Patent ID: 7785658
Filing Date: 2010-08-31
Classification: C23C,H01L

Abstract:
1. A method for forming a metal wiring structure including a metal-containing barrier layer, comprising, for producing the metal-containing barrier layer: (i) providing a multi-layer structure including an exposed wiring layer and an exposed insulating layer in a reaction space; (ii) introducing a terminal containing N at least on an exposed surface of the insulating layer in a reducing atmosphere; (iii) introducing a reducing compound to the reaction space to reduce the introduced terminal, and then purging a reaction space; (iv) introducing a metal halide compound to the reaction space to replace the introduced reducing compound, and then purging the reaction space; (v) introducing a gas containing N to provide a terminal containing N on a surface formed by the introduced metal halide, and then purging the reaction space; (vi) repeating steps (iii) to (v) in sequence to produce the metal-containing barrier layer; (vii) forming a metal film on the metal-containing barrier layer, said metal film comprising a metal other than a metal constituting the wiring layer; and (viii) forming a copper layer on the metal film; wherein the insulating layer is porous and has pores, said method further comprising, prior to step (ii), forming a pore-sealing layer to block pores at least on an exposed surface of the insulating layer; and removing a portion of the pore-sealing layer, if any, formed on an exposed surface of the wiring layer, wherein the exposed surface of the insulating layer in step (ii) on which the terminal containing N is introduced is comprised of a surface of the pore-sealing layer and the exposed surface of the wiring layer.