Patent ID: 7585764
Filing Date: 2009-09-08
Classification: H01L

Abstract:
1. A method of fabricating a device, comprising: forming a wiring layer in a substrate confined at least partially within a diffusion barrier material, wherein the diffusion barrier material comprises a base layer portion beneath the wiring layer and side layer portions adjacent the wiring layer; providing an insulator layer over the wiring layer and portions of the substrate; etching the insulator layer and the wiring layer to the base layer of the diffusion barrier material; depositing a electromigration (EM) resistive material in an etched trench formed in the substrate and the wiring layer, the EM resistive material being formed in electrical and physical contact with all of the base layer portion and in electrical and physical contact with the side layer portions of the diffusion barrier material and the wiring layer; and forming a via structure in electrical contact with the EM resistive material and the wiring layer.