Patent ID: 6555836
Filing Date: 2003-04-29
Classification: G01N,H01L

Abstract:
A method of inspecting bumps provided on a surface of an object to be inspected, said method comprising the steps of:a) irradiating a first irradiation beam on said object in an oblique direction at a predetermined angle with respect to said surface; b) imaging a first reflected beam from said object to obtain a first reflection image including a first regular reflection region, said first regular reflection region being produced by a part of the first reflected beam reflected near an apex of the bump; c) obtaining height data of said bump that corresponds to said first regular reflection region; d) calculating a shifted position of said first regular reflection region on the basis of said height data and said predetermined angle; and e) determining whether said calculated shifted position of said first regular reflection region is within a region in said first reflection image to detect a height of the bump, said determining step comprising: positioning the first reflection image with predetermined data; and setting a central position of the region according to the position information of the bump in the predetermined data.