Patent ID: 11881283
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 11:
12. A semiconductor memory device comprising:
first and second memory cell arrays spaced apart from each other in a first direction;
a central bitline of a plurality of bitlines that extends in the first direction over the first memory cell array, wherein the central bitline is a closest one of the plurality of bitlines to a center line that extends in the first direction at a center of the first memory cell array;
a first outer bitline of the plurality of bitlines, wherein the first outer bitline extends in the first direction over the first memory cell array and is a farthest one of the plurality of bitlines from the center line in a second direction which intersects the first direction;
a second outer bitline of the plurality of bitlines, wherein the second outer bitline extends in the first direction over the first memory cell array and is a farthest one of the plurality of bitlines from the first outer bitline in the second direction;
central column selection transistors configured to control electric potential between the central bitline and a local sense amplifier;
a first outer column selection transistor configured to control electric potential between the first outer bitline and the local sense amplifier; and
a second outer column selection transistor configured to control electric potential between the second outer bitline and the local sense amplifier,
wherein the first and second outer column selection transistors are configured to provide electric potential to the local sense amplifier while the central column selection transistors are providing electric potential to the local sense amplifier, and
wherein the central column selection transistors comprise first and second central column selection transistors which each comprises respective portions of a central gate pattern that intersects the center line and has a closed loop shape.