Patent ID: 11925015
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A vertical memory device comprising:
a cell gate stack structure on a substrate, the cell gate stack structure comprising a plurality of cell gate lines spaced apart from one another in a vertical direction, and an opening adjacent to the plurality of cell gate lines, the opening passing through the cell gate stack structure;
a contact plug in the opening, the contact plug comprising an inner sidewall delimiting a recessed region in the opening;
a buried film pattern in a portion of the recessed region, the buried film pattern being formed of a Si-containing material;
a contact overlying the buried film pattern, the contact comprising an inner contact portion disposed in the recessed region; and
a separation film pattern interposed between the plurality of cell gate lines and the contact plug,
wherein the contact plug comprises a conductive metal nitride, and
wherein the inner contact portion of the contact is in contact with the buried film pattern within the recessed region.