JP2005197682A - Cmosイメージセンサ及びその製造方法 - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 239000012535 impurity Substances 0.000 claims abstract description 61
- 239000000758 substrate Substances 0.000 claims abstract description 56
- 238000002955 isolation Methods 0.000 claims abstract description 49
- 239000004065 semiconductor Substances 0.000 claims abstract description 20
- 150000002500 ions Chemical group 0.000 claims description 54
- 238000005530 etching Methods 0.000 claims description 10
- 229910015900 BF3 Inorganic materials 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 4
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 claims description 4
- 238000002513 implantation Methods 0.000 claims description 2
- 238000005468 ion implantation Methods 0.000 abstract description 18
- 238000009413 insulation Methods 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 14
- 150000004767 nitrides Chemical class 0.000 description 11
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000002800 charge carrier Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 238000001505 atmospheric-pressure chemical vapour deposition Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 238000007517 polishing process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
- 238000001947 vapour-phase growth Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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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
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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
- H01L27/14683—Processes or apparatus peculiar to the manufacture or treatment of these devices or parts thereof
- H01L27/14689—MOS based technologies
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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
- H01L27/14609—Pixel-elements with integrated switching, control, storage or amplification elements
-
- 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
- H01L31/08—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
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- Condensed Matter Physics & Semiconductors (AREA)
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Abstract
【解決手段】本発明のCMOSイメージセンサの製造方法は、第1導電型の半導体基板にトレンチを形成する段階と、前記トレンチの側面部に高濃度の第1導電型不純物イオン領域を形成する段階と、前記トレンチに絶縁膜を設けて素子分離膜を形成する段階と、前記半導体基板上にゲート絶縁膜及びゲート電極を順次形成する段階と、前記ゲート電極と前記素子分離膜の間の基板内部にフォトダイオードのための第2導電型の不純物領域を形成する段階とを含むことを特徴とする。
【選択図】図4
Description
3つのトランジスタのうち、リセットトランジスタ(Rx)120は、フォトダイオード110で生成された光電荷を移送させる役割、及び信号検出のために電荷を排出する役割を果たし、ドライバートランジスタ(Dx)130はソースフォロワーとしての役割を果たす。又、セレクトトランジスタ(Sx)140はスイッチング及びアドレッシングのためのものである。
即ち、(P+)領域440は、フィールド領域の素子分離膜とフォトダイオード領域の間の境界面に形成されている。
図4に示したように、 P++型半導体基板401上にP-型エピ層が形成されている。また、半導体基板401のアクティブ領域を隔離するために基板401のフィールド領域に素子分離膜406aが形成されている。基板401のアクティブ領域となった領域上にはゲート絶縁膜122とゲート電極123が順次に形成されており、ゲート電極123及びゲート絶縁膜122の側壁にはスペーサー129が形成されている。
tanθ= W/(H1+H2)
123 ゲート電極
129 スペーサー
401 半導体基板
406a 素子分離膜
409 フォトダイオードのための低濃度の第2導電型不純物イオン領域
411 中濃度の第1導電型不純物イオン領域
440 高濃度の第1導電型不純物イオン領域
Claims (10)
- フィールド領域によって区画されるアクティブ領域を具備する第1導電型の半導体基板と、
前記アクティブ領域の所定の部位に形成されているフォトダイオードと、
前記フォトダイオードの周縁に沿って形成された素子分離膜と、
前記素子分離膜の側面部に形成されている高濃度の第1導電型不純物イオン領域とを含むことを特徴とするCMOSイメージセンサ。 - 前記高濃度の第1導電型不純物イオン領域は100〜300Åの幅で形成することを特徴とする請求項1に記載のCMOSイメージセンサ。
- 前記高濃度の第1導電型不純物イオンはホウ素(B)又はフッ化ホウ素(BF2)のうち、何れか一つであることを特徴とする請求項1に記載のCMOSイメージセンサ。
- 第1導電型の半導体基板にトレンチを形成する段階と、
前記トレンチの左右側部の基板内部に高濃度の第1導電型不純物イオン領域を形成する段階と、
前記トレンチに絶縁膜を形成させて素子分離膜を形成する段階と、
前記半導体基板上にゲート絶縁膜及びゲート電極を順次形成する段階と、
前記ゲート電極と前記素子分離膜の間の基板内部にフォトダイオードのための第2導電型の不純物領域を形成する段階とを含むことを特徴とするCMOSイメージセンサの製造方法。 - 前記トレンチ形成段階は、
半導体基板上に犠牲酸化膜とハードマスク層を順次積層する過程と、
前記基板のフィールド領域に前記犠牲酸化膜及びハードマスク層の開口部を形成させ、前記開口部内の基板の表面を露出させる過程と、
前記ハードマスク層をエッチング食刻マスクとして用いて前記露出した基板にトレンチを形成する過程とで構成されることを特徴とする請求項4に記載のCMOSイメージセンサの製造方法。 - 前記高濃度の第1導電型不純物イオン領域を形成する段階は、
高濃度の第1導電型不純物イオンを前記基板に所定の角度だけ傾斜した角度(θ)でトレンチの一側部又は両側部に注入することを特徴とする請求項4に記載のCMOSイメージ
センサの製造方法。 - 前記傾斜した角度(θ)は
tanθ= W/(H1+H2)の式であり、
前記Wは前記素子分離膜とゲート電極の間の幅、前記H1はフォトダイオード領域のための第2導電型の不純物イオン領域の深さ、前記H2は前記中濃度又は高濃度の第1導電型不純物イオン注入時に使われる感光膜パターンの高さであることを特徴とする請求項6に記載のCMOSイメージセンサの製造方法。 - 高濃度の第1導電型不純物イオン領域は100〜300Åの幅で形成することを特徴とする請求項4に記載のCMOSイメージセンサの製造方法。
- 前記高濃度の第1導電型不純物イオンはホウ素(B)又はフッ化ホウ素(BF2)イオンのうち、何れかのイオンであることを特徴とする請求項4に記載のCMOSイメージセンサの製造方法。
- 前記高濃度の第1導電型不純物イオン領域は、第1導電型の不純物イオンを1E12〜1E15 ions/cm2の濃度で注入して形成することを特徴とする請求項4に記載のCMOSイメージセンサの製造方法。
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KR1020030101553A KR100619396B1 (ko) | 2003-12-31 | 2003-12-31 | 시모스 이미지 센서 및 그 제조방법 |
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US (1) | US7358108B2 (ja) |
JP (1) | JP4051059B2 (ja) |
KR (1) | KR100619396B1 (ja) |
CN (1) | CN100530663C (ja) |
DE (1) | DE102004063037A1 (ja) |
Cited By (9)
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JP2007067401A (ja) * | 2005-08-26 | 2007-03-15 | Magnachip Semiconductor Ltd | イメージセンサ及びその製造方法 |
JP2007081358A (ja) * | 2005-09-14 | 2007-03-29 | Magnachip Semiconductor Ltd | Cmosイメージセンサ及びその製造方法 |
JP2007201087A (ja) * | 2006-01-25 | 2007-08-09 | Fujifilm Corp | 固体撮像素子の製造方法及び固体撮像素子 |
JP2007201088A (ja) * | 2006-01-25 | 2007-08-09 | Fujifilm Corp | 固体撮像素子 |
WO2007097062A1 (ja) * | 2006-02-21 | 2007-08-30 | Matsushita Electric Industrial Co., Ltd. | 固体撮像装置 |
JP2009272597A (ja) * | 2008-04-09 | 2009-11-19 | Sony Corp | 固体撮像装置とその製造方法、及び電子機器 |
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JP3904676B2 (ja) * | 1997-04-11 | 2007-04-11 | 株式会社ルネサステクノロジ | トレンチ型素子分離構造の製造方法およびトレンチ型素子分離構造 |
JP2003142674A (ja) | 2001-11-07 | 2003-05-16 | Toshiba Corp | Mos型固体撮像装置 |
JP3723124B2 (ja) | 2001-12-14 | 2005-12-07 | 株式会社東芝 | 固体撮像装置 |
KR100494030B1 (ko) * | 2002-01-10 | 2005-06-10 | 매그나칩 반도체 유한회사 | 이미지센서 및 그 제조 방법 |
JP2003318379A (ja) | 2002-04-22 | 2003-11-07 | Sony Corp | 光電変換装置及びその製造方法 |
JP2004039832A (ja) | 2002-07-03 | 2004-02-05 | Sony Corp | 光電変換装置及びその製造方法 |
US6949445B2 (en) * | 2003-03-12 | 2005-09-27 | Micron Technology, Inc. | Method of forming angled implant for trench isolation |
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2003
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2004
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- 2004-12-27 CN CNB2004101026876A patent/CN100530663C/zh not_active Expired - Fee Related
- 2004-12-28 US US11/022,890 patent/US7358108B2/en active Active
- 2004-12-28 DE DE102004063037A patent/DE102004063037A1/de not_active Withdrawn
Cited By (12)
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JP2007067401A (ja) * | 2005-08-26 | 2007-03-15 | Magnachip Semiconductor Ltd | イメージセンサ及びその製造方法 |
US8476685B2 (en) | 2005-08-26 | 2013-07-02 | Intellectual Ventures Ii Llc | Image sensor and method for fabricating the same |
JP2007081358A (ja) * | 2005-09-14 | 2007-03-29 | Magnachip Semiconductor Ltd | Cmosイメージセンサ及びその製造方法 |
US8120062B2 (en) | 2005-09-14 | 2012-02-21 | Intellectual Ventures Ii Llc | Complementary metal oxide semiconductor image sensor and method for fabricating the same |
US8815628B2 (en) | 2005-09-14 | 2014-08-26 | Intellectual Ventures Ii Llc | Complementary metal oxide semiconductor image sensor and method for fabricating the same |
JP2007201087A (ja) * | 2006-01-25 | 2007-08-09 | Fujifilm Corp | 固体撮像素子の製造方法及び固体撮像素子 |
JP2007201088A (ja) * | 2006-01-25 | 2007-08-09 | Fujifilm Corp | 固体撮像素子 |
WO2007097062A1 (ja) * | 2006-02-21 | 2007-08-30 | Matsushita Electric Industrial Co., Ltd. | 固体撮像装置 |
JP2009272597A (ja) * | 2008-04-09 | 2009-11-19 | Sony Corp | 固体撮像装置とその製造方法、及び電子機器 |
US8728852B2 (en) | 2008-04-09 | 2014-05-20 | Sony Corporation | Solid-state imaging device, production method thereof, and electronic device |
JP2017054947A (ja) * | 2015-09-10 | 2017-03-16 | セイコーエプソン株式会社 | 固体撮像素子及びその製造方法、並びに、電子機器 |
WO2019106983A1 (ja) * | 2017-11-28 | 2019-06-06 | ソニーセミコンダクタソリューションズ株式会社 | 半導体装置および半導体装置の製造方法 |
Also Published As
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US20050156213A1 (en) | 2005-07-21 |
DE102004063037A1 (de) | 2005-08-11 |
KR20050070938A (ko) | 2005-07-07 |
CN1641883A (zh) | 2005-07-20 |
US7358108B2 (en) | 2008-04-15 |
CN100530663C (zh) | 2009-08-19 |
JP4051059B2 (ja) | 2008-02-20 |
KR100619396B1 (ko) | 2006-09-11 |
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