Patent ID: 6103624
Filing Date: 2000-08-15
Classification: H01L

Abstract:
A method of producing semiconductor device interconnects on a semiconductor wafer, comprising having a plurality of semiconductor devices the steps of:creating a dielectric layer on the semiconductor wafer;creating a plurality of trenches in the dielectric layer;depositing a barrier metal layer on the dielectric layer, so that part of the barrier metal layer is inside of the plurality of trenches and lines the insides of the plurality of trenches in the dielectric layer and part of the barrier metal layer is not inside the plurality of trenches;depositing a copper layer on the barrier metal layer, so that parts of the copper layer are inside the plurality of trenches and fill the insides of the plurality of trenches in the dielectric layer and parts of the copper layer are not inside the plurality of trenches;removing that parts of the copper layer that are not inside the plurality of trenches, while leaving the barrier metal layer inside and not inside of the plurality of trenches;annealing the copper layer; andremoving that part of the barrier metal layer that is not inside the plurality of trenches.