Patent ID: 7382914

Claim:
A method for moving a main chuck on which first objects are set in X, Y, Z, and θ directions to align the first objects with second objects arranged above the first objects, the method comprising: (a) photographing the second objects through second photographing means to obtain second photographed images; (b) displaying second virtual data images in a second image data area on a monitor screen of a display device on the basis of the second photographed images of the second objects; (c) allowing an optical axis of the second photographing means to match an optical axis of first movable photographing means to obtain a reference position of the main chuck; (d) moving the main chuck to align the first objects with the first photographing means and then photographing the first objects through the first photographing means to obtain first photographed images; (e) comparing the first photographed images with a previously registered first object image, extracting one of the first photographed image which matches the registered first object image, and displaying first virtual data images of the extracted first photographed image in a first image data area on the monitor screen of the display device on the basis of design data of the first objects, (f) relatively moving the first virtual data images and the second virtual data images on the monitor screen to superimpose both the virtual data images on each other; and (g) automatically determining, based upon a calculated value corresponding to a visual characteristic of the first virtual data images and the second virtual data images, a position where both the virtual data images are most fitly superimposed on each other as an alignment position of the first and second objects.