[Paper] A Low Noise and High Sensitivity Image Sensor with Imaging and Phase-Difference Detection AF in All Pixels

Masahiro Kobayashi; Michiko Johnson; Yoichi Wada; Hiromasa Tsuboi; Hideaki Takada; Kenji Togo; Takafumi Kishi; Hidekazu Takahashi; Takeshi Ichikawa; Shunsuke Inoue

doi:10.3169/mta.4.123

Special Section on Advanced Image Sensor Technology

[Paper] A Low Noise and High Sensitivity Image Sensor with Imaging and Phase-Difference Detection AF in All Pixels

Masahiro Kobayashi, Michiko Johnson, Yoichi Wada, Hiromasa Tsuboi, Hideaki Takada, Kenji Togo, Takafumi Kishi, Hidekazu Takahashi, Takeshi Ichikawa, Shunsuke Inoue

Author information

Masahiro Kobayashi
Canon, Inc., Kawasaki Office
Michiko Johnson
Canon, Inc., Kawasaki Office
Yoichi Wada
Canon, Inc., Kawasaki Office
Hiromasa Tsuboi
Canon, Inc., Kawasaki Office
Hideaki Takada
Canon, Inc., Kawasaki Office
Kenji Togo
Canon, Inc., Kawasaki Office
Takafumi Kishi
Canon, Inc., Headquarters
Hidekazu Takahashi
Canon, Inc., Kawasaki Office
Takeshi Ichikawa
Canon, Inc., Kawasaki Office
Shunsuke Inoue
Canon, Inc., Kawasaki Office

Keywords: CMOS image sensor, phase-difference detection AF (PDAF), image plane PDAF, separated photodiodes, PN junction separation

JOURNAL FREE ACCESS

2016 Volume 4 Issue 2 Pages 123-128

DOI https://doi.org/10.3169/mta.4.123

Details

Abstract

In this paper, we describe a device structure and optical design for a CMOS image sensor with phase-difference detection photodiodes (PD) for autofocus (AF) function. The individual pixel of this image sensor is composed of two horizontally displaced PDs separated by a PN junction. All the effective pixels function as both the imaging and the phase-difference detection AF (PDAF). We have realized a low dark random noise (1.8e- at 1PD, 2.5e- at 1pixel) and high sensitivity (78Ke-/lx.sec at 1green pixel) image sensor with the imaging and the PDAF functions in all the effective pixels.

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