Importance

Loading Importance Indicators...

Abstract

A semiconductor having multi-layer metalization which has a metal layer between aluminum alloy and metal nitride layers, that prevents failure of interconnects when electromigration causes a discontinuity in the aluminum alloy layer. In a one embodiment, the metal of the metal layer and the metal of the nitride layer are both the same metal, such as titanium. In a method of manufacturing the semiconductor device, an insulating layer is formed on a surface of a semiconductor substrate, and in vacuum chambers, the alloy layer is-formed on the insulating layer, a metal layer is formed on the alloy layer, and a metal nitride layer is formed on the metal layer in an nitrogen atmosphere. Sputtering, such as RF-bias sputtering, or thermal evaporation deposition, may be used to apply the respective nitride, metal and alloy layers. If the same metal is used for the metal layer and the nitride layer, the same vacuum chamber may be used to apply both layers, by replacing an inert gas atmosphere used during metal layer deposition by a nitrogen gas atmosphere for use during the nitride layer deposition.

Loading the Abstract Image...

First Claim