Light-collecting device and solid-state imaging apparatus

The present invention provides an optical device and the like which can collect incident light at a high incident angle than an existing microlens, in order to realize a solid-state imaging apparatus and the like corresponding to an optical system (an optical system with a high incident angle ) with...

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Bibliographic Details
Main Author TOSHIKIYO KIMIAKI
Format Patent
LanguageEnglish
Published 13.09.2011
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
SEMICONDUCTOR DEVICES
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Summary:The present invention provides an optical device and the like which can collect incident light at a high incident angle than an existing microlens, in order to realize a solid-state imaging apparatus and the like corresponding to an optical system (an optical system with a high incident angle ) with a short focal length for a thin camera. Each unit pixel (2.8 μm square in size) is made up of a distributed index lens 1, a color filter 2 for green G, Al wirings 3, a signal transmitting unit 4, planarizing films 5, a light-receiving device (Si photodiodes) 6, and a Si substrate 7. The distributed index lens 1 is made of high refractive index materials 33 [TiO2 (n=2.53)] and low refractive index materials 34 [air (n=1.0)] having concentric zones. Further, in a distributed refractive index lens, a width 35 of adjacent divided areas is 200 nm. Also, a film thickness t is 0.5 μm.
Bibliography:Application Number: US20040576023