Storage device, method for manufacturing the same, and electronic device including storage device

A storage device, comprising:

• a substrate;
• a plurality of word lines extending in a first direction on the substrate;
• a plurality of bit lines extending in a second direction perpendicular to the first direction on the substrate;
• and
• a storage unit array disposed on the substrate, wherein the storage unit array comprises a plurality of storage units, each of which is electrically connected to a respective one of the plurality of word lines and a respective one of the plurality of bit lines,
• wherein each of the storage units comprises:
• an active region, wherein the active region extends in a third direction inclined with respect to the first direction and comprises a vertical stack of a first source/drain layer, a channel layer and a second source/drain layer;
• and
• gate stacks between the first source/drain layer and the second source/drain layer in a vertical direction, wherein the gate stacks are disposed on opposite sides of the channel layer in a fourth direction orthogonal to the third direction, so as to sandwich the channel layer,
• wherein a respective word line corresponding to each storage unit extends across the storage unit in the first direction to be in contact with and electrically connected to the gate stacks on opposite sides of the storage unit, and
• wherein the first direction, the second direction and the third direction are parallel to a same plane.