US Patent 11973024 Semiconductor memory device

A semiconductor memory device according to an embodiment includes a substrate, conductive layers, pillars, and contacts. The substrate includes first and second areas, and block areas. The conductive layers are divided for each of the block areas. The conductive layers includes terraced portions. The contacts are respectively provided on the terraced portions for each of the block areas. The second area includes a first sub area and a second sub area. The first sub area includes a first stepped structure. The second sub area includes a second stepped structure and a first pattern. The first pattern is continuous with any one of the conductive layers. The first pattern is arranged between the first stepped structure and the second stepped structure.