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

Claim 5:
6. A semiconductor device comprising:
a first substrate;
a logical circuit disposed on the first substrate;
a first insulating film disposed above the logical circuit;
a wiring including:
a first film disposed in the first insulating film, the first film extending in a first direction along an upper surface of the first substrate, and
a first metal layer disposed in the first insulating film and on the first film;

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