Non-volatile memory device having vertical structure and method of operating the same
First Claim
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1. A semiconductor device comprising:
- a substrate;
a first ground select electrode on the substrate;
a second ground select electrode on the first ground select electrode;
a plurality of cell electrodes on the second ground select electrode;
a first string select electrode on the plurality of cell electrodes;
a second string select electrode on the first string select electrode;
a string selection line connected to the first string select electrode with a first string select contact plug and connected to the second string select electrode with a second string select contact plug; and
a ground selection line connected to the first ground select electrode with a first ground select contact plug and connected to the second ground select electrode with a second ground select contact plug,wherein a vertical length of the first string select contact plug is different from a vertical length of the second string select contact plug, and a vertical length of the first ground select contact plug is different from a vertical length of the second ground select contact plug.
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Abstract
A non-volatile memory device having a vertical structure includes a NAND string having a vertical structure. The NAND string includes a plurality of memory cells, and at least one pair of first selection transistors arranged to be adjacent to a first end of the plurality of memory cells. A plurality of word lines are coupled to the plurality of memory cells of the NAND string. A first selection line is commonly connected to the at least one pair of first selection transistors of the NAND string.
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Citations
8 Claims
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1. A semiconductor device comprising:
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a substrate; a first ground select electrode on the substrate; a second ground select electrode on the first ground select electrode; a plurality of cell electrodes on the second ground select electrode; a first string select electrode on the plurality of cell electrodes; a second string select electrode on the first string select electrode; a string selection line connected to the first string select electrode with a first string select contact plug and connected to the second string select electrode with a second string select contact plug; and a ground selection line connected to the first ground select electrode with a first ground select contact plug and connected to the second ground select electrode with a second ground select contact plug, wherein a vertical length of the first string select contact plug is different from a vertical length of the second string select contact plug, and a vertical length of the first ground select contact plug is different from a vertical length of the second ground select contact plug. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification