Since the metal interconnection 38 is fabricated through the opening intersected by two patterned masks, the exterior profile or shape of the metal interconnection 38 could include a square shown in FIG. 6 or a rectangle shown in FIG. 7. On the other hand, the MTJ 52 is formed by an IBE process, the shape of the MTJ 52 preferably includes a circle shown in FIG. 6 or an ellipse shown in FIG. 7. It should be noted that even though the embodiment shown in FIG. 6 pertains to the combination of a square metal interconnection 38 pairing a circular MTJ 52 while the embodiment shown in FIG. 7 pertains to the combination of a rectangular metal interconnection 38 pairing an elliptical MTJ 52, according to other embodiments of the present invention it would also be desirable to interchange the shapes of the metal interconnection 38 and MTJ 52 for forming different combinations of the elements. For instance, it would be desirable to pair a square metal interconnection 38 with an elliptical MTJ 52 or a rectangular metal interconnection 38 with a circular MTJ 52 depending on the demand of the product, which are all within the scope of the present invention.