Patent ID: 9177857
Filing Date: 2015-11-03
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate; an insulator film formed over the substrate; a plurality of metal wirings with different widths in a first direction which are formed in the insulator film, contains copper as a main component, and contains an impurity metal which is different from copper, the metal wiring having a thickness in a second direction perpendicular to the first direction, wherein the plurality of metal wirings includes: a first metal wiring with a concentration profile in the second direction in which the concentration of the impurity metal increases, in the second direction, from a center part of the first metal wiring to an upper surface of the first metal wiring; and a second metal wiring with a concentration profile of the second direction in which the concentration of the impurity metal decreases, in the second direction, from a bottom surface of the second metal wiring to an upper surface of the second metal wiring, and wherein the width of the second metal wiring is larger than the width of the first metal wiring, and the first metal wiring has a minimum wiring pitch in the semiconductor device.