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US 8,508,975 B2Granted
Resistive storage-based semiconductor memory device
AssigneeKabushiki Kaisha Toshiba
InventorsTakayuki Toba, Hiroyuki Nitta
Life of this patent
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Abstract
A semiconductor memory device includes a control circuit. The control circuit applies a first voltage to a selected one of a upper interconnections, applies a second voltage to an unselected one of the upper interconnections, applies a third voltage to a first dummy upper interconnection and independently controls the first to third voltages to be set to different values.
Claims17
A resistive storage-based semiconductor memory device comprising:
- a plurality of upper interconnections;
- a plurality of lower interconnections;
- a first dummy upper interconnection with line width larger than that of the upper interconnection;
- memory cells arranged in intersecting positions between the upper interconnections and the lower interconnections;
- first dummy cells arranged in intersecting positions between the first dummy upper interconnection and the lower interconnections;
- and
- a control circuit that applies a first voltage to a selected one of the upper interconnections, applies a second voltage to an unselected one of the upper interconnections, applies a third voltage to the first dummy upper interconnection and independently controls the first to third voltages to be set to different values.
4 more elements
A resistive storage-based semiconductor memory device comprising:
- a plurality of upper interconnections;
- a plurality of lower interconnections;
- a first dummy upper interconnection arranged in a same level as the upper interconnections and having line width larger than that of the upper interconnection;
- memory cells arranged in intersecting positions between the upper interconnections and the lower interconnections, the memory cells being laminated in a direction perpendicular to a substrate surface of a semiconductor substrate into a 3-dimensional structure by alternately laminating the plural upper interconnections and plural lower interconnections;
- first dummy cells arranged in intersecting positions between the first dummy upper interconnection and the lower interconnections;
- and
- a control circuit that applies a first voltage to a selected one of the upper interconnections, applies a second voltage to an unselected one of the upper interconnections, applies a third voltage to the first dummy upper interconnection and independently controls the first to third voltages to be set to different values.
4 more elements
Dependencies are inferred from the claim text.