Title:
LIGHT DETECTION DEVICE AND ELECTRONIC APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/199642
Kind Code:
A1
Abstract:
Provided is a light detection device which can increase a charge amount that can be accumulated in a photoelectric conversion unit. The present invention comprises: a semiconductor substrate; a photoelectric conversion unit which is formed on the semiconductor substrate, and generates and accumulates charges according to a light reception amount; a charge holding unit which holds charges generated in the photoelectric conversion unit; and a transmission gate which transmits, to the charge holding unit, the charges accumulated by the photoelectric conversion unit. In addition, the photoelectric conversion unit has a configuration including a p-type semiconductor area that includes p-type impurities and is continuously formed in the thickness direction of the semiconductor substrate, and an n-type semiconductor area that is formed in an area contacting the p-type semiconductor area, includes n-type impurities, and is continuously formed in the thickness direction of the semiconductor substrate. Here, the n-type semiconductor area has a uniform impurity concentration of the n-type impurities in the thickness direction of the semiconductor substrate. In addition, the transmission gate has a vertical gate electrode which reaches deeper than an end of the n-type semiconductor area from the surface of the semiconductor substrate, the end being positioned on the back surface of the semiconductor substrate.
Inventors:
MASAGAKI ATSUSHI (JP)
Application Number:
PCT/JP2023/008207
Publication Date:
October 19, 2023
Filing Date:
March 06, 2023
Export Citation:
Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORP (JP)
International Classes:
H01L27/146; H04N25/70
Domestic Patent References:
| WO2020026856A1 | 2020-02-06 | |||
| WO2016136487A1 | 2016-09-01 | |||
| WO2020066640A1 | 2020-04-02 | |||
| WO2021124975A1 | 2021-06-24 | |||
| WO2018038230A1 | 2018-03-01 |
Foreign References:
| JP2012175067A | 2012-09-10 | |||
| JP2018190797A | 2018-11-29 | |||
| JP2017183636A | 2017-10-05 | |||
| JP2016136584A | 2016-07-28 | |||
| US20160013240A1 | 2016-01-14 | |||
| JPH07202156A | 1995-08-04 | |||
| JP2016103541A | 2016-06-02 | |||
| JP2008258316A | 2008-10-23 |
Attorney, Agent or Firm:
TANAKA Hidetetsu et al. (JP)
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