Patent ID: 11903199
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A through via structure comprising:
an insulating interlayer;
a through via including a metal pattern extending through the insulating interlayer in a vertical direction, the metal pattern including a first metal and a gap fully enclosed in the metal pattern, wherein the metal pattern includes a seam extending vertically from the gap in the metal pattern, and wherein an etching gas used to form the metal pattern remains in the gap in the metal pattern,
and
a barrier pattern on a sidewall and a lower surface of the metal pattern, the barrier pattern including a nitride of a second metal; and
a first capping pattern contacting an upper surface of the through via, the first capping pattern including at least one of a silicide of the first metal or a compound of the first metal and silicon nitride, the first capping pattern-including a lowermost edge portion, the lower most edge portion of the first capping pattern is not higher than a lowermost central portion of the first capping pattern.