Title:
SOLID-STATE IMAGE SENSOR AND IMAGE CAPTURING APPARATUS USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2015/015790
Kind Code:
A1
Abstract:
The present invention provides a solid-state image sensor (100) in which degradation in image quality can be reduced. The solid-state image sensor includes an optical isolation layer (110) between a pupil dividing unit (101) and a plurality of photoelectric conversion units (121, 122). The optical isolation layer includes a plurality of high-refractive-index areas (111, 112) and a low-refractive-index area (113) having a lower refractive index than that of the high- refractive-index areas. The high-refractive-index areas are disposed above the photoelectric conversion units, and the low-refractive- index area is disposed between the high-refractive-index areas. The refractive index changes stepwise at the boundaries between the high-refractive-index areas and the low-refractive-index area. The refractive index difference of the stepwise changing portion is 0.15 or more. A value obtained by multiplying the physical thickness of the optical isolation layer by the refractive index of the high-refractive- index areas is 2.0 or less times as large as the wavelength of incident light.
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Inventors:
NUMATA AIHIKO (JP)
Application Number:
PCT/JP2014/003950
Publication Date:
February 05, 2015
Filing Date:
July 28, 2014
Export Citation:
Assignee:
CANON KK (JP)
International Classes:
H01L27/146
Domestic Patent References:
| WO2013094419A1 | 2013-06-27 |
Foreign References:
| US20120119068A1 | 2012-05-17 | |||
| US20120133809A1 | 2012-05-31 | |||
| JP2009158800A | 2009-07-16 | |||
| JP4835136B2 | 2011-12-14 |
Attorney, Agent or Firm:
ABE, Takuma et al. (30-2Shimomaruko 3-chome, Ohta-k, Tokyo 01, JP)
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