Patent ID: 11901387
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A structure, comprising:
a substrate;
a first deep trench isolation (DTI) feature and a second DTI feature extending into the substrate;
a metal oxide layer disposed between the first DTI feature and the substrate as well as between the second DTI feature and the substrate;
a metal grid disposed on and in direct contact with the first DTI feature and the second DTI feature; and
a first dielectric layer between the metal oxide layer and the first DTI feature as well as between the metal oxide layer and the second DTI feature,
wherein the first dielectric layer comprises tantalum oxide (Ta2O5), titanium oxide, zirconium oxide, or a combination thereof.