Patent ID: 7119439

Claim:
A semiconductor device, comprising: a semiconductor substrate; and a moisture-proof ring structure including a first interlayer insulation film formed above said semiconductor substrate; a first conductor pattern formed in said first interlayer insulation film; a first barrier metal film formed between said first interlayer insulation film and said first conductor pattern to cover at least side faces of said first conductor pattern; a second interlayer insulation film formed on said first interlayer insulation film; a second conductor pattern formed above said first conductor pattern with said second interlayer insulation film intervening therebetween; a via contact portion formed in said second interlayer insulation film to connect said first conductor pattern to said second conductor pattern; and a second barrier metal film formed to cover side faces and a bottom face of said via contact portion, wherein said moisture-proof ring structure is formed to continuously extend such that a bottom face portion of said second barrier metal film, covering the bottom face of said via contact portion, of said second barrier metal film, is in contact with at least a portion of an upper end portion of said first barrier metal film, and wherein a side face of said second barrier metal film is formed at a position offset from a side face of said first barrier metal film to the outside of said semiconductor device.