380 starts from the first vertical line v 1 along the first horizontal line h 1 and extends to the fourth vertical line v 4 the fifth conductive layer 375 the sixth conductive layer 376 the seventh conductive layer 377 the eighth conductive layer 378 the ninth conductive layer 379 and the tenth conductive layer 380 are tungsten or polysilicon the first conductive layer 371 is electrically connected to the first conductive plug 381 and the eighth conductive layer 378 is a fuse unit the third conductive layer 373 is electrically connected to the second conductive plug 382 and the ninth conductive layer 379 is a fuse unit the fourth conductive layer 374 is electrically connected to the third conductive plug 383 and the fifth conductive layer 375 is a fuse unit the second conductive layer 372 is electrically connected to the fourth conductive plug 384 and the sixth conductive layer 376 is a fuse unit the seventh conductive layer 377 is a fuse unit the tenth conductive layer 380 is a fuse unit the passivation layer is pe teos sio 2 or si 3 n 4 0026 fig3 a shows a fuse window 390 with a plurality of fuse structures fig3 a only shows one fuse structure each fuse structure comprises fuse unit 321 fuse unit 322 fuse unit 323 fuse unit 324 fuse unit 325 and.