Patent ID: 7989956

Claim:
In a semiconductor device, an interconnect comprising: a plurality of segments, each segment comprising a first metal, a second metal, and a third metal, the second metal being different from the first metal, the third metal being different from the second metal and the first metal, the second metal being formed adjacent two side surfaces of the first metal and a bottom surface of the first metal, and contacting the two side surfaces and the bottom surface over an entire length of each respective segment, the third metal being formed on a top surface of the first metal, and contacting the top surface of the first metal and a portion of inner side surfaces of the second metal; and a plurality of barrier structures, each of the plurality of barrier structures being located between and in contact with two of the plurality of segments, where each of the plurality of barrier structures comprises a refractory metal, and where the plurality of segments and the plurality of barrier structures together form a continuously conductive interconnect.