JP2018082017A - 炭化珪素半導体装置の製造方法 - Google Patents
炭化珪素半導体装置の製造方法 Download PDFInfo
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 82
- 239000004065 semiconductor Substances 0.000 title claims abstract description 61
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 239000010410 layer Substances 0.000 claims abstract description 83
- 239000000758 substrate Substances 0.000 claims abstract description 51
- 238000005224 laser annealing Methods 0.000 claims abstract description 26
- 239000002344 surface layer Substances 0.000 claims abstract description 14
- 230000001678 irradiating effect Effects 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims description 29
- 238000005468 ion implantation Methods 0.000 claims description 20
- 239000011229 interlayer Substances 0.000 claims description 13
- 150000002500 ions Chemical class 0.000 claims description 10
- 230000035515 penetration Effects 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 6
- 238000002513 implantation Methods 0.000 claims description 3
- 238000000151 deposition Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 22
- 238000010438 heat treatment Methods 0.000 description 14
- TVZRAEYQIKYCPH-UHFFFAOYSA-N 3-(trimethylsilyl)propane-1-sulfonic acid Chemical compound C[Si](C)(C)CCCS(O)(=O)=O TVZRAEYQIKYCPH-UHFFFAOYSA-N 0.000 description 12
- 238000000137 annealing Methods 0.000 description 11
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 9
- 230000007547 defect Effects 0.000 description 6
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000004913 activation Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000000206 photolithography Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- JGRGMDZIEXDEQT-UHFFFAOYSA-N [Cl].[Xe] Chemical compound [Cl].[Xe] JGRGMDZIEXDEQT-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 125000004437 phosphorous atom Chemical group 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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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
- H01L29/66007—Multistep manufacturing processes
- H01L29/66053—Multistep manufacturing processes of devices having a semiconductor body comprising crystalline silicon carbide
- H01L29/66068—Multistep manufacturing processes of devices having a semiconductor body comprising crystalline silicon carbide 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L21/26—Bombardment with radiation
- H01L21/263—Bombardment with radiation with high-energy radiation
- H01L21/2636—Bombardment with radiation with high-energy radiation for heating, e.g. electron beam heating
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L21/26—Bombardment with radiation
- H01L21/263—Bombardment with radiation with high-energy radiation
- H01L21/268—Bombardment with radiation with high-energy radiation using electromagnetic radiation, e.g. laser radiation
-
- 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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- 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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Abstract
【解決手段】炭化珪素半導体装置の製造方法は、n型炭化珪素基板1上にn型ドリフト層2、p型エピベース層3を順に堆積する。次に、p型エピベース層3の表面層にn型ソース領域4およびp型ベースコンタクト領域5を形成する。次に、n型ソース領域4の表面層およびp型ベースコンタクト領域5の表面層にレーザーを照射することによりレーザーアニールを行う。
【選択図】図1
Description
Ron,sp=4BV2/εSiCμEC 3
図1は、実施の形態にかかる炭化珪素半導体装置の構造を示す断面図である。図1に示すように、実施の形態にかかる炭化珪素半導体装置は、n型炭化珪素基板(第1導電型の炭化珪素半導体基板)1の第1主面(おもて面)、例えば(0001)面(Si面)に、n型ドリフト層(第1導電型のドリフト層)2が堆積されている。
次に、実施の形態にかかる炭化珪素半導体装置の製造方法について説明する。図2、図3は、実施の形態にかかる炭化珪素半導体装置の製造途中の状態を模式的に示す断面図である。
2 n型ドリフト層
3 p型エピベース層
4 n型ソース領域
5 p型ベースコンタクト領域
6 トレンチ
7 ゲート酸化膜
8 ゲート電極
9 層間絶縁膜
10 ソース電極
11 ドレイン電極
101 オーミックコンタクト電極
102 n型半導体基板
103 n型ドリフト層
104 p型ベース層
105 n型ソース領域
106 p型ベースコンタクト領域
107 トレンチ
108 ゲート酸化膜
109 ゲート電極
110 層間絶縁膜
111 ソース電極
a らせん転位
Claims (3)
- 第1導電型の炭化珪素半導体基板のおもて面側の全面に第1導電型のドリフト層を積層する工程と、
前記ドリフト層の全面に第2導電型のベース層を積層する工程と、
前記ベース層の表面層に第1導電型のソース領域をイオン注入により選択的に形成する工程と、
前記ベース層の表面層に第2導電型の不純物領域をイオン注入により選択的に形成する工程と、
前記ソース領域の表面層および前記不純物領域の表面層にレーザーを照射することによりレーザーアニールを行う工程と、
前記ソース領域を貫通するようにトレンチを形成する工程と、
前記トレンチの内部に、ゲート酸化膜を介してゲート電極を形成する工程と、
前記ゲート電極を覆うように層間絶縁膜を形成する工程と、
前記ソース領域および前記不純物領域に接するようにソース電極を形成する工程と、
前記炭化珪素半導体基板の裏面側にドレイン電極を形成する工程と、
を含むことを特徴とする炭化珪素半導体装置の製造方法。 - 前記レーザーアニールを行う工程は、前記レーザーの侵入長を前記イオン注入により注入したイオン種の注入深さ以上とすることを特徴とする請求項1に記載の炭化珪素半導体装置の製造方法。
- 前記レーザーアニールを行う工程は、前記ソース領域および前記不純物領域が形成された前記炭化珪素半導体基板を加熱して、レーザーを照射することを特徴とする請求項1または2に記載の炭化珪素半導体装置の製造方法。
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JP2016222772A JP6870286B2 (ja) | 2016-11-15 | 2016-11-15 | 炭化珪素半導体装置の製造方法 |
US15/724,181 US20180138287A1 (en) | 2016-11-15 | 2017-10-03 | Method of manufacturing silicon carbide semiconductor device |
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JP2016222772A JP6870286B2 (ja) | 2016-11-15 | 2016-11-15 | 炭化珪素半導体装置の製造方法 |
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JP (1) | JP6870286B2 (ja) |
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JP6822088B2 (ja) | 2016-11-15 | 2021-01-27 | 富士電機株式会社 | 炭化珪素半導体装置および炭化珪素半導体装置の製造方法 |
CN114530504B (zh) * | 2022-02-14 | 2023-10-10 | 南京晟芯半导体有限公司 | 一种高阈值电压SiC MOSFET器件及其制造方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06216157A (ja) * | 1993-01-18 | 1994-08-05 | Semiconductor Energy Lab Co Ltd | Mis型半導体装置の作製方法 |
JP2012124263A (ja) * | 2010-12-07 | 2012-06-28 | Sumitomo Electric Ind Ltd | 半導体装置の製造方法 |
JP2013214658A (ja) * | 2012-04-03 | 2013-10-17 | Denso Corp | 炭化珪素半導体装置およびその製造方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06124913A (ja) * | 1992-06-26 | 1994-05-06 | Semiconductor Energy Lab Co Ltd | レーザー処理方法 |
JP3211394B2 (ja) * | 1992-08-13 | 2001-09-25 | ソニー株式会社 | 半導体装置の製造方法 |
WO1997042652A1 (en) * | 1996-05-08 | 1997-11-13 | Advanced Micro Devices, Inc. | Control of junction depth and channel length using generated interstitial gradients to oppose dopant diffusion |
WO2003067666A1 (fr) * | 2002-02-07 | 2003-08-14 | Matsushita Electric Industrial Co., Ltd. | Dispositif a semi-conducteur et son procede de production |
JP2007243080A (ja) * | 2006-03-13 | 2007-09-20 | Fuji Electric Holdings Co Ltd | 半導体装置およびその製造方法 |
US8415671B2 (en) * | 2010-04-16 | 2013-04-09 | Cree, Inc. | Wide band-gap MOSFETs having a heterojunction under gate trenches thereof and related methods of forming such devices |
JP2014146757A (ja) * | 2013-01-30 | 2014-08-14 | National Institute Of Advanced Industrial & Technology | 炭化珪素半導体装置の製造方法 |
US20170213908A1 (en) * | 2014-07-25 | 2017-07-27 | United Silicon Carbide, Inc. | Self-aligned shielded-gate trench mos-controlled silicon carbide switch with reduced miller capacitance and method of manufacturing the same |
-
2016
- 2016-11-15 JP JP2016222772A patent/JP6870286B2/ja active Active
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- 2017-10-03 US US15/724,181 patent/US20180138287A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06216157A (ja) * | 1993-01-18 | 1994-08-05 | Semiconductor Energy Lab Co Ltd | Mis型半導体装置の作製方法 |
JP2012124263A (ja) * | 2010-12-07 | 2012-06-28 | Sumitomo Electric Ind Ltd | 半導体装置の製造方法 |
JP2013214658A (ja) * | 2012-04-03 | 2013-10-17 | Denso Corp | 炭化珪素半導体装置およびその製造方法 |
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