Semiconductor device having optical fuse and electrical fuse

A semiconductor device comprising:

• an external terminal;
• a plurality of first chips each of which includes a plurality of memory cells;
• a second chip that communicates with outside of the semiconductor device through the external terminal and controls the plurality of first chips;
• and
• a plurality of internal wirings connected between the first chips and the second chip, each of the internal wirings including a plurality of through electrodes, each of the through electrodes penetrating through a corresponding one of the first chips, wherein
• the plurality of first chips communicates with the outside of the semiconductor device through the second chip without directly communicating with the outside,
• the second chip includes an electrical fuse, and
• each of the first chips further includes:
• an optical fuse;
• a first latch circuit that stores information on the optical fuse;
• a second latch circuit that stores information on the electrical fuse supplied from the second chip through the internal wirings;
• a select circuit that selects one of the information stored in the first and second latch circuits;
• and
• a first control circuit that generates a redundancy determination signal based on the information selected by the select circuit.