US Patent 11876048 Memory device and method of manufacturing the same

Provided is a memory device, including: a substrate; a plurality of word lines, extending in a first direction, arranged in a second direction, disposed on the substrate; a dummy structure, adjacent to ends of the word lines, disposed on the substrate, wherein the dummy structure includes a main part that extends in the second direction; and a plurality of extension parts, extending in the first direction, connected to the main part, and interposed between the main part and the word lines.