Patent ID: 11889777
Assignee: KIOXIA CORPORATION
Field: nan (nan)
Classification: CPC H | IPC H

Claim 16:
17. A semiconductor memory device comprising:
a substrate;
a first wiring disposed above the substrate and extending in a first direction;
a second wiring disposed between the substrate and the first wiring and extending in a second direction crossing the first direction;
a third wiring being adjacent to the second wiring in a third direction crossing the first and second directions, and the third wiring being electrically connected to the second wiring and extending in the second direction;
a fourth wiring disposed between the substrate and the third wiring and extending in the first direction;
a fifth wiring being adjacent to the fourth wiring in the third direction, being electrically connected to the fourth wiring, and extending in the first direction;
a sixth wiring disposed between the substrate and the fifth wiring and extending in the second direction;
a seventh wiring disposed between the substrate and the sixth wiring and extending in the first direction;
an eighth wiring disposed between the seventh wiring and substrate;
a transistor disposed on the substrate;
a first memory cell disposed between the first wiring and the second wiring;
a second memory cell disposed between the third wiring and the fourth wiring;
a third memory cell disposed between the fifth wiring and the sixth wiring;
a fourth memory cell disposed between the sixth wiring and the seventh wiring;
a first contact disposed between the first wiring and the seventh wiring, the first contact extending in the third direction and being electrically connected to the first wiring and the seventh wiring;
a second contact disposed between the first contact and the seventh wiring, the second contact extending in the third direction and including one end portion connecting the first contact and another end portion opposite to the one end portion in the third direction;
a third contact disposed between the second contact and the seventh wiring, the third contact extending in the third direction and being electrically connected to the first wiring and the seventh wiring;
a fourth contact being electrically connected to the seventh wiring and the eighth wiring;
a fifth contact being electrically connected to the fifth wiring and extending in the third direction; and
a sixth contact being connected to the fifth contact and extending in the third direction, wherein the third wiring and the fourth wiring are disposed between the one end portion of the second contact and the another end portion of the second contact in the third direction.