Disclosed are a multi-bit non-volatile memory device, a method of operating the same, and a method of manufacturing the multi-bit non-volatile memory device. A unit cell of the multi-bit non-volatile memory device may be formed on a semiconductor substrate may include: a plurality of channels disposed perpendicularly to the upper surface of the semiconductor substrate; a plurality of storage nodes disposed on opposite sides of the channels perpendicularly the upper surface of the semiconductor substrate; a control gate surrounding upper portions of the channels and the storage nodes, and side surfaces of the storage nodes; and an insulating film formed between the channels and the storage nodes, between the channels and the control gate, and between the storage nodes and the control gate.

 
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