| 摘要 |
A first repair chip, wherein BANK 2 functions properly although BANKs 0, 1 and 3 have become defective, and a second repair chip, wherein BANKs 1, 2 and 3 function properly although BANK 0 has become defective, are mounted on a rear surface of a module substrate in order to substitute for the functions of BANK 2 of the first bare chip and of BANKs 1 and 2 of the second bare chip that have become defective on the front surface of the module substrate. Thereby, a semiconductor memory module is obtained that can be repaired by mounting chips that carry out functions substituting for those of defective banks while effectively utilizing the functions of other banks that are not defective.
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