Patent ID: 8101505
Filing Date: 2012-01-24
Classification: H01L

Abstract:
1. A method of forming a programmed electrical-fuse (e-fuse) device comprising: providing an e-fuse structure including a vertical stack, from bottom to top, of a first conductive layer, an insulating layer, and a second conductive layer, wherein said insulating layer embeds a conductive structure comprising a via including a conductive material and a barrier layer contacting a bottom surface of said via and laterally surrounding said via, and a section of said first conductive layer and said second conductive layer are separated by said conductive structure, an interface is provided between said section of said first conductive layer and a bottom surface of said barrier layer, and said barrier layer has a first diffusivity different than a second diffusivity of said first conductive layer; and programming said e-fuse structure by forming a void in said first conductive layer directly below said bottom surface of said barrier layer.