Patent ID: 7566593
Filing Date: 2009-07-28
Classification: H01L

Abstract:
1. A method for forming a fuse structure comprising: forming a laminated structure comprising a substrate layer, a sacrificial layer formed upon the substrate layer, a fuse material layer formed upon the sacrificial layer and a capping layer formed aligned upon the fuse material layer; masking a pair of ends of the fuse material layer; etching the sacrificial layer to form a pair of sacrificial layer pedestals at the pair of ends of the fuse material layer, said etching the sacrificial layer uses the capping layer and the fuse material layer as a self aligned mask; unmasking the pair of ends of the fuse material layer; forming an encapsulating dielectric layer over the fuse material layer and the sacrificial layer pedestals to form a cavity interposed between the fuse material layer and the substrate layer, said forming an encapsulating dielectric layer does not form a cavity on a side of the fuse material layer opposite the substrate layer.