Semiconductor storage device

A semiconductor storage device comprising:

• a stacked body in which a plurality of first layers and a plurality of second layers are stacked alternately one on another;
• and
• a plurality of plate-like portions that penetrate through the stacked body in a stacking direction of the stacked body and extend in a first direction intersecting the stacking direction,
• wherein
• the plurality of first layers are formed of a first insulating material, and
• each of the plurality of second layers includes a first insulating area and an electrically conductive area,
• the first insulating area being arranged to extend from a first edge portion of the stacked body in the first direction so that the first insulating area occupies at least an area between a first edge portion of each of the plurality of plate-like portions extending in the first direction and the first edge portion of the stacked body in the first direction, the first insulating area being formed of a second insulating material, and
• the electrically conductive area being connected to the first insulating area in the first direction, and
• a boundary portion between the first insulating area and the electrically conductive area is located farther from the first edge portion of each of the plurality of plate-like portions along the first direction with respect to the first edge portion of the stacked body.