Patent ID: 7126222

Claim:
A semiconductor device comprising: a first insulating layer; a first interconnection material formed in a first groove within the first insulating layer, the first groove extending in a first direction and having a first width in a second direction that is substantially perpendicular with the first direction; a second insulating layer formed on the first insulating layer; a barrier layer formed in a second groove within the second insulating layer, the barrier layer extending from over an upper surface of the first interconnection material in the first insulating layer to at least one outer sidewall surface of the first interconnection material, wherein the second groove has an interconnection portion having a first length in the second direction and a contact portion formed between the interconnection portion and the first interconnection material, and wherein the contact portion has a second width in the second direction that is smaller than the first length and larger than the first width; and a second interconnection material formed on the barrier layer, the second interconnection material thereby extending from over the upper surface of the first interconnection material in the first insulating layer onto the at least one outer sidewall surface of the first interconnection material via the barrier layer.