Patent ID: 11956961
Assignee: KIOXIA CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A method of manufacturing a semiconductor memory device, the method comprising:
forming a first stacked body including a plurality of first insulating layers and a plurality of second insulating layers alternately stacked in a first direction intersecting a surface of a substrate;
forming a third insulating layer on the first stacked body;
forming a second stacked body including a plurality of fourth insulating layers and a plurality of fifth insulating layers alternately stacked in the first direction on the third insulating layer; and
forming a tubular body penetrating the first stacked body, the third insulating layer, and the second stacked body, the tubular body comprising a tubular semiconductor layer extending in the first direction and a tubular charge storage layer extending in the first direction and arranged between the plurality of second insulating layers and the tubular semiconductor layer and between the plurality of fifth insulating layers and the tubular semiconductor layer;
wherein the forming the tubular body comprises;
forming a memory hole that penetrates the first stacked body, the third insulating layer, and the second stacked body,
forming a semiconductor layer on a side surface and a bottom surface of the memory hole,
performing plasma treatment on an inner wall of the semiconductor layer,
forming a protective film on a part of the inner wall of the semiconductor layer after performing plasma treatment, and
etching at least a part of the inner wall of the semiconductor layer and the protective film after forming the protective film.