MEMORY MODULE USING A MEMORY DEVICE HAVING A DEFECT

摘要

PURPOSE: A memory module using a memory device having a defect is provided to reduce a manufacturing cost without affecting an operation or performance of the memory module, by reusing a product having the defect in data lines of the memory device for an error correction code(ECC). CONSTITUTION: A memory module using a memory device having a defect comprises a printed circuit board(PCB), four dynamic random access memory(DRAM) devices and a DRAM device for an error correction code(ECC). The PCB includes a pattern for forming a memory module and a pattern for processing eighty data lines. The four DRAM devices are mounted on the PCB, and form the memory module for inputting/outputting 64 real data. The DRAM device for the ECC is mounted on the PCB, using only 8 data lines out of 16 data lines. The DRAM device for the ECC uses the DRAM device having the defect in upper or lower 8 data lines out of the 16 data lines.