Patent ID: 8159038
Filing Date: 2012-04-17
Classification: H01L

Abstract:
1. A semiconductor device comprising: an active area disposed in a semiconductor body; an isolation region surrounding the active area and disposed in the semiconductor body; an electrode disposed over the active area; a liner disposed over the electrode and the active area; an insulating layer disposed over the liner; a first contact plug disposed in the insulating layer and the liner, the first contact plug disposed above and in contact with a portion of the active area, the first contact plug comprising a first conductive material, wherein the electrode comprises a second conductive material disposed over the active area and a third conductive material disposed over the second conductive material, and wherein the electrode comprises a fourth conductive material disposed between the second conductive material and the third conductive material, and where the third conductive material comprises a silicide diffusion barrier material; a second contact plug disposed in the insulating layer and the liner, the second contact plug disposed above and in contact with a portion of the electrode, the second contact plug comprising the first conductive material, wherein the portion of the electrode in contact with the second contact plug is disposed directly above a portion of the isolation region; and a contact material layer disposed in the active area, the contact material layer disposed under the first contact plug, wherein the contact material layer comprises the first conductive material.