Patent ID: 11967550
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A semiconductor structure, comprising:
a substrate;
an interconnection structure, disposed over the substrate and comprising:
a first tier of conductive structure comprising a first conductive line and a second conductive line, wherein the first conductive line and the second conductive line are laterally extending along a first direction and arranged along a second direction perpendicular to the first direction;
a second tier of conductive structure disposed over the first tier of conductive structure, and comprising a third conductive line surrounding by a first dielectric layer and laterally extending along the second direction;
a conductive via, surrounded by a second dielectric layer and disposed between the first tier of conductive structure and the second tier of conductive structure, wherein the conductive via extends along the second direction and across a first sidewall of the first conductive line and a first sidewall of the second conductive line that face each other; and
an etching stop layer disposed between the first and second dielectric layers, wherein the etching stop layer is in contact with the third conductive line
wherein the lateral dimension of the conductive via in the first direction is less than the lateral dimension of the second tier of conductive structure in the first direction, and the lateral dimension of the first tier of conductive structure in the first direction is larger than the lateral dimension of the second tier of conductive structure in the first direction,
wherein the lateral dimension of the second tier of conductive structure in the second direction is greater than the lateral dimension of the conductive via in the second direction, and the lateral dimension of the conductive via in the second direction is larger than the lateral dimension of the first tier of conductive structure in the second direction.