Patent ID: 6831349
Filing Date: 2004-12-14
Classification: H01L

Abstract:
A top-metal fuse structure and an RDL/bump/bonding pad structure, comprising:a structure having an overlying intermetal dielectric layer; the structure including a fuse region and an RDL/bump/bonding pad region; a top-metal fuse structure over the intermetal dielectric layer within the fuse region; the top-metal fuse structure having: a patterned lower first metal layer fuse portion over the intermetal dielectric layer; and a patterned second metal layer fuse portion centered over the lower first metal layer fuse portion; the patterned lower first metal layer fuse portion and the patterned second metal layer fuse portion each having equal widths; and an RDL/bump/bonding pad structure over the intermetal dielectric layer within the RDL/bump/bonding region; the RDL/bump/bonding pad structure having: a patterned lower first metal layer non-fuse portion over the intermetal dielectric layer, the patterned lower first metal layer non-fuse portion having a first width; a patterned second metal layer non-fuse portion centered over the lower first metal layer non-fuse portion, the patterned second metal layer non-fuse portion having a second lower width equal to the first width of the patterned lower first metal layer non-fuse portion and a second upper width less than the first width of the patterned lower first metal layer non-fuse portion; and a patterned upper first metal layer non-fuse portion centered over the patterned second metal layer non-fuse portion, the patterned upper first metal layer non-fuse portion having a third width less than the second lower width of the patterned second metal layer non-fuse portion whereby a step profile is formed at least as between the patterned upper first metal layer non-fuse portion and the patterned second metal layer lower width non-fuse portion.