date: 2012-11-13
Classification: G06K,G06T

Abstract:
1. A detect inspecting method of inspecting an inspection target substrate on which a plurality of films of different kinds are stacked on layers, said method comprising: providing a database storing reference data including a plurality of reference image data, which are obtained by imaging a plurality of reference substrates, respectively, wherein each of said reference substrates lacks only one of said plurality of films of different kinds but includes remainder of said plurality of films of different kinds, and wherein in said reference substrates the lacking films are different from each other, and wherein said plurality of reference image data is classified into categories according to the kinds of the films; imaging an inspection target substrate on which the different kinds of films are stacked on layers, thereby obtaining inspection image data; detecting whether or not any defect exists on the inspection target substrate based on the inspection image data; if a defect exists, extracting color information, of an area containing the defect, from the inspection image data, as color values represented according to a color system; extracting color information of an area, corresponding to the area where the defect exists in the inspection target substrate, from each of said plurality of reference image data, as color values represented according to said color system; calculating a difference degree between the color values of the area of the inspection target substrate and the color values of each of the areas of said plurality of reference image data; and judging that a defect exists in one specific film of said plurality of films of different kinds, if the difference degree between the color values of the area of the inspection target substrate and the color value of the area extracted from the reference image data obtained by imaging the reference substrate lacking said specific one film is smaller than a predetermined value.