Patent ID: 8105935
Filing Date: 2012-01-31
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: forming a first insulating film over a semiconductor substrate; forming a trench in the first insulating film; forming a first metal interconnect including copper in the trench; exposing the upper surface of the metal interconnect to an organic type silane gas and siliconizing the upper surface of the metal interconnect; after exposing of the upper surface of the first metal interconnect to the organic type silane gas, performing a plasma treatment to the siliconized surface of the first metal interconnect to form a silicon-containing layer including silicon and copper in the upper surface of the first metal interconnect; after performing of the plasma treatment, forming a second insulating film on and in contact with the silicon-containing layer; and forming a second metal interconnect in the second insulating film and in contact with the upper surface of the first metal interconnect, wherein the plasma treatment is performed using at least one selected from a group consisting of nitrogen, hydrogen, dinitrogen monoxide, carbon dioxide, oxygen, and hydrocarbons.