Patent ID: 7923319
Filing Date: 2011-04-12
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor integrated circuit device, comprising the steps of: (a) forming a MISFET in a region in the vicinity of a first main surface of a semiconductor wafer, the MISFET having: (b) after the step (a), setting the semiconductor wafer over a first lower electrode in a first gas phase treatment chamber with the first main surface facing upward; (c) after the step (b), while the semiconductor wafer being set over the first lower electrode grounded with the first main surface facing upward, carrying out a plasma treatment on the first main surface under a first gas atmosphere which contains an inert gas as one of main components and which substantially does not contain hydrogen; and (d) after the step (c), while the semiconductor wafer being set over the first lower electrode with the first main surface facing upward, forming a silicon nitride film over the first main surface by a CVD treatment; (e) forming a silicon oxide film type premetal interlayer insulation film over the silicon nitride film; (f) opening a contact hole in the premetal interlayer insulation film with the silicon nitride film as an etching stop film; (g) after the step (f), etching the silicon nitride film, thereby to extend the contact hole to the top surface of the silicide film disposed over the source/drain regions; (h) after the step (g), setting the semiconductor wafer over a second lower electrode in a second gas phase treatment chamber with the first main surface facing upward; (i) after the step (h), while the semiconductor wafer being set over the second lower electrode grounded with the first main surface facing upward, carrying out a plasma treatment on the first main surface under a second gas atmosphere containing an inert gas as one of main components; (j) after the step (i), while the semiconductor wafer being set over the second lower electrode grounded with the first main surface facing upward, forming a barrier metal film over the inner surface of the contact hole; and (k) after the step (j), filling the contact hole with a metal containing tungsten as a main component.