Patent ID: 11895838
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. The vertical memory device as claimed in claim 14, wherein:
each of the gate electrode structures includes steps at end portions in the second direction of the gate electrodes, respectively,
the vertical memory device further includes:
contact plugs each of which extends in the first direction through ones of the steps of each of the gate electrode structures, each of the contact plugs contacting only one of the ones of the steps, and
a through via extending in the first direction through each of the gate electrode structures, the through via not extending through any of the steps,
wherein an upper surface of the through via is substantially coplanar with upper surfaces of the contact plugs, and the through via includes a substantially same material as the contact plugs.