JP6505466B2 - 半導体装置及びその製造方法 - Google Patents
半導体装置及びその製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 59
- 238000004519 manufacturing process Methods 0.000 title claims description 33
- 229910052805 deuterium Inorganic materials 0.000 claims description 90
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims description 87
- 238000000034 method Methods 0.000 claims description 35
- 229910052739 hydrogen Inorganic materials 0.000 claims description 32
- 239000001257 hydrogen Substances 0.000 claims description 32
- 238000010438 heat treatment Methods 0.000 claims description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 18
- 150000002431 hydrogen Chemical class 0.000 claims description 16
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- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
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- 239000010410 layer Substances 0.000 description 137
- 229910010271 silicon carbide Inorganic materials 0.000 description 84
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 76
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 39
- 239000012535 impurity Substances 0.000 description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 35
- 229910052799 carbon Inorganic materials 0.000 description 35
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- 238000000137 annealing Methods 0.000 description 28
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 25
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- 229910052698 phosphorus Inorganic materials 0.000 description 20
- 239000011574 phosphorus Substances 0.000 description 20
- 230000008569 process Effects 0.000 description 19
- 230000004888 barrier function Effects 0.000 description 18
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 16
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 10
- 238000005121 nitriding Methods 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
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- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 2
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
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- 238000002513 implantation Methods 0.000 description 2
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- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
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- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
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- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
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- 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
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- 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
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Description
本実施形態の半導体装置は、{000−1}面に対し0度以上10度以下傾斜した表面を有するSiC層と、ゲート電極と、上記表面とゲート電極との間に設けられるゲート絶縁膜と、上記表面とゲート絶縁膜との間に設けられ、重水素(D)の最大濃度が1×1020cm−3以上、水素(H)の最大濃度が1×1019cm−3以下の領域と、を備える。
本実施形態の半導体装置は、SiC層の表面が法線方向が<000−1>方向に対し80度以上90度以下傾斜した表面であること以外は、第1の実施形態と同様である。したがって、第1の実施形態と重複する内容については記述を省略する。
本実施形態の半導体装置は、トレンチゲート型のMISFETである点で、第1の実施形態と異なる。第1の実施形態と重複する内容については記述を省略する。
本実施形態の半導体装置は、MISFETではなく、IGBTであること以外は、第1の実施形態と同様である。したがって、第1の実施形態と重複する内容については記述を省略する。
本実施形態の半導体装置は、{0001}面に対し0度以上10度以下傾斜した表面を有するSiC層と、ゲート電極と、表面とゲート電極との間に設けられるゲート絶縁膜と、SiC層とゲート絶縁膜との間に設けられ、重水素(D)の最大濃度が1×1019cm−3以上、窒素(N)又はリン(P)の最大濃度が1×1021cm−3以上の領域と、を備える。
28 ゲート絶縁膜
30 ゲート電極
40 界面領域(領域)
60 界面領域(領域)
100 MISFET(半導体装置)
200 MISFET(半導体装置)
300 MISFET(半導体装置)
400 IGBT(半導体装置)
500 MISFET(半導体装置)
Claims (12)
- {000−1}面に対し0度以上10度以下傾斜した表面、又は、法線方向が<000−1>方向に対し80度以上90度以下傾斜した表面を有するSiC層と、
ゲート電極と、
前記表面と前記ゲート電極との間に設けられるゲート絶縁膜と、
前記表面と前記ゲート絶縁膜との間に設けられ、重水素(D)の最大濃度が1×1020cm−3以上、水素(H)の最大濃度が1×1019cm−3以下の領域と、
を備え、
前記領域中の重水素の濃度分布がピークを有し、前記ピークの半値全幅が10nm以下である半導体装置。 - 前記領域中の重水素の最大濃度が1×1021cm−3以上である請求項1記載の半導体装置。
- 前記ゲート絶縁膜はシリコン酸化膜である請求項1又は請求項2記載の半導体装置。
- {000−1}面に対し0度以上10度以下傾斜した表面、又は、法線方向が<000−1>方向に対し80度以上90度以下傾斜した表面を有するSiC層の前記表面の上に、ゲート絶縁膜を形成し、
前記ゲート絶縁膜の形成後に、重水素を含む雰囲気中で第1の熱処理を行い、
前記第1の熱処理の後に、前記ゲート絶縁膜の上にゲート電極を形成し、
前記第1の熱処理が900℃以上である半導体装置の製造方法。 - 前記ゲート絶縁膜がシリコン酸化膜である請求項4記載の半導体装置の製造方法。
- 前記第1の熱処理の後に、800℃以上の第2の熱処理を、更に行う請求項4又は請求項5記載の半導体装置の製造方法。
- 前記ゲート絶縁膜が堆積膜である請求項4乃至請求項6いずれか一項記載の半導体装置の製造方法。
- 前記ゲート絶縁膜が熱酸化膜である請求項4乃至請求項6いずれか一項記載の半導体装置の製造方法。
- {000−1}面に対し0度以上10度以下傾斜した表面、又は、法線方向が<000−1>方向に対し80度以上90度以下傾斜した表面を有するSiC層の前記表面の上に、重水素及び酸素を含む雰囲気中で前記表面を熱酸化することによりゲート絶縁膜を形成し、
前記ゲート絶縁膜の上にゲート電極を形成する半導体装置の製造方法。 - 前記表面を熱酸化した後、絶縁膜を堆積することにより前記ゲート絶縁膜を形成する請求項9記載の半導体装置の製造方法。
- 前記絶縁膜がシリコン酸化膜である請求項10記載の半導体装置の製造方法。
- 前記熱酸化が800℃以上である請求項9乃至請求項11いずれか一項記載の半導体装置の製造方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2015033595A JP6505466B2 (ja) | 2015-02-24 | 2015-02-24 | 半導体装置及びその製造方法 |
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US20160005871A1 (en) * | 2014-07-04 | 2016-01-07 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device |
CN107406966B (zh) | 2015-03-03 | 2020-11-20 | 株式会社半导体能源研究所 | 氧化物半导体膜、包括该氧化物半导体膜的半导体装置以及包括该半导体装置的显示装置 |
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CN106847879B (zh) * | 2017-01-19 | 2021-12-03 | 北京世纪金光半导体有限公司 | 一种斜面沟道的SiC MOSFET器件及制备方法 |
CN107508281B (zh) * | 2017-08-10 | 2020-03-20 | 西南交通大学 | 一种同相供电系统潮流控制器动态可靠性评估方法 |
US10504735B2 (en) * | 2017-09-29 | 2019-12-10 | Taiwan Semiconductor Manufacturing Co., Ltd. | Method of forming a semiconductor device by high-pressure anneal and post-anneal treatment |
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