Patent ID: 6707289
Filing Date: 2004-03-16
Classification: G01N

Abstract:
An inspection method for inspecting a to-be-inspected board by photographing the board that has been conveyed to an inspection position, in which a pair of holding members for holding the board are moved to move the board in a direction crossing a scanning direction of a photography unit and the board that has been positioned is scanned by the photography unit along the direction of said conveyance of the board, the inspection method comprising:reading coordinate positions of board correction marks applied to said board by said photography unit; computing an amount of positional discrepancy of said board by comparing coordinate positions of board correction marks previously set with the coordinate positions of the board correction marks having been read; and when there are discrepancies between said two kinds of coordinate positions, carrying out said photographing after correcting an amount of movement of the holding members based on said amount of positional discrepancy of the board.