Semiconductor device having optical fuse and electrical fuse

摘要

A semiconductor device includes a plurality of first chips, a second chip that controls the first chips, and internal wiring that connects the first chips and the second chip. The first chips each include: an optical fuse; a first latch circuit that retains information on the optical fuse; a second latch circuit that retains information on an electrical fuse, the information being supplied from the second chip through the internal wiring; and a select circuit that selects the information retained in either one of the first and second latch circuits. A redundancy determination signal is generated from the information selected. The information on the electrical fuse is transferred from the second chip to the first chips through the internal wiring.