JP4365894B2 - 炭化珪素半導体素子の製造方法 - Google Patents
炭化珪素半導体素子の製造方法 Download PDFInfo
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- JP4365894B2 JP4365894B2 JP2009505675A JP2009505675A JP4365894B2 JP 4365894 B2 JP4365894 B2 JP 4365894B2 JP 2009505675 A JP2009505675 A JP 2009505675A JP 2009505675 A JP2009505675 A JP 2009505675A JP 4365894 B2 JP4365894 B2 JP 4365894B2
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- 229910010271 silicon carbide Inorganic materials 0.000 title claims description 94
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims description 91
- 239000004065 semiconductor Substances 0.000 title claims description 60
- 238000004519 manufacturing process Methods 0.000 title claims description 22
- 238000000034 method Methods 0.000 title claims description 18
- 239000010410 layer Substances 0.000 claims description 136
- 229910052751 metal Inorganic materials 0.000 claims description 78
- 239000002184 metal Substances 0.000 claims description 78
- 229910052710 silicon Inorganic materials 0.000 claims description 70
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 69
- 239000010703 silicon Substances 0.000 claims description 69
- 229910021332 silicide Inorganic materials 0.000 claims description 44
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 44
- 239000000758 substrate Substances 0.000 claims description 36
- 238000000151 deposition Methods 0.000 claims description 15
- 239000011229 interlayer Substances 0.000 claims description 14
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 239000012212 insulator Substances 0.000 claims description 6
- 239000010408 film Substances 0.000 description 100
- 239000010936 titanium Substances 0.000 description 25
- 238000010438 heat treatment Methods 0.000 description 22
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 17
- 229920005591 polysilicon Polymers 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 12
- 239000012535 impurity Substances 0.000 description 11
- 238000002513 implantation Methods 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 229910004298 SiO 2 Inorganic materials 0.000 description 6
- 229910008484 TiSi Inorganic materials 0.000 description 6
- 230000008021 deposition Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002161 passivation Methods 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910005883 NiSi Inorganic materials 0.000 description 1
- 229910005881 NiSi 2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000007736 thin film deposition technique Methods 0.000 description 1
- 229910052721 tungsten 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
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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
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/417—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions carrying the current to be rectified, amplified or switched
- H01L29/41725—Source or drain electrodes for field effect devices
- H01L29/41741—Source or drain electrodes for field effect devices for vertical or pseudo-vertical devices
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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
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/45—Ohmic electrodes
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- 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
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- 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
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- 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
- H01L21/0445—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 crystalline silicon carbide
- H01L21/0455—Making n or p doped regions or layers, e.g. using diffusion
- H01L21/046—Making n or p doped regions or layers, e.g. using diffusion using ion implantation
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- 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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- Ceramic Engineering (AREA)
- Computer Hardware Design (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Electrodes Of Semiconductors (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
Description
以下、図1を参照しながら、本発明による炭化珪素半導体素子の実施形態を説明する。
次に、図2から図8を参照しながら、本発明による炭化珪素半導体素子の製造方法の実施形態を説明する。
以下、図9および図10を参照しながら、本発明による炭化珪素半導体素子の製造方法の他の実施形態を説明する。
11 炭化珪素基板
12 半導体層
13 p型ウェル領域
14 n型ソース領域
15 p+型コンタクト注入領域
16 チャネル層
17 ゲート絶縁膜
18 ゲート電極
18A ゲート電極のシリコン下層
18B ゲート電極のシリサイド上層
19 層間絶縁膜
21、22 マスク
23、34 マスク
30 絶縁膜
31 サイドウォールスペーサ
32 第1の金属
41、42 露出面
1as ソース電極
1ag ゲート電極とオーミック接合する電極
1bs ソースバッド(上部配線電極)
1bg ゲートパッド
1c パッシベーション層
1f 金属電極層
Claims (6)
- 炭化珪素エピタキシャル層が表面に形成された炭化珪素基板を用意する工程と、
前記炭化珪素エピタキシャル層にソース領域を形成する工程と、
前記炭化珪素エピタキシャル層上にゲート絶縁膜を形成する工程と、
前記ゲート絶縁膜上にシリコンゲート電極を形成する工程と、
前記シリコンゲート電極の側面を絶縁物で覆う工程と、
前記シリコンゲート電極の上面に接触する第1の金属を堆積する工程と、
前記シリコンゲート電極の一部と前記第1の金属とを反応させることにより、第1の金属シリサイドからなる上層およびシリコンからなる下層を有するゲート電極を形成する工程と、
前記第1の金属のうちで前記シリコンゲート電極と反応しなかった未反応部分を除去する工程と、
開口部を前記ソース領域上に有する層間絶縁膜を形成する工程と、
前記開口部を介して前記ソース領域の一部に接触する第2の金属を前記層間絶縁膜上に堆積する工程と、
前記ソース領域の一部と前記第2の金属とを反応させることにより、前記ソース領域上に第2の金属シリサイドからなる層を形成する工程と、
を含み、
前記シリコンゲート電極の側面を絶縁物で覆う工程は、
絶縁膜を堆積する工程と、
前記絶縁膜のエッチバックを行うことによって前記シリコンゲート電極の側面にサイドウォールスペーサを形成する工程と、
を含み、
前記シリコンゲート電極の一部と前記第1の金属とを反応させるとき、前記第1の金属の一部は前記ソース領域に接触した状態にある、炭化珪素半導体素子の製造方法。 - 前記シリコンゲート電極の一部と前記第1の金属とを反応させるとき、
前記第1の金属とシリコンとの間でシリサイド化が生じ、かつ、前記第1の金属と炭化珪素との間でシリサイド化が生じない温度に前記第1の金属を加熱する、請求項1に記載の炭化珪素半導体素子の製造方法。 - 前記第1の金属はTiであり、
前記温度は、650℃以上850℃以下の範囲にある、請求項2に記載の炭化珪素半導体素子の製造方法。 - 前記絶縁膜のエッチバックを行うことによって前記シリコンゲート電極の側面にサイドウォールスペーサを形成する工程において、
前記絶縁膜のうちで前記シリコンゲート電極の上面に接触する部分の少なくとも一部が除去されることにより、前記シリコンゲート電極の上面の少なくとも一部が露出する、請求項1に記載の炭化珪素半導体素子の製造方法。 - 前記第2の金属はNiを含む請求項1に記載の炭化珪素半導体素子の製造方法。
- 前記第1の金属の厚さは、前記シリコンゲート電極の厚さの1/2より小さい、請求項1に記載の炭化珪素半導体素子の製造方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007205204 | 2007-08-07 | ||
JP2007205204 | 2007-08-07 | ||
PCT/JP2008/002073 WO2009019837A1 (ja) | 2007-08-07 | 2008-08-01 | 炭化珪素半導体素子およびその製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP4365894B2 true JP4365894B2 (ja) | 2009-11-18 |
JPWO2009019837A1 JPWO2009019837A1 (ja) | 2010-10-28 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009505675A Active JP4365894B2 (ja) | 2007-08-07 | 2008-08-01 | 炭化珪素半導体素子の製造方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7829416B2 (ja) |
JP (1) | JP4365894B2 (ja) |
CN (1) | CN101548387B (ja) |
WO (1) | WO2009019837A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101319469B1 (ko) * | 2010-11-25 | 2013-10-17 | 미쓰비시덴키 가부시키가이샤 | 반도체장치 |
WO2015008336A1 (ja) * | 2013-07-16 | 2015-01-22 | 株式会社日立製作所 | 半導体装置およびその製造方法 |
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KR101437961B1 (ko) * | 2010-11-25 | 2014-09-11 | 미쓰비시덴키 가부시키가이샤 | 반도체장치 |
US9041007B2 (en) | 2010-11-25 | 2015-05-26 | Mitsubishi Electric Corporation | Semiconductor device |
KR101642753B1 (ko) * | 2010-11-25 | 2016-07-26 | 미쓰비시덴키 가부시키가이샤 | 반도체장치 |
US9842906B2 (en) | 2010-11-25 | 2017-12-12 | Mitsubishi Electric Corporation | Semiconductor device |
WO2015008336A1 (ja) * | 2013-07-16 | 2015-01-22 | 株式会社日立製作所 | 半導体装置およびその製造方法 |
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CN101548387A (zh) | 2009-09-30 |
US7829416B2 (en) | 2010-11-09 |
WO2009019837A1 (ja) | 2009-02-12 |
CN101548387B (zh) | 2012-03-21 |
JPWO2009019837A1 (ja) | 2010-10-28 |
US20100075474A1 (en) | 2010-03-25 |
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