Patent ID: 6638796
Filing Date: 2003-10-28
Classification: H01L

Abstract:
A method of forming a top-metal fuse structure, comprising the steps of:providing a structure having an intermetal dielectric layer formed thereover; the structure including a fuse region and an RDL/bump/bonding pad region; forming a composite metal layer over the intermetal dielectric layer; the composite metal layer including a second metal layer sandwiched between upper and lower first metal layers; patterning the upper first metal layer to form an upper metal layer portion within the RDL/bump/bonding pad region; and patterning the second metal layer and the lower first metal layer: within the RDL/bump/bonding pad region to form an RDL/bump/bonding pad; the RDL/bump/bonding pad having a patterned second metal layer portion /lower first metal portion with a width greater than that of the upper metal layer portion and forming a step profile; and within the fuse region to form the top-metal fuse structure.