Patent ID: 7550376

Claim:
A method of manufacturing a semiconductor device comprising the steps of: (a) forming a first interlayer insulating film made of insulating material on a semiconductor substrate having semiconductor elements formed on a surface of the substrate; (b) forming a first intra-layer insulating film made of insulating material on the first interlayer insulating film; (c) forming a recess through the first intra-layer insulating film, wherein the recess has a pad part and a wiring part continuous with the pad part, the pad part has a width wider than a width of the wiring part, a plurality of convex regions are left in the pad part, and the recess is formed so that the convex regions are disposed in such a manner that a recess area ratio in a near wiring area superposed upon an extended area of the wiring part into the pad part, within a first frame area having as an outer periphery an outer periphery of the pad part and having a first width, becomes larger than a recess area ratio in a second frame area having as an outer periphery an inner periphery of the first frame area and having a second width; (d) forming a first film made of conductive material on the semiconductor substrate, the first film being filled in the recess; and (e) removing an upper region of the first film to form a first pad made of the first film left in the recess; wherein the convex regions are disposed regularly in the second frame area along a first direction at a first period P, and a width of the first frame area along the first direction is equal to or wider than said first period P, wherein said first period P is a distance from one convex region to another convex region of said plurality of convex regions including a width of said one convex region.