Patent ID: 11963358
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A semiconductor memory device, comprising:
a stacked structure including a plurality of metal lines stacked in a first direction on a substrate, the plurality of metal lines including an uppermost metal line;
a semiconductor conduction line on the uppermost metal line of the plurality of metal lines, the semiconductor conduction line including polycrystalline silicon;
a vertical structure penetrating the semiconductor conduction line and the stacked structure, the vertical structure including a channel film, and the channel film including:
an upper channel film,
a lower channel film extending in the first direction, and
an upper connection channel film connecting the upper channel film and the lower channel film between a lower surface of the semiconductor conduction line and a lower surface of the uppermost metal line, the upper connection channel film extending in a second direction different from the first direction; and

a cutting line through the plurality of metal lines and the semiconductor conduction line, the cutting line including:
an upper cutting line through the semiconductor conduction line, and
a lower cutting line through the plurality of metal lines, a width of the upper cutting line being greater than a width between two extension lines extending from sidewalls of the lower cutting line on the lower surface of the semiconductor conduction line.