Patent ID: 11943916
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A semiconductor device comprising:
a substrate comprising a cell area and a connection area;
a source line on the substrate;
a stack structure comprising a plurality of mold layers and a plurality of horizontal conductive layers, which are alternately stacked on the source line;
a channel structure vertically extending through the stack structure on the cell area and extending into the source line;
a pillar structure vertically extending through the stack structure on the connection area and extending into the source line; and
a plurality of contact plugs disposed on the connection area, each contact plug being connected to a corresponding one of the plurality of horizontal conductive layers,
wherein each of the plurality of horizontal conductive layers comprises a gate electrode, and a connecting pad in continuity with the gate electrode,
wherein the pillar structure comprises a pillar extending through the plurality of horizontal conductive layers, and a plurality of pillar extensions protruding from a side surface of the pillar,
wherein the plurality of the pillar extensions comprise an uppermost extension and other pillar extensions,
wherein outer side surfaces of the other pillar extensions further protrude beyond bean outer side surface of the uppermost pillar extension,
wherein the plurality of pillar extensions include a first pillar extension which is in continuity with the pillar, and is formed of a same material layer as the pillar,
wherein each of the plurality of pillar extensions is horizontally aligned with a corresponding one of the plurality of horizontal conductive layers,
wherein the channel structure vertically extends through a plurality of gate electrodes of the plurality of horizontal conductive layers,
wherein each of the plurality of contact plugs contacts a connecting pad of a corresponding one of the plurality of horizontal conductive layers, and
wherein the stack structure is disposed on the cell area and extends into the connection area.