US Patent 10367054 Semiconductor memory device

A semiconductor memory device according to an embodiment comprises a plurality of control gate electrodes, a first semiconductor layer, and a gate insulating layer. The plurality of control gate electrodes are arranged in a first direction that intersects a surface of a substrate. The first semiconductor layer extends in the first direction and faces side surfaces in a second direction intersecting the first direction, of the plurality of control gate electrodes. The gate insulating layer is provided between the control gate electrode and the first semiconductor layer. In addition, the first semiconductor layer includes: a first portion having a first plane orientation; and a second portion having a second plane orientation which is different from the first plane orientation.