Patent ID: 11929328
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. A semiconductor device, comprising:
a first interlayer dielectric (ILD) disposed over a substrate;
a second ILD disposed over the first ILD; and
a conductive contact that extends vertically through the second ILD and at least partially through the first ILD, wherein the conductive contact includes a metal component, a first barrier layer disposed on a side surface of the metal component, a second barrier layer disposed on a side surface of the first barrier layer, and a third barrier layer disposed on a side surface of the second barrier layer;
wherein:
the first barrier layer is in physical contact with the first ILD but not with the second ILD;
the second barrier layer is in physical contact with both the first ILD and the second ILD; and
the third barrier layer is in physical contact with the second ILD but not with the first ILD.