| 摘要 |
PROBLEM TO BE SOLVED: To confirm correct writing of additional information for enhancing traceability easily and surely in a short time even if the volume of the additional information is increased. SOLUTION: The semiconductor integrated circuit device comprises parity check logic circuits 10a-10d, and fuse circuits 20-27 for writing additional information. The fuse circuits 20-27 are provided at a redundancy fuse repairing section 12 and written, as additional information, with a format code, the start year of wiring, a month code of wiring lot, the wiring lot number, the wiring lot number suffix, the wafer number, the chip address, and the trimming information. A parity bit is written in the least significant bit of the additional information and, at the time of shipment, the parity check logic circuits 10a-10d perform parity check of the additional information and only a semiconductor integrated circuit device 1 written with correct additional information is shipped.
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