256-Mb DRAM circuit technologies for file applications. - Goro Kitsukawa; Masashi Horiguchi; Yoshiki Kawajiri; Takayuki Kawahara; Takesada Akiba; Yasushi Kawase; Toshikazu Tachibana; Takeshi Sakai; Masakazu Aoki; Syoji Shukuri; Kazuhiko Sagara; Ryo Nagai; et al. (IEEE J. Solid State Circuits, 1993)