Patent ID: 7701060

Claim:
A wiring structure wherein the wiring structure is so constituted that, in a wiring structure of multi-layered wiring in which a plurality of unit wiring structures are laminated, the unit wiring structure having at least one metal wiring and at least one metal connection plug formed by filling the metal into a wiring trench and a via hole formed in an insulation film on a substrate forming a semiconductor element, at least one of the unit wiring structures includes an insulation barrier layer with organic substance inserted between at least one of the metal wiring and the metal connection plug, and an interlayer insulation film, at least a portion of a side surface of at least one of the metal wiring and the metal connection plug being overlaid by the insulation barrier layer; wherein an interlayer insulation film in which a first insulation film, a third insulation film, a porous insulation film and a second insulation film are laminated in series, is formed on the metal wiring, a side surface of a wiring trench formed through at least the second insulation film and the porous insulation film, and a side surface of a via hole formed through the third insulation film being overlaid by the insulation barrier layer including the organic substance, and carbon content of the organic substance being larger than that of the first insulation film and the second insulation film, wherein the insulation barrier layer including the organic substance is made of a film of Divinyl Siloxane Benzo Cyclobutene, the first insulation film is made of a SiCN film, the second insulation film is made of a SiO 2 film, the porous insulation film is made of a porous SiOCH film, and the third insulation film is made of a porous SiOCH film.