WO2005001939A1 - イメージセンサおよびフォトダイオードの分離構造の形成方法 - Google Patents
イメージセンサおよびフォトダイオードの分離構造の形成方法 Download PDFInfo
- Publication number
- WO2005001939A1 WO2005001939A1 PCT/JP2004/009589 JP2004009589W WO2005001939A1 WO 2005001939 A1 WO2005001939 A1 WO 2005001939A1 JP 2004009589 W JP2004009589 W JP 2004009589W WO 2005001939 A1 WO2005001939 A1 WO 2005001939A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- region
- trench
- conductivity type
- photodiode
- image sensor
- Prior art date
Links
- 238000002955 isolation Methods 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims description 43
- 239000004065 semiconductor Substances 0.000 claims abstract description 74
- 239000000758 substrate Substances 0.000 claims abstract description 64
- 238000000605 extraction Methods 0.000 claims abstract description 25
- 239000010410 layer Substances 0.000 claims description 204
- 239000012535 impurity Substances 0.000 claims description 37
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 25
- 229920005591 polysilicon Polymers 0.000 claims description 22
- 238000000926 separation method Methods 0.000 claims description 15
- 239000002344 surface layer Substances 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 230000001590 oxidative effect Effects 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 43
- 229910052814 silicon oxide Inorganic materials 0.000 description 43
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 38
- 229910052710 silicon Inorganic materials 0.000 description 38
- 239000010703 silicon Substances 0.000 description 38
- 230000007547 defect Effects 0.000 description 21
- 238000004519 manufacturing process Methods 0.000 description 15
- 238000009792 diffusion process Methods 0.000 description 12
- 238000000407 epitaxy Methods 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 238000001020 plasma etching Methods 0.000 description 9
- 229910052581 Si3N4 Inorganic materials 0.000 description 8
- 239000000969 carrier Substances 0.000 description 8
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 8
- 238000003892 spreading Methods 0.000 description 8
- 238000005530 etching Methods 0.000 description 6
- 238000005229 chemical vapour deposition Methods 0.000 description 5
- 238000002513 implantation Methods 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 241000233855 Orchidaceae Species 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- H01L27/14683—Processes or apparatus peculiar to the manufacture or treatment of these devices or parts thereof
- H01L27/14687—Wafer level processing
-
- 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
- H01L27/14643—Photodiode arrays; MOS imagers
Definitions
- Some image sensors are arranged with a plurality of photodiodes and can measure the distribution of the amount of light in the arrangement direction of the photodiodes. In each photodiode, a photovoltaic power corresponding to the amount of light received is generated.
- the depletion layer spreads in the semiconductor part where the defect is introduced, and it cannot be prevented that the adjacent photodiode is affected. This is a factor that causes a change in characteristics.
- the photodiodes may be configured such that signals generated by these photodiodes according to the amount of light received are respectively extracted through the signal extraction regions.
- a device isolation region having a first trench; and a region formed between the second region and the first trench, wherein a depletion layer expands when a reverse bias voltage of a predetermined magnitude is applied to the photodiode.
- a first conductivity type depletion layer limiting region that limits the region to a region other than a predetermined region around the first trench.
- the image sensor is provided outside the array region of the photodiodes on a surface of the semiconductor substrate on which the photodiodes are arranged, and is electrically connected to the first region of the photodiodes.
- the first region electrode may be further included.
- the first region may be formed continuously with a region extending over the plurality of photodiodes.
- the first trench may have a depth that extends halfway in the thickness direction of the first region, and the first region may not be completely separated by the first trench.
- Polysilicon may be arranged inside the first trench.
- the image sensor according to the second aspect of the present invention can be manufactured.
- the method for forming these isolation structures may further include a step of filling the inside of the first trench with a filling material.
- the force source electrode 17 and the first anode electrode 19a are separated and are not electrically connected.
- FIGS. 4 (a) to 4 (d) are schematic cross-sectional views for explaining a method of manufacturing the image sensor 1 shown in FIGS. 1 to 3.
- 4 (a) to 4 (d) show cross sections corresponding to the cross section taken along line III-III in FIG.
- FIGS. 4 (a) and 4 (b) show a range corresponding to a region extending over two sensor array regions 25, and
- FIGS. 4 (c) and 4 (d) show one sensor. The range corresponding to the partial array region 25 is shown.
- a silicon oxide film 28 is formed on the exposed surface including the inner surface of the deep trench 13 by, for example, a low pressure CVD (Chemical Vapor Deposition) method. Then, so as to fill the de-one Putorenchi 13, for example, due to a low pressure CVD method, after the polysilicon film 2 9 is formed, for example, by CMP (Ch em icaI Mechanical Polishing) method, outside the deep trench 13 Poly The silicon film 28 and the silicon film 29 are removed. As a result, as shown in FIG. 4C, the polysilicon film 28 exists only in the deep trench 13.
- CMP Cho em icaI Mechanical Polishing
- the epitaxial layer 4 in a region corresponding to the non-sensor region 26 is passed through a mask having an opening of a predetermined pattern. Then, implantation of N-type impurities and thermal diffusion are performed, and the conductivity type of the region is changed to N-type. Thus, an epitaxial layer 4N is obtained.
- STI Shallow Trench Isolation
- CMOS complementary metal oxide semiconductor
- FIG. 6 is a schematic plan view of an image sensor according to the second embodiment of the present invention.
- FIG. 7 is a sectional view taken along the line VII-VII of FIG. 6, and
- FIG. 8 is a sectional view taken along the line VIII-VIII.
- the epitaxial layer 44 is separated (DTI; Deep Trench Isolation) by the deep trench 13.
- the deep trench 13 has a depth extending halfway in the thickness direction of the buried layer 43. That is, the buried layer 43 is not completely separated by the deep trench 13.
- the depth of the deep trench 13 is equal to the thickness of the epitaxial layer 44, for example, about several / zm.
- a plurality of plug-like (column-shaped) first anode electrodes 55 a penetrating through the silicon oxide film 60 are formed on the anode regions 56 of the sensor array region 65 and the non-sensor region 66. ing. First anode electrode 5 provided in sensor array region 65
- the first anode electrodes 55a are arranged along the direction in which the sensor units 50 are arranged, and at least one first anode electrode 55a is provided for each sensor unit 50. A plurality of first anode electrodes 55a may be provided for each sensor section 50.
- the impurity concentration of the epitaxial layer 44 N, the buried layer 43, and the anode region 56 of the sensor section 50, their thickness, and the arrangement of the anode region 56 are determined by the photodiode 62 and the surface photodiode.
- a reverse bias voltage of a predetermined magnitude is applied to 64, the epitaxial layer 44N is set to be almost completely depleted.
- the depletion layer restriction region 59 due to the high impurity concentration of the depletion layer restriction region 59, the depletion layer becomes defective near the interface between the depletion layer restriction region 59 and the silicon nitride film 28 around the deep trench 13. Are not spread to the area where the rank is introduced.
- Such a depletion layer limiting region 39 is used, for example, when an N-type impurity is implanted into the epitaxial layer 4 in a region corresponding to the non-sensor region 26 and thermally diffused to form the epitaxial layer 4N.
- an N-type impurity is implanted into a predetermined region of the epitaxial layer 4 corresponding to the depletion layer limiting region 39 and thermally diffused.
- an image sensor provided with an element isolation region having a deep trench 13 and a shallow trench 31 (see FIGS.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Solid State Image Pick-Up Elements (AREA)
- Element Separation (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/544,903 US7187017B2 (en) | 2003-06-30 | 2004-06-30 | Image sensor and method for forming isolation structure for photodiode |
JP2005511155A JP4841249B2 (ja) | 2003-06-30 | 2004-06-30 | イメージセンサおよびフォトダイオードの分離構造の形成方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-188394 | 2003-06-30 | ||
JP2003188394 | 2003-06-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005001939A1 true WO2005001939A1 (ja) | 2005-01-06 |
Family
ID=33549748
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/009589 WO2005001939A1 (ja) | 2003-06-30 | 2004-06-30 | イメージセンサおよびフォトダイオードの分離構造の形成方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7187017B2 (ja) |
JP (1) | JP4841249B2 (ja) |
KR (1) | KR20060022709A (ja) |
CN (1) | CN100466270C (ja) |
TW (1) | TW200507289A (ja) |
WO (1) | WO2005001939A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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EP1750308A2 (en) | 2005-08-04 | 2007-02-07 | Avago Technologies Sensor IP (Singapore) Pte. Ltd. | Reduced crosstalk CMOS image sensors |
US7652313B2 (en) * | 2005-11-10 | 2010-01-26 | International Business Machines Corporation | Deep trench contact and isolation of buried photodetectors |
JP2016152272A (ja) * | 2015-02-16 | 2016-08-22 | エスアイアイ・セミコンダクタ株式会社 | 受光素子を有する光検出半導体装置 |
JP2018518838A (ja) * | 2015-12-29 | 2018-07-12 | 同方威視技術股▲分▼有限公司 | 同一面電極のフォトダイオードアレイ及びその製造方法 |
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US7875916B2 (en) | 2005-09-28 | 2011-01-25 | Eastman Kodak Company | Photodetector and n-layer structure for improved collection efficiency |
KR101176545B1 (ko) * | 2006-07-26 | 2012-08-28 | 삼성전자주식회사 | 마이크로 렌즈의 형성방법과 마이크로 렌즈를 포함한이미지 센서 및 그의 제조방법 |
CN101861650A (zh) * | 2007-08-10 | 2010-10-13 | 阿雷光电公司 | 具有沟道隔离的背照式薄型光电二极管阵列 |
US20090243025A1 (en) * | 2008-03-25 | 2009-10-01 | Stevens Eric G | Pixel structure with a photodetector having an extended depletion depth |
US8618458B2 (en) | 2008-11-07 | 2013-12-31 | Omnivision Technologies, Inc. | Back-illuminated CMOS image sensors |
EP2202795A1 (en) * | 2008-12-24 | 2010-06-30 | S.O.I. TEC Silicon | Method for fabricating a semiconductor substrate and semiconductor substrate |
FR2945672A1 (fr) * | 2009-05-18 | 2010-11-19 | St Microelectronics Sa | Photodiode a controle de charge d'interface par implantation et procede associe. |
FR2945671A1 (fr) * | 2009-05-18 | 2010-11-19 | St Microelectronics Sa | Photodiode a controle de charge d'interface et procede associe. |
JP2011086709A (ja) | 2009-10-14 | 2011-04-28 | Toshiba Corp | 固体撮像装置及びその製造方法 |
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US8507962B2 (en) | 2010-10-04 | 2013-08-13 | International Business Machines Corporation | Isolation structures for global shutter imager pixel, methods of manufacture and design structures |
FR2969384A1 (fr) * | 2010-12-21 | 2012-06-22 | St Microelectronics Sa | Capteur d'image a intermodulation reduite |
FR2969385A1 (fr) | 2010-12-21 | 2012-06-22 | St Microelectronics Crolles 2 | Capteur d'images a taux d'intermodulation réduit |
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EP3113224B1 (en) * | 2015-06-12 | 2020-07-08 | Canon Kabushiki Kaisha | Imaging apparatus, method of manufacturing the same, and camera |
US10069833B2 (en) * | 2015-11-29 | 2018-09-04 | International Business Machines Corporation | Computer network cross-boundary protection |
KR20190011977A (ko) * | 2017-07-26 | 2019-02-08 | 주식회사 디비하이텍 | 후면 조사형 이미지 센서 및 그 제조 방법 |
JP7129199B2 (ja) * | 2018-04-11 | 2022-09-01 | キヤノン株式会社 | 光検出装置、光検出システム及び移動体 |
US11152421B2 (en) * | 2018-11-06 | 2021-10-19 | Omnivision Technologies, Inc. | Small-pitch image sensor |
KR102611170B1 (ko) * | 2018-12-28 | 2023-12-08 | 에스케이하이닉스 주식회사 | 수직 핀형 캐패시터 및 이를 포함하는 이미지 센싱 장치 |
CN109752418B (zh) * | 2019-01-21 | 2021-11-05 | 中国科学院上海微系统与信息技术研究所 | 一种微型热导气体传感器 |
US11196947B2 (en) * | 2019-09-17 | 2021-12-07 | New Imaging Technologies | Optical sensor |
CN112582482B (zh) * | 2019-09-30 | 2024-01-02 | 罗姆股份有限公司 | 二极管芯片 |
JP7309647B2 (ja) | 2020-03-24 | 2023-07-18 | 株式会社東芝 | 受光装置及び半導体装置 |
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2004
- 2004-06-30 CN CNB200480007665XA patent/CN100466270C/zh not_active Expired - Fee Related
- 2004-06-30 KR KR1020057024637A patent/KR20060022709A/ko not_active Application Discontinuation
- 2004-06-30 JP JP2005511155A patent/JP4841249B2/ja not_active Expired - Fee Related
- 2004-06-30 WO PCT/JP2004/009589 patent/WO2005001939A1/ja active Application Filing
- 2004-06-30 TW TW093119369A patent/TW200507289A/zh unknown
- 2004-06-30 US US10/544,903 patent/US7187017B2/en not_active Expired - Fee Related
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1750308A2 (en) | 2005-08-04 | 2007-02-07 | Avago Technologies Sensor IP (Singapore) Pte. Ltd. | Reduced crosstalk CMOS image sensors |
EP1750308A3 (en) * | 2005-08-04 | 2009-03-11 | Avago Technologies Sensor IP (Singapore) Pte. Ltd. | Reduced crosstalk CMOS image sensors |
US7592654B2 (en) | 2005-08-04 | 2009-09-22 | Aptina Imaging Corporation | Reduced crosstalk CMOS image sensors |
US7652313B2 (en) * | 2005-11-10 | 2010-01-26 | International Business Machines Corporation | Deep trench contact and isolation of buried photodetectors |
JP2016152272A (ja) * | 2015-02-16 | 2016-08-22 | エスアイアイ・セミコンダクタ株式会社 | 受光素子を有する光検出半導体装置 |
TWI666784B (zh) * | 2015-02-16 | 2019-07-21 | 日商艾普凌科有限公司 | 具有受光元件之光檢測半導體裝置 |
JP2018518838A (ja) * | 2015-12-29 | 2018-07-12 | 同方威視技術股▲分▼有限公司 | 同一面電極のフォトダイオードアレイ及びその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
US20060145202A1 (en) | 2006-07-06 |
JP4841249B2 (ja) | 2011-12-21 |
US7187017B2 (en) | 2007-03-06 |
CN1762055A (zh) | 2006-04-19 |
TW200507289A (en) | 2005-02-16 |
JPWO2005001939A1 (ja) | 2006-08-10 |
CN100466270C (zh) | 2009-03-04 |
KR20060022709A (ko) | 2006-03-10 |
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