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:
Mar. 31, 2009
Filed:
Jun. 14, 2007
Naoko Unagami, Yokohama, JP;
Kenichi Arakawa, Fujisawa, JP;
Naoko Unagami, Yokohama, JP;
Kenichi Arakawa, Fujisawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A pixel area, which is composed of a plurality of unit pixels each including a photoelectric conversion unit and a signal scanning circuit, is formed on a semiconductor substrate. An optical black pixel region, in which a plurality of optical black pixels for setting a dark-time level are formed, is formed in the pixel area. A barrier layer, which has an impurity concentration that is higher than an impurity concentration of the semiconductor substrate and has a conductivity type that is identical to a conductivity type of the semiconductor substrate, is formed in the optical black pixel region of the semiconductor substrate.