公开(公告)号：US12080374B2

公开(公告)日：2024-09-03

申请号：US17898888

申请日：2022-08-30

Applicant: KIOXIA CORPORATION

Inventor： Masaki Fujiu ,  Hitoshi Shiga

IPC: G11C7/06 ,  G11C7/12 ,  G11C7/22

CPC classification number: G11C7/065 ,  G11C7/12 ,  G11C7/222

Abstract: A semiconductor storage device includes a memory string, a sense amplifier connected to the memory string, first, second, third, and fourth latch circuits that are each connected to the sense amplifier, a first wiring connected to the sense amplifier, the first latch circuit and the second latch circuit, a second wiring connected to the third latch circuit, a third wiring connected to the fourth latch circuit, a first switch transistor between the first wiring and the third wiring, a second switch transistor between the first wiring and the second wiring, and a third switch transistor between the second wiring and the third wiring.

公开(公告)号：US11158385B2

公开(公告)日：2021-10-26

申请号：US16841377

申请日：2020-04-06

Applicant: KIOXIA CORPORATION

Inventor： Koji Kato ,  Hitoshi Shiga

IPC: G11C16/26 ,  H01L27/1157 ,  G11C16/14 ,  G11C16/08 ,  G11C16/24 ,  G11C16/34 ,  G11C8/10 ,  G11C16/10 ,  G11C8/08 ,  G11C16/32 ,  H01L27/11582 ,  G11C16/04

Abstract: A semiconductor memory device includes a block decoder having a sense node, and a control unit. The block decoder includes first and second transistors each connected between a first node and ground, a third transistor connected between a power source voltage and a second node, a fourth transistor connected between the first and second nodes and controlled by the same gate signal as the third transistor, a fifth transistor having a first terminal connected to the sense node and a gate connected to the second node through an inverter, and a latch circuit that switches the first transistor on and off according to its setting. The control unit determines the setting of the latch circuit, according to a logic level based on a voltage of the sense node during an operation in which the second and third transistors are turned off and the fourth transistor is turned on.