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:
Jul. 11, 2023
Filed:
Sep. 17, 2020
Stmicroelectronics (Crolles 2) Sas, Crolles, FR;
Stmicroelectronics SA, Montrouge, FR;
Stephane Monfray, Eybens, FR;
Olivier Le Neel, Saint Martin d Uriage, FR;
Frederic Boeuf, Le Versoud, FR;
STMicroelectronics (Crolles 2) SAS, Crolles, FR;
STMicroelectronics SA, Montrouge, FR;
Abstract
A light sensor includes a semiconductor substrate supporting a number of pixels. Each pixel includes a photoconversion zone extending in the substrate between a front face and a back face of the substrate. An optical diffraction grating is arranged over the back face of the substrate at a position facing the photoconversion zone of the pixel. For at least two different pixels of the light sensor, the optical diffraction gratings have different pitches. Additionally, the optical grating of each pixel is surrounded by an opaque wall configured to absorb at operating wavelengths of the sensor.