JP2021034644A - 受光素子 - Google Patents
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- 239000000758 substrate Substances 0.000 claims abstract description 18
- 238000002161 passivation Methods 0.000 claims description 14
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 claims description 11
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 241
- 238000000034 method Methods 0.000 description 20
- 238000010586 diagram Methods 0.000 description 17
- 239000012535 impurity Substances 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 14
- 230000004043 responsiveness Effects 0.000 description 9
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 238000001312 dry etching Methods 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 229920002120 photoresistant polymer Polymers 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000000927 vapour-phase epitaxy Methods 0.000 description 1
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- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/1443—Devices controlled by radiation with at least one potential jump or surface barrier
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/1446—Devices controlled by radiation in a repetitive configuration
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14601—Structural or functional details thereof
- H01L27/1463—Pixel isolation structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/0248—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies
- H01L31/0256—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by the material
- H01L31/0264—Inorganic materials
- H01L31/0304—Inorganic materials including, apart from doping materials or other impurities, only AIIIBV compounds
- H01L31/03046—Inorganic materials including, apart from doping materials or other impurities, only AIIIBV compounds including ternary or quaternary compounds, e.g. GaAlAs, InGaAs, InGaAsP
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/08—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors
- H01L31/10—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors characterised by potential barriers, e.g. phototransistors
- H01L31/101—Devices sensitive to infrared, visible or ultraviolet radiation
- H01L31/102—Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier
- H01L31/103—Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier the potential barrier being of the PN homojunction type
- H01L31/1035—Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier the potential barrier being of the PN homojunction type the devices comprising active layers formed only by AIIIBV compounds
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/08—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors
- H01L31/10—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors characterised by potential barriers, e.g. phototransistors
- H01L31/101—Devices sensitive to infrared, visible or ultraviolet radiation
- H01L31/102—Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier
- H01L31/109—Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier the potential barrier being of the PN heterojunction type
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Light Receiving Elements (AREA)
Abstract
【解決手段】受光素子は、基板10と、基板10の一方の面10aに設けられた第1のコンタクト層21と、第1のコンタクト層21の上に設けられた受光層22と、受光層22の上に設けられた中間層30と、中間層30の上に設けられたpn接合を有するワイドギャップ層40と、ワイドギャップ層40の上に設けられた第2のコンタクト層43と、第2のコンタクト層43及びワイドギャップ層40の一部が除去された画素を分離する溝71と、を有し、受光層22よりも、中間層30はバンドギャップが広く、中間層30よりも、ワイドギャップ層40はバンドギャップが広い。
【選択図】 図1
Description
最初に本開示の実施態様を列記して説明する。以下の説明では、同一または対応する要素には同一の符号を付し、それらについて同じ説明は繰り返さない。
以下、本開示の一実施形態について詳細に説明するが、本実施形態はこれらに限定されるものではない。
次に、本実施形態における受光素子について、図1及び図2に基づき説明する。本実施の形態における受光素子は、近赤外光を検出する受光素子であって、いわゆる裏面入射型受光素子と呼ばれるものである。図1は、本実施の形態における受光素子の断面構造を模式的に示すものであり、図2は、本実施の形態における受光素子の受光層22、中間層30、n型ワイドギャップ層41、p型ワイドギャップ層42におけるバンド図を示す。
次に、本実施の形態における受光素子の製造方法について、図7から図14に基づき説明する。
次に、本実施の形態における光検出装置について説明する。本実施の形態における光検出装置は、図15に示される本実施の形態における2次元アレイ型受光素子100と、図17に示される読み出し回路(ROIC:Read-Out IC)200とをInバンプにより接合したものである。このため、読み出し回路200には、2次元アレイ型受光素子100におけるInバンプ65に対応するInバンプ265が設けられている。尚、読み出し回路200には、CMOS(Complimentary Metal Oxide Semiconductor)によるマルチプレクサを用いている。
10a 一方の面
10b 他方の面
21 n型コンタクト層
22 受光層
30 中間層
31 第1の中間層
32 第2の中間層
41 n型ワイドギャップ層
42 p型ワイドギャップ層
43 p型コンタクト層
50 パッシベーション膜
61 n電極
62 p電極
63 配線電極
64 配線
65 Inバンプ
71 第1の溝
72 第2の溝
80 反射防止膜
100 2次元アレイ型受光素子
165 Inバンプ接続
200 読み出し回路
265 Inバンプ
Claims (8)
- 基板と、
前記基板の一方の面に設けられた第1のコンタクト層と、
前記第1のコンタクト層の上に設けられた受光層と、
前記受光層の上に設けられた中間層と、
前記中間層の上に設けられたpn接合を有するワイドギャップ層と、
前記ワイドギャップ層の上に設けられた第2のコンタクト層と、
前記第2のコンタクト層及び前記ワイドギャップ層の一部が除去された画素を分離する溝と、
を有し、
前記受光層よりも、前記中間層はバンドギャップが広く、
前記中間層よりも、前記ワイドギャップ層はバンドギャップが広い受光素子。 - 前記中間層は、組成比の異なる複数の層により形成されており、
前記受光層から前記ワイドギャップ層に向かって、バンドギャップが広くなる請求項1に記載の受光素子。 - 前記ワイドギャップ層はp型ワイドギャップ層とn型ワイドギャップ層とを含み、
前記溝の底面には、前記n型ワイドギャップ層が露出している請求項1または請求項2に記載の受光素子。 - 前記基板の他方の面より入射する赤外光を検出する請求項1から請求項3のいずれか1項に記載の受光素子。
- 前記受光層は、InGaAsを含む層であり、
前記中間層は、InGaAsPを含む層であり、
前記ワイドギャップ層は、InPを含む層である請求項1から請求項4のいずれか1項に記載の受光素子。 - 前記溝におけるワイドギャップ層の側面には、SiNまたはSiONによりパッシベーション膜が形成されている請求項1から請求項5のいずれか1項に記載の受光素子。
- 前記第1のコンタクト層はn型コンタクト層であり、
前記第2のコンタクト層はp型コンタクト層である請求項1から請求項6のいずれか1項に記載の受光素子。 - 前記溝により分離された前記画素が、1次元または2次元に配列されている請求項1から請求項7のいずれか1項に記載の受光素子。
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JP2019155612A JP7347005B2 (ja) | 2019-08-28 | 2019-08-28 | 受光素子 |
US16/999,421 US11133427B2 (en) | 2019-08-28 | 2020-08-21 | Light receiving device |
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JP2019155612A JP7347005B2 (ja) | 2019-08-28 | 2019-08-28 | 受光素子 |
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Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US11476382B2 (en) * | 2021-01-26 | 2022-10-18 | Lumentum Japan, Inc. | Semiconductor light-receiving element |
CN114792738A (zh) | 2021-01-26 | 2022-07-26 | 朗美通日本株式会社 | 半导体光接收元件 |
US20230010538A1 (en) * | 2021-06-23 | 2023-01-12 | Aeluma, Inc. | Photodetector module comprising emitter and receiver |
US20220413101A1 (en) * | 2021-06-23 | 2022-12-29 | Aeluma, Inc. | Lidar sensor for mobile device |
US20220415950A1 (en) * | 2021-06-23 | 2022-12-29 | Aeluma, Inc. | Lidar sensor for mobile device |
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JPS5783069A (en) * | 1980-11-11 | 1982-05-24 | Fujitsu Ltd | Manufacture of photoreceiving device |
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2019
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- 2020-08-21 US US16/999,421 patent/US11133427B2/en active Active
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JPH04167565A (ja) * | 1990-10-31 | 1992-06-15 | Fujitsu Ltd | フリップチップ型受光素子 |
JPH05102517A (ja) * | 1991-05-30 | 1993-04-23 | Fujitsu Ltd | アバランシエフオトダイオードとその製造方法 |
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JP2013175686A (ja) * | 2012-02-27 | 2013-09-05 | Sumitomo Electric Ind Ltd | 受光素子、その製造方法、および検出装置 |
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