Patent ID: 11862652
Assignee: SONY GROUP CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. An imaging device, comprising:
a substrate including a photoelectric conversion region;
a first trench and a second trench, wherein the photoelectric conversion region is disposed between the first trench and the second trench;
a first film including silicon oxide disposed on the photoelectric conversion region at a light receiving surface side of the substrate and contacting the substrate;
a second film disposed on a light receiving surface side of the first film;
a third film disposed on a light receiving surface side of the second film; and
a fourth film disposed on a light receiving surface side of the third film,
wherein the second film includes at least one of hafnium oxide, zirconium oxide, aluminum oxide, titanium oxide, and tantalum oxide,
wherein the third film includes at least one of hafnium oxide, zirconium oxide, aluminum oxide, titanium oxide, and tantalum oxide, and
wherein the fourth film includes at least one of hafnium oxide, zirconium oxide, aluminum oxide, titanium oxide, and tantalum oxide.