Patent ID: 7772103

Claim:
A method of forming a wire structure, comprising: forming first active regions on a substrate, each of the first active region including a first sidewall having a positive slope and a second sidewall disposed opposite to the first sidewall; forming second active regions arranged on the substrate along a first direction; forming an isolation layer on the substrate between the first and the second active regions; forming a first mask on the first active regions, the second active regions and the isolation layer, the first mask having an opening exposing the first sidewall of the first active region and extending along the first direction; partially etching the first active regions, the second active regions and the isolation layer using the first mask to form a groove extending along the first direction and to form a fence from a portion of the first sidewall, the fence having a height substantially higher than a bottom surface of the groove; forming a wire filling the groove; and forming a contact on the wire, the contact being disposed toward the second active regions farthest from the fence.