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:
May. 26, 2009
Filed:
Jul. 20, 2006
Tsutomu Miyajima, Osaka, JP;
Takaki Iwai, Osaka, JP;
Hisatada Yasukawa, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An optical semiconductor device includes a first light receiving region and a second light receiving region provided on a substrate and the first and second light receiving regions include light receiving elements, respectively. A first anti-reflection film is formed in the first light receiving region of the substrate and a second anti-reflection film is formed in the second light receiving region of the substrate. The reflectance of the first anti-reflection film for a first wavelength range of light is lower than the reflectance of the second anti-reflection film for the first wavelength range of light and the reflectance of the second anti-reflection film for a second wavelength range of light which is different from the first wavelength range of light is lower than the reflectance of the first anti-reflection film for the second wavelength range of light.