Patent ID: 11925024
Assignee: KIOXIA CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. The semiconductor memory device according to claim 1, wherein
the substrate has a fifth region and a sixth region arranged in the first direction, the fifth region is arranged with the first region in the second direction, and the sixth region is arranged with the second region in the second direction,
the semiconductor memory device comprising:
a plurality of third word line layers and a plurality of third interlayer insulating layers laminated in the third direction,
each of the plurality of third word line layers including a fifth word line part provided over the fifth region and a sixth word line part provided over the sixth region,
each of the plurality of third interlayer insulating layers including a seventh interlayer insulating part provided over the fifth region and an eighth interlayer insulating part provided over the sixth region,
all seventh interlayer insulating parts of the plurality of third interlayer insulating layers being laminated in the third direction alternately with all fifth word line parts of the plurality of third word line layers, and
all eighth interlayer insulating parts of the plurality of third interlayer insulating layers being laminated in the third direction alternately with all sixth word line parts of the plurality of third word line layers;

a third semiconductor layer that is provided over the fifth region and extends in the third direction, the third semiconductor layer having an outer peripheral surface opposed all fifth word line parts of the plurality of third word line layers;
a third electric charge accumulating film provided over the fifth region and disposed between all fifth word line parts of the plurality of third word line layers and the third semiconductor layer; and
a third contact that extends in the third direction, the third contact being connected to one of the sixth word line parts of the plurality of third word line layers at one end in the third direction;
the one of the sixth word line parts of the plurality of third word line layers is electrically connected to the first contact via the third contact.