Patent ID: 8278210
Filing Date: 2012-10-02
Classification: H01L

Abstract:
1. A manufacturing method of a semiconductor device comprising the steps of: (a) forming downward a concave portion from an upper surface of a first insulator film over a first main surface of a semiconductor wafer; (b) forming a barrier metal film to an inner surface of the concave portion and the upper surface of the first insulator film; and (c) after the step (b), forming an aluminum-type metal layer so as to fill the inside of the concave portion and cover the upper surface of the first insulator film in a sputter processing chamber by ionized sputtering; wherein the step (c) is conducted in a state of directing upward the first main surface of the semiconductor wafer to a wafer stage having an electrostatic chuck disposed in the sputter processing chamber, wherein the step (c) includes the sub-steps of: (c1) forming a seed aluminum-type metal layer so as to cover the barrier metal film at the inner surface of the concave portion and at the upper surface of the first insulator film; and (c2) continuing the ionized sputtering thereby forming the aluminum-type metal layer to fill the inside of the concave portion and cover the upper surface of the first insulator film, and being integrated with the seed aluminum-type metal layer, and wherein the electrostatic chuck is in an off state in the sub-step (c1) and the electrostatic chuck is in an on state in the sub-step (c2), wherein a bias is applied by a second high frequency power for the electrode on the side of the wafer stage in the sub-step (c1), and wherein a bias is not applied for the electrode on the side of the wafer stage in the sub-step (c2).