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. 10, 2007
Filed:
Apr. 13, 2005
Akira Tsukamoto, Toyonaka, JP;
Akira Tsukamoto, Toyonaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The photosensor includes a semiconductor substrate provided with a light receiving portion for converting incident light and a signal readout portion; a light shielding layer formed above the light receiving portion and having an aperture; and a transparent insulating layer formed so as to fill the aperture. A relationship 2nW≧λmax is satisfied, where W represents a minimum width of the aperture, n represents an average refractive index of the insulating layer in a region between a position corresponding to the uppermost surface of the light shielding layer and the surface of the light receiving portion, and λmax represents a maximum wavelength of the sensitive wavelength range of the light receiving portion. The aperture rate of the light receiving portion can be reduced without causing a sensitivity decrease and a change in spectral characteristics on the long wavelength side of the effective wavelength range.