Patent ID: 11876017
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A method of forming an integrated circuit device, the method comprising:
forming a first insulating layer and a via contact on a substrate, wherein the substrate comprises an upper surface facing the via contact, and the via contact is in the first insulating layer and comprises a lower surface facing the substrate and an upper surface opposite to the lower surface; and
forming a second insulating layer and a metallic wire on the via contact, wherein the metallic wire is in the second insulating layer and comprises a lower surface that faces the substrate and contacts the upper surface of the via contact,
wherein both the lower surface of the metallic wire and an interface between the metallic wire and the via contact have a first width in a horizontal direction that is parallel to the upper surface of the substrate,
wherein the upper surface of the via contact has a second width in the horizontal direction, and the second width is wider than the first width,
wherein forming the first insulating layer and the via contact comprises:
forming a preliminary first insulating layer and the via contact on the substrate, wherein the via contact is in the preliminary first insulating layer; and
selectively forming a capping insulating layer on the preliminary first insulating layer, wherein the upper surface of the via contact is free of the capping insulating layer after selectively forming the capping insulating layer on the preliminary first insulating layer,
wherein the first insulating layer comprises the preliminary first insulating layer and the capping insulating layer, and the capping insulating layer and the upper surface of the via contact define a recess, and
wherein forming the second insulating layer and the metallic wire comprises:
forming a metallic layer on the first insulating layer and the via contact
forming the metallic wire by patterning the metallic layer; and
forming the second insulating layer on the metallic wire.