| 摘要 |
PURPOSE:To relieve a defective cell by replacing an input/output signal line having a defective cell into an input/output signal line of a memory area not in use in a device using a small memory area in use in memory devices having two kinds or over of operating areas in one and same chip. CONSTITUTION:In connecting pads P1-P9 and leads L1-L9, the lead L2 of the pad P2 is not connected in the operating memory area M2 where a defective cell exists and the memory area B not in use is replaced. Thus, the defective cell is switched by the input/output line at each memory area while the area not in use is utilized effectively to relieve the defective cell simple.
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