Patent Number: 8,872,258

Title: Semiconductor memory device

Abstract: A semiconductor memory device includes: a sense amplifier; a plurality of memory cell arrays; a shared MOS transistor that connects/disconnects the sense amplifier and a bit line included in the memory cell arrays; and a control circuit that controls operation of the shared MOS transistor. A part or whole of an in-sense-amplifier bit line that is a bit line connecting the sense amplifier and the shared MOS transistor is embedded in a semiconductor substrate.

Inventors: Yoshida; Soichiro (Tokyo, JP), Yanagawa; Yoshimitsu (Tokyo, JP), Sekiguchi; Tomonori (Tokyo, JP), Kotabe; Akira (Tokyo, JP)

Assignee: PS4 Luxco S.A.R.L.

International Classification: H01L 29/66 (20060101)

Expiration Date: 2018-10-28 0:00:00