JP7313082B2 - 半導体パワーデバイスの製造方法 - Google Patents
半導体パワーデバイスの製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 41
- 239000004065 semiconductor Substances 0.000 title claims description 41
- 238000005530 etching Methods 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 31
- 239000000758 substrate Substances 0.000 claims description 30
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 210000000746 body region Anatomy 0.000 claims description 10
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 6
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 5
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 18
- 229920005591 polysilicon Polymers 0.000 description 18
- 238000010586 diagram Methods 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000000206 photolithography Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66674—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/66712—Vertical DMOS transistors, i.e. VDMOS transistors
- H01L29/66734—Vertical DMOS transistors, i.e. VDMOS transistors with a step of recessing the gate electrode, e.g. to form a trench gate electrode
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- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28026—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor
- H01L21/28035—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor the final conductor layer next to the insulator being silicon, e.g. polysilicon, with or without impurities
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- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
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- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28026—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor
- H01L21/28114—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor characterised by the sectional shape, e.g. T, inverted-T
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/308—Chemical or electrical treatment, e.g. electrolytic etching using masks
- H01L21/3083—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/308—Chemical or electrical treatment, e.g. electrolytic etching using masks
- H01L21/3083—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/3086—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane characterised by the process involved to create the mask, e.g. lift-off masks, sidewalls, or to modify the mask, e.g. pre-treatment, post-treatment
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/402—Field plates
- H01L29/407—Recessed field plates, e.g. trench field plates, buried field plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66674—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/66712—Vertical DMOS transistors, i.e. VDMOS transistors
- H01L29/66719—With a step of forming an insulating sidewall spacer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/7801—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/7802—Vertical DMOS transistors, i.e. VDMOS transistors
- H01L29/7813—Vertical DMOS transistors, i.e. VDMOS transistors with trench gate electrode, e.g. UMOS transistors
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- Computer Hardware Design (AREA)
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Description
n型基板上に第1絶縁層を形成し、前記第1絶縁層をエッチングして開口を形成することと、
前記開口内に絶縁側壁を形成することと、
前記第1絶縁層と前記絶縁側壁とをマスクとして、前記n型基板をエッチングして前記n型基板内に第1溝を形成することと、
前記第1溝内に第2絶縁層とシールドゲートとを形成することと、
前記シールドゲートの表面に第3絶縁層を形成することと、
前記絶縁側壁をエッチング除去し、前記第1絶縁層と、前記第2絶縁層と、前記第3絶縁層とをマスクとして、前記n型基板をエッチングして、前記n型基板内に第2溝を形成することと、を含む、
半導体パワーデバイスの製造方法、を提供する。
前記第2溝内に第4絶縁層とゲートとを形成し、前記ゲートは前記第2絶縁層によって前記シールドゲートと分離されることと、
前記第1絶縁層と前記第3絶縁層とをエッチング除去することと、
前記n型基板内にp型ボディ領域を形成することと、
前記p型ボディ領域内にn型ソース領域を形成することと、を更に含む。
前記第1絶縁層と前記第3絶縁層と前記第2溝の側壁位置における前記第2絶縁層とをエッチング除去することと、
前記第2溝内に第4絶縁層とゲートとを形成し、前記ゲートは前記第4絶縁層によって前記シールドゲートと分離されることと、
前記n型基板内にp型ボディ領域を形成することと、
前記p型ボディ領域内にn型ソース領域を形成することと、を更に含む。
Claims (9)
- n型基板上に第1絶縁層を形成し、前記第1絶縁層をエッチングして開口を形成することと、
前記開口内に絶縁側壁を形成することと、
前記第1絶縁層と前記絶縁側壁とをマスクとして前記n型基板をエッチングして、前記n型基板内に第1溝を形成することと、
前記第1溝内に、第2絶縁層とシールドゲートとを形成することと、
前記シールドゲートの表面に第3絶縁層を形成することと、
前記絶縁側壁をエッチング除去し、前記第1絶縁層と前記第2絶縁層と前記第3絶縁層とをマスクとして前記n型基板をエッチングして、前記n型基板内に第2溝を形成することと、
を含む、半導体パワーデバイスの製造方法。 - 前記第2溝内に、第4絶縁層とゲートとを形成し、前記ゲートは、前記第2絶縁層によって前記シールドゲートと分離されることと、
前記第1絶縁層と前記第3絶縁層とをエッチング除去することと、
前記n型基板内にp型ボディ領域を形成することと、
前記p型ボディ領域内にn型ソース領域を形成することと、
を更に含む、請求項1に記載の半導体パワーデバイスの製造方法。 - 前記第1絶縁層と、前記第3絶縁層と、前記第2溝の側壁位置における前記第2絶縁層とをエッチング除去することと、
前記第2溝内に、第4絶縁層とゲートとを形成し、前記ゲートは、前記第4絶縁層によって前記シールドゲートと分離されることと、
前記n型基板内にp型ボディ領域を形成することと、
前記p型ボディ領域内にn型ソース領域を形成することと、
を更に含む、請求項1に記載の半導体パワーデバイスの製造方法。 - 前記第1絶縁層は、酸化シリコン層を含む、
請求項1に記載の半導体パワーデバイスの製造方法。 - 前記第2絶縁層は、酸化シリコン層である、
請求項1に記載の半導体パワーデバイスの製造方法。 - 前記第3絶縁層は、酸化シリコン層である、
請求項1に記載の半導体パワーデバイスの製造方法。 - 前記絶縁側壁は、窒化シリコン層である、
請求項1に記載の半導体パワーデバイスの製造方法。 - 前記第2溝をエッチングで形成する時、異方性エッチングと等方性エッチングとを結合するエッチング方法を採用する、
請求項1に記載の半導体パワーデバイスの製造方法。 - 前記第2溝の深度は、前記第1溝の深度より小さい、
請求項1に記載の半導体パワーデバイスの製造方法。
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CN202011127631.1A CN112271134B (zh) | 2020-10-20 | 2020-10-20 | 半导体功率器件的制造方法 |
CN202011127631.1 | 2020-10-20 | ||
PCT/CN2020/128371 WO2022082902A1 (zh) | 2020-10-20 | 2020-11-12 | 半导体功率器件的制造方法 |
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WO2022082902A1 (zh) | 2022-04-28 |
KR102578494B1 (ko) | 2023-09-13 |
KR20230085939A (ko) | 2023-06-14 |
US20230268420A1 (en) | 2023-08-24 |
US12015078B2 (en) | 2024-06-18 |
CN112271134B (zh) | 2021-10-22 |
JP2023502811A (ja) | 2023-01-26 |
DE112020002907T5 (de) | 2022-06-15 |
KR102600345B1 (ko) | 2023-11-08 |
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CN112271134A (zh) | 2021-01-26 |
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