Patent ID: 6917698

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) displaying first virtual data images of the first photographed images 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; (g) determining 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; wherein the first objects are a plurality of electrode pads formed on an object to be inspected and the second objects are a plurality of contactors to be electrically brought into contact with the electrode pads; and wherein: in (b), the second virtual data images of the contactors are displayed with a color having a uniform density, in (d), the electrode pads to be photographed by the first photographing means are reference electrodes for alignment among the plurality of electrode pads formed on the object to be inspected, in (e), the first virtual data images of the electrode pads are displayed with dark and light colors, and in (f), a position where an image density is most changed due to the superimposition of the first virtual data image and the second virtual data image is set to a position where both the virtual data images are superimposed on each other so that both the images are most fitly superimposed on each other.