Kioxia Corporation

Akira Yotsumoto

Osamu Matsuura

Hisashi Kato

Kazuhiro Nojima

Daigo Ichinose

Shoichi Miyazaki

Keisuke Suda

Yu Hirotsu

Tetsuya Yamashita

Kenji Tashiro

Kanako Shiga

Mitsunori Masaki

According to one embodiment, a semiconductor memory device includes: a stacked body having a stacked structure in which a plurality of conductive layers and a plurality of insulating layers are alternately stacked one by one, the stacked body including a memory region and a dummy region arranged in a first direction intersecting a stacking direction of the plurality of conductive layers, the dummy region including a first stepped portion in which at least a part of the plurality of conductive layers on an upper layer side is processed in a stepped shape and terminates at an end portion opposite to the memory region in the first direction; and first and second plate-like portions extending in the stacking direction and the first direction in the stacked body at positions in the memory region away from each other in a second direction intersecting the stacking direction and the first direction, the first and second plate-like portions being directly or indirectly connected to each other and terminating in the dummy region, each of the first and second plate-like portions dividing the stacked body excluding at least a part of the end portion of the dummy region in the second direction.

Semiconductor memory device

Semiconductor memory device includes: a first and second member each extending in a first direction in a boundary part between a first and second block region and arranged in the first direction; a support pillar arranged between the first and second member at the boundary part; conductive layers separated from one another and arranged in a third direction and split by the first and second member, and the support pillar into a first and second portion; and a memory pillar penetrating through the conductive layers. The support pillar includes a lower and upper pillar. A side face of the lower pillar and an extension of a side face of the upper pillar are displaced from each other in a plane based on a second and the third direction.

Growing community of inventors

Yokkaichi, Japan

Akira Yotsumoto