LASER ALIGNMENT MONITORING FUSE STRUCTURE AND SEMICONDUCTOR DEVICE HAVING THE SAME AND LASER ALIGNMENT MONITORING CIRCUIT

摘要

A laser alignment monitoring fuse structure, a semiconductor device having the same, and a laser alignment monitoring circuit are provided to prevent cutting defects and a pitch decrease of a fuse arranged in a fuse box by arranging a monitoring fuse in a signature fuse box. A memory cell block(61) has a plurality of memory cells. A redundancy memory cell block(62) has a multiplicity of memory cells. Plural input pads provide address signals and command signals to the memory cell block and the redundancy memory cell block. A fuse box(63) has a plurality of first fuses having a first width and being cut by a laser, thereby repairing memory cells having defects with the memory cells of the redundancy memory cell block. A signature fuse box(64) has plural second fuses and stores information of a semiconductor device according to a cutting of the second fuses. A monitoring fuse is arranged on the signature box for monitoring an alignment of the laser for cutting the first fuse in the fuse box.