发明名称 |
SEMICONDUCTOR MEMORY DEVICE |
摘要 |
A semiconductor memory device according to an embodiment comprises: a memory cell array, the memory cell array including: an inter-layer insulating layer and a conductive layer stacked in a stacking direction; a columnar semiconductor layer having a side surface that faces side surfaces of the inter-layer insulating layer and the conductive layer and extending in the stacking direction; and a block insulating layer and a block high-permittivity layer disposed between the columnar semiconductor layer and the conductive layer, the block insulating layer including: a first block insulating film that covers a side surface of the columnar semiconductor layer from a lower surface of the inter-layer insulating layer to an upper surface of the conductive layer in the stacking direction; and a second block insulating film that contacts the first block insulating film and covers at least a side surface and a lower surface of the conductive layer. |
申请公布号 |
US2016268266(A1) |
申请公布日期 |
2016.09.15 |
申请号 |
US201514729544 |
申请日期 |
2015.06.03 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
NODA Kotaro;NODA Kyoko |
分类号 |
H01L27/115 |
主分类号 |
H01L27/115 |
代理机构 |
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代理人 |
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主权项 |
1. A semiconductor memory device, comprising:
a memory cell array, the memory cell array including: an inter-layer insulating layer stacked on a semiconductor substrate; a conductive layer stacked on the inter-layer insulating layer; a columnar semiconductor layer having a side surface that faces side surfaces of the inter-layer insulating layer and the conductive layer and extending in a stacking direction of the inter-layer insulating layer and the conductive layer; and a block insulating layer and a block high-permittivity layer disposed between the columnar semiconductor layer and the conductive layer, the block insulating layer including: a first block insulating film that covers a side surface of the columnar semiconductor layer at least from a lower surface of the inter-layer insulating layer to an upper surface of the conductive layer in the stacking direction; and a second block insulating film that contacts the first block insulating film and covers at least a side surface and a lower surface of the conductive layer. |
地址 |
Minato-ku JP |