Patent ID: 11956957
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: nan (nan)
Classification: CPC H | IPC H

Claim 13:
14. A semiconductor memory device comprising:
a first stacked structure on a substrate, the first stacked structure including first gate electrodes stacked in a first direction;
a first supporter layer on the first stacked structure;
a second stacked structure on the first stacked structure, the second stacked structure including second gate electrodes stacked in the first direction;
a plurality of first sub-cut structures cutting the first stacked structure and the second stacked structure and arranged in a second direction intersecting the first direction;
a second sub-cut structure between the first sub-cut structures, the first sub-cut structures being spaced apart from each other in the second direction and being among the plurality of first sub-cut structures, the second sub-cut structure cutting the second stacked structure;
a channel structure which including lower channel structure penetrating the first stacked structure and an upper channel structure penetrating the first supporter layer and the second stacked structure, wherein side walls of the channel structure have a step; and
a second supporter layer on the second stacked structure,
wherein the first supporter layer includes a first cut pattern through which the plurality of first sub-cut structures penetrates, the first cut pattern includes a first connection between the first sub-cut structures,
the second supporter layer includes a second cut pattern which exposes at least a part of upper faces of the plurality of first sub-cut structures and exposes the second sub-cut structure, the second cut pattern includes a second connection on the second sub-cut structure,
an area of the first cut pattern is different from an area of the second cut pattern, and
a ratio of an area of the first connection to an area of the first supporter layer is different than a ratio of an area of the second connection to an area of the second supporter layer.