The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 2023
Filed:
Feb. 26, 2021
Omnivision Technologies, Inc., Santa Clara, CA (US);
Qin Wang, San Jose, CA (US);
OmniVision Technologies, Inc., Santa Clara, CA (US);
Abstract
A pixel circuit includes a trench etched into a front side surface of a semiconductor substrate. The trench includes a bottom surface etched along a <100> crystalline plane and a tilted side surface etched along a <111> crystalline plane that extends between the bottom surface and the front side surface. A floating diffusion is disposed in the semiconductor substrate beneath the bottom surface of the trench. A photodiode is disposed in the semiconductor substrate beneath the tilted side surface of the trench and is separated from the floating diffusion. The photodiode is configured to photogenerate image charge in response to incident light. A tilted transfer gate is disposed over at least a portion of the bottom surface and at least a portion of the tilted side surface of the trench. The tilted transfer gate is configured to transfer the image charge from the photodiode to the floating diffusion.