JP7504066B2 - 炭化珪素半導体装置および電力変換装置 - Google Patents
炭化珪素半導体装置および電力変換装置 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 90
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims description 60
- 229910010271 silicon carbide Inorganic materials 0.000 title claims description 59
- 238000006243 chemical reaction Methods 0.000 title claims description 42
- 230000001681 protective effect Effects 0.000 claims description 76
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 44
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 44
- 239000000758 substrate Substances 0.000 claims description 15
- 230000005684 electric field Effects 0.000 claims description 14
- 229920001721 polyimide Polymers 0.000 description 29
- 239000004642 Polyimide Substances 0.000 description 27
- 239000010410 layer Substances 0.000 description 26
- 239000012535 impurity Substances 0.000 description 19
- 239000011229 interlayer Substances 0.000 description 16
- 208000028659 discharge Diseases 0.000 description 15
- 239000003566 sealing material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
- H01L23/3157—Partial encapsulation or coating
- H01L23/3171—Partial encapsulation or coating the coating being directly applied to the semiconductor body, e.g. passivation layer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/564—Details not otherwise provided for, e.g. protection against moisture
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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
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/0603—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions
- H01L29/0607—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration
- H01L29/0611—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices
- H01L29/0615—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices by the doping profile or the shape or the arrangement of the PN junction, or with supplementary regions, e.g. junction termination extension [JTE]
- H01L29/0619—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices by the doping profile or the shape or the arrangement of the PN junction, or with supplementary regions, e.g. junction termination extension [JTE] with a supplementary region doped oppositely to or in rectifying contact with the semiconductor containing or contacting region, e.g. guard rings with PN or Schottky junction
-
- 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
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/16—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic Table
- H01L29/1608—Silicon carbide
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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
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/402—Field plates
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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
- H01L29/7811—Vertical DMOS transistors, i.e. VDMOS transistors with an edge termination structure
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Ceramic Engineering (AREA)
- Electrodes Of Semiconductors (AREA)
- Formation Of Insulating Films (AREA)
Description
図1は、実施の形態1に係る炭化珪素半導体装置100であるMOSFET(Metal-Oxide-Semiconductor Field-Effect Transistor)(SiC-MOSFET)の平面図であり、図2は、図1のA-A線に沿った断面図である。図1のように、炭化珪素半導体装置100のチップには、素子領域50と終端領域60とが規定されている。また、図2の断面図には、素子領域50と終端領域60との境界が含まれている。
図5は、実施の形態2に係る炭化珪素半導体装置101であるMOSFET(SiC-MOSFET)の断面図である。図5において、図2に示したものと同一の構成要素には、それと同一の符号を付している。そのため、実施の形態1で説明したものと同一の構成要素については、ここでの説明は省略する。
図6は、実施の形態3に係る炭化珪素半導体装置102であるMOSFET(SiC-MOSFET)の平面図であり、図7は、図6のA-A線に沿った断面図である。図6および図7において、図2に示したものと同一の構成要素には、それと同一の符号を付している。そのため、実施の形態1で説明したものと同一の構成要素については、ここでの説明を省略する。
本実施の形態は、上述した実施の形態1から3に係る半導体装置を電力変換装置に適用したものである。実施の形態1から3に係る半導体装置の適用は、特定の電力変換装置に限定されるものではないが、実施の形態4では、電力変換装置の例として三相のインバータを示す。
Claims (6)
- 炭化珪素からなる半導体基板と、
前記半導体基板上に設けられた第1導電型の半導体層と、
前記半導体層上に設けられた第1の主電極と、
前記半導体基板の裏面に設けられた第2の主電極と、
主電流が流れる素子領域の外側の終端領域において前記半導体層の上層部に設けられた第2導電型の電界緩和領域と、
前記半導体層上に設けられ、少なくとも前記電界緩和領域の一部を覆う第1の保護膜と、
前記第1の主電極の外側の端部、前記第1の保護膜および前記第1の保護膜よりも外側の前記半導体層の少なくとも一部を覆う窒化シリコン膜と、
前記窒化シリコン膜上に設けられた第2の保護膜と、
を備え、
前記窒化シリコン膜は、第2の保護膜の内側の端部および外側の端部の両方において、第2の保護膜よりも張り出している、
炭化珪素半導体装置。 - 前記第2の保護膜の内側の端部から前記窒化シリコン膜が張り出した長さは、前記第2の保護膜の外側の端部からの前記窒化シリコン膜が張り出した長さよりも短い、
請求項1に記載の炭化珪素半導体装置。 - 前記窒化シリコン膜は、前記炭化珪素半導体装置のチップ端部まで延在している、
請求項1または請求項2に記載の炭化珪素半導体装置。 - 前記窒化シリコン膜で覆われた前記第1の主電極の端部の側面が傾斜している、
請求項1から請求項3のいずれか一項に記載の炭化珪素半導体装置。 - 前記第1の保護膜の外側の端部を覆い、前記第1の保護膜の外側の端部に対応する段差を有する階段形状の額縁電極をさらに備え、
前記窒化シリコン膜は、前記額縁電極を覆っている、
請求項1から請求項4のいずれか一項に記載の炭化珪素半導体装置。 - 請求項1から請求項5のいずれか一項に記載の炭化珪素半導体装置を有し、入力される電力を変換して出力する主変換回路と、
前記主変換回路を制御する制御信号を前記主変換回路に出力する制御回路と、
を備えた電力変換装置。
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JP2021132674A JP7504066B2 (ja) | 2021-08-17 | 2021-08-17 | 炭化珪素半導体装置および電力変換装置 |
US17/852,284 US20230053501A1 (en) | 2021-08-17 | 2022-06-28 | Silicon carbide semiconductor device and power conversion apparatus |
DE102022119693.3A DE102022119693A1 (de) | 2021-08-17 | 2022-08-05 | Siliziumcarbid-Halbleitervorrichtung und Leistungsumwandlungseinrichtung |
CN202210969186.6A CN115706153A (zh) | 2021-08-17 | 2022-08-12 | 碳化硅半导体装置及电力变换装置 |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011027523A1 (ja) | 2009-09-03 | 2011-03-10 | パナソニック株式会社 | 半導体装置およびその製造方法 |
JP2012009811A (ja) | 2010-05-26 | 2012-01-12 | Mitsubishi Electric Corp | 半導体装置 |
WO2018078799A1 (ja) | 2016-10-28 | 2018-05-03 | 三菱電機株式会社 | 半導体装置および電力変換装置 |
WO2019189242A1 (ja) | 2018-03-30 | 2019-10-03 | ローム株式会社 | 半導体装置 |
WO2019208755A1 (ja) | 2018-04-27 | 2019-10-31 | 三菱電機株式会社 | 半導体装置および電力変換装置 |
JP2020170788A (ja) | 2019-04-03 | 2020-10-15 | 株式会社デンソー | 半導体装置 |
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- 2022-06-28 US US17/852,284 patent/US20230053501A1/en active Pending
- 2022-08-05 DE DE102022119693.3A patent/DE102022119693A1/de active Pending
- 2022-08-12 CN CN202210969186.6A patent/CN115706153A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011027523A1 (ja) | 2009-09-03 | 2011-03-10 | パナソニック株式会社 | 半導体装置およびその製造方法 |
JP2012009811A (ja) | 2010-05-26 | 2012-01-12 | Mitsubishi Electric Corp | 半導体装置 |
WO2018078799A1 (ja) | 2016-10-28 | 2018-05-03 | 三菱電機株式会社 | 半導体装置および電力変換装置 |
WO2019189242A1 (ja) | 2018-03-30 | 2019-10-03 | ローム株式会社 | 半導体装置 |
WO2019208755A1 (ja) | 2018-04-27 | 2019-10-31 | 三菱電機株式会社 | 半導体装置および電力変換装置 |
JP2020170788A (ja) | 2019-04-03 | 2020-10-15 | 株式会社デンソー | 半導体装置 |
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DE102022119693A1 (de) | 2023-02-23 |
CN115706153A (zh) | 2023-02-17 |
US20230053501A1 (en) | 2023-02-23 |
JP2023027528A (ja) | 2023-03-02 |
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