Patent ID: 11923291
Assignee: KIOXIA CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 21:
22. A semiconductor device comprising:
a substrate;
an insulating film disposed above the substrate;
a first wiring including:
a first film disposed in the insulating film, the first film extending in a first direction along an upper surface of the first substrate, the first film containing a first metal, and
a first metal layer disposed in the insulating film and on the first film;

a plug electrically connected to the first wiring, the plug extending in a second direction that intersects the first direction;
a first layer, containing a metal oxide or a metal nitride, the first layer disposed between the plug and the first wiring;
a second metal layer disposed between the first layer and the first metal layer, the second metal layer containing the first metal and having a different composition from the first layer, wherein the first film, the first layer and the second metal layer contain a same metal element; and
a second wiring disposed adjacent to the first wiring, the second wiring having a second film containing the first metal, the second film extending in the first direction,
wherein the first film and the second film have a different thickness in the second direction.