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:
Sep. 22, 2009
Filed:
Sep. 01, 2005
Narumi Ohkawa, Kawasaki, JP;
Shigetoshi Takeda, Kawasaki, JP;
Yukihiro Ishihara, Kawasaki, JP;
Kazuki Hayashi, Kawasaki, JP;
Nobuhisa Naori, Kawasaki, JP;
Masahiro Chijiiwa, Kawasaki, JP;
Narumi Ohkawa, Kawasaki, JP;
Shigetoshi Takeda, Kawasaki, JP;
Yukihiro Ishihara, Kawasaki, JP;
Kazuki Hayashi, Kawasaki, JP;
Nobuhisa Naori, Kawasaki, JP;
Masahiro Chijiiwa, Kawasaki, JP;
Fujitsu Microelectronics Limited, Tokyo, JP;
Abstract
A semiconductor image sensor includes: a semiconductor substrate having a number of pixels disposed in a matrix shape, the semiconductor substrate comprising a first region including a charge accumulation region of a photodiode and a floating diffusion and a second region including transistors, each having a gate electrode and source/drain regions; a first silicon oxide film formed above the semiconductor substrate, covering the surface of the charge accumulation region in the first region and formed as side wall spacers on side of the gate electrode walls of at lease some transistors in the second region; and a silicon nitride film formed above the first silicon oxide film, covering the source/drain regions in the second region and having an opening at least in an area above the charge accumulation region in the first region. The semiconductor image sensor is provided which has a high sensitivity and can supply an output with small noises.