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:
May. 09, 2023
Filed:
Dec. 07, 2020
Omnivision Technologies, Inc., Santa Clara, CA (US);
Seong Yeol Mun, Santa Clara, CA (US);
Omnivision Technologies, Inc., Santa Clara, CA (US);
Abstract
A pixel array for a high definition (HD) image sensor is disclosed. The pixel array includes a number of split pixel cells each including a first photodiode and a second photodiode that is more sensitive to incident light than the first photodiode. The first photodiode can be used to sense bright or high intensity light conditions, while the second photodiode can be used to sense low to medium intensity light conditions. In the disclosed pixel array, the sensitivity of one or more photodiodes is reduced by application of a light attenuation layer over the first photodiode of each split pixel cell. In accordance with methods of the disclosure, the light attenuation layer can be formed prior to the formation of a metal, optical isolation grid structure. This can lead to better control of the thickness and uniformity of light attenuation layer.