Patent ID: 11917827
Assignee: KIOXIA CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor memory device comprising:
a substrate;
a stacked body including a plurality of electrode members and a plurality of insulating members, each of the electrode members and each of the insulating members being stacked alternately in a first direction above the substrate;
a memory hole that extends in the stacked body in the first direction;
a first insulating member that is disposed to extend in the memory hole in the first direction;
a semiconductor member that is disposed between the stacked body and the first insulating member to extend in the first direction;
a charge storage member that is disposed between the semiconductor member and one of the plurality of electrode members; and
a second insulating member that is disposed between the semiconductor member and the charge storage member, the second insulating member including nitride, wherein
the plurality of electrode members includes a first electrode member and a second electrode member, the first electrode member and the second electrode member being arranged in the first direction,
a diameter of the memory hole at a position of the second electrode member is larger than a diameter of the memory hole at a position of the first electrode member in a second direction orthogonal to the first direction,
a thickness of the charge storage member at the position of the second electrode member is greater than a thickness of the charge storage member at the position of the first electrode member in the second direction, and
a thickness of the second insulating member at the position of the first electrode member is greater than a thickness of the second insulating member at the position of the second electrode member in the second direction.