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:
Jan. 14, 2014
Filed:
Apr. 16, 2010
Yu-hao Shih, Yongkang, TW;
Szu-ying Chen, Taichung, TW;
Hsing-lung Chen, Kaohsiung, TW;
Jen-cheng Liu, Hsinchu, TW;
Dun-nian Yaung, Taipei, TW;
Volume Chien, Sinying, TW;
Yu-Hao Shih, Yongkang, TW;
Szu-Ying Chen, Taichung, TW;
Hsing-Lung Chen, Kaohsiung, TW;
Jen-Cheng Liu, Hsinchu, TW;
Dun-Nian Yaung, Taipei, TW;
Volume Chien, Sinying, TW;
Abstract
The structures of reflective shields and methods of making such structures described enable reflection of light that has not be absorbed by photodiodes in image sensor devices and increase quantum efficiency of the photodiodes. Such structures can be applied (or used) for any image sensors to improve image quality. Such structures are particular useful for image sensors with smaller pixel sizes and for long-wavelength light (or rays), whose absorption length (or depth) could be insufficient, especially for backside illumination (BSI) devices. The reflective shields could double, or more than double, the absorption depth for light passing through the image sensors and getting reflected back to the photodiodes. Concave-shaped reflective shields have the additional advantage of directing reflected light toward the image sensors.