Selector-line merged built-in ECC technique for DRAMs

A high-performance built-in error checking and correcting (ECC) technique applicable to megabit-level dynamic RAM (DRAM) chips is described. This technique, based on a bidirectional parity code, achieves high-speed error correction with a minimum increase in area. The impact of the technique on access time and chip overhead is discussed. Furthermore, effects on soft-error reduction and yield improvement are analytically investigated.