Patent ID: 11955392
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 14:
15. A testing unit comprising a metal layer including:
a metal structure;
a dielectric surrounding the metal structure;
a plurality of TSVs extending in a first direction perpendicular to the metal layer and separated from the metal structure; and
a second metal layer disposed over the metal layer, the second metal layer including a second metal structure disposed over the metal structure, and wherein a capacitance is measured across the metal structure and the second metal structure;
wherein the metal structure is coupled to first, second, third, and fourth contacts, wherein a current is applied at the first contact, an equal and opposite current is applied at the second contact, and a voltage is measured across the third and fourth contacts.