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. 17, 2018
Filed:
Sep. 26, 2016
Semiconductor Components Industries, Llc, Phoenix, AZ (US);
Swarnal Borthakur, Boise, ID (US);
Larry Duane Kinsman, Boise, ID (US);
SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Phoenix, AZ (US);
Abstract
An image sensor may include an infrared radiation-blocking layer. The infrared radiation-blocking layer may block infrared radiation from reflecting off of metal layers formed beneath pixel structures in the image sensor so that the reflected light does not reach the photodiodes. The infrared radiation-blocking layer may be formed between a backside redistribution layer and an epitaxial silicon layer in which pixel structures such as photodiodes and transistors are formed. The infrared radiation-blocking layer may be formed from a pre-existing metal layer between the backside redistribution layer and the epitaxial silicon layer. The infrared radiation-blocking layer may prevent the image sensor from generating inadvertent photocurrents in response to reflected infrared light.