Patent ID: 11955428
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A semiconductor structure, comprising:
a substrate having a first surface, a second surface opposite to the first surface, and a first sidewall coupling the first surface and the second surface;
a first insulation layer under the first surface of the substrate;
a conductive via through the substrate and the first insulation layer;
a second insulation layer between the substrate and the conductive via, wherein the first sidewall of the substrate contacts the second insulation layer, and the second insulation layer is disposed over a top surface of the first insulation layer; and
a third insulation layer over the second surface of the substrate, wherein a topmost surface of the second insulation layer, a top surface of the third insulation layer and a top surface of the conductive via are aligned with each other,
wherein the second insulation layer comprises a bottom surface aligned with the first surface of the substrate, and a width of the bottom surface of the second insulation layer is greater than a width of the topmost surface of the second insulation layer.