Patent ID: 11923357
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An interfacial structure, comprising:
a first structure, comprising:
a first dielectric layer;
a first conductive feature disposed in the first dielectric layer, wherein the first conductive feature has a first sidewall;
a first cap layer disposed on the first conductive feature, wherein the first conductive feature is different from the first cap layer; and
a first thermal conductive layer disposed directly on the first dielectric layer, wherein a maximum thickness of the first cap layer is substantially the same as a maximum thickness of the first thermal conductive layer; and

a second structure disposed on the first structure, wherein the second structure comprises:
a second thermal conductive layer disposed on the first thermal conductive layer;
a second dielectric layer disposed on the second thermal conductive layer;
a second conductive feature disposed in the second dielectric layer, wherein the second conductive feature has a second sidewall disposed over the first sidewall, and the first sidewall and the second sidewall taper in opposite directions; and
a second cap layer disposed between the second conductive feature and the first cap layer, wherein the second conductive feature is different from the second cap layer.