Patent ID: 8224590

Claim:
A mask inspecting apparatus for inspecting a mask having openings used in deposition in a desired pattern, the apparatus comprising: a detection unit for detecting a boundary line of each of the openings of the mask; a storage unit for storing information about a member on which deposition is to be performed using the mask; a setting unit for setting a first boundary line, a second boundary line, and a safety area for each of the openings using the stored information about the member on which deposition is to be performed, wherein the first boundary line forms an outline of a deposition area, the second boundary line surrounds the first boundary line, and the safety area is interposed between the first boundary line and the second boundary line; a control unit for determining whether the boundary line of the mask detected by the detection unit does not contact the first boundary line and the second boundary line and whether the boundary line is present in the safety area; and an output unit for outputting information about openings contacting at least one of the first boundary line and the second boundary line and are in an area that is not in the safety area.