This invention relates to a fuse structure of semiconductor elements including a fuse layer between up and down insulation layers on a semiconductor base electrically connected with other metal layers with the help of dielectric layer holes, the resistivity of the fuse layer can be adjusted according to its material, the fuse layer has many mutual separated blocks, at least one connection block and a thermal buffer block, which is coupled to blocks close to the burning point or blocks with the burning point to provide a new heat conduction path. When a connection block with narrow area is overheat since the current density passing it is high, a thermal buffer block and blocks connected with it can distribute the heat generated near it uniformly and good for radiation. |