JP7271484B2 - 半導体装置、半導体装置の製造方法、インバータ回路、駆動装置、車両、及び、昇降機 - Google Patents
半導体装置、半導体装置の製造方法、インバータ回路、駆動装置、車両、及び、昇降機 Download PDFInfo
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- JP7271484B2 JP7271484B2 JP2020155006A JP2020155006A JP7271484B2 JP 7271484 B2 JP7271484 B2 JP 7271484B2 JP 2020155006 A JP2020155006 A JP 2020155006A JP 2020155006 A JP2020155006 A JP 2020155006A JP 7271484 B2 JP7271484 B2 JP 7271484B2
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- 239000004065 semiconductor Substances 0.000 title claims description 101
- 238000004519 manufacturing process Methods 0.000 title claims description 29
- 238000000034 method Methods 0.000 title description 23
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 204
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 200
- 239000001301 oxygen Substances 0.000 claims description 187
- 229910052760 oxygen Inorganic materials 0.000 claims description 187
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 186
- 239000012535 impurity Substances 0.000 claims description 72
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 65
- 238000005468 ion implantation Methods 0.000 claims description 34
- 125000004432 carbon atom Chemical group C* 0.000 claims description 28
- 238000009826 distribution Methods 0.000 claims description 24
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 21
- 229910052799 carbon Inorganic materials 0.000 claims description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000010410 layer Substances 0.000 description 86
- 229910052751 metal Inorganic materials 0.000 description 34
- 239000002184 metal Substances 0.000 description 34
- 239000013078 crystal Substances 0.000 description 24
- 230000004888 barrier function Effects 0.000 description 23
- 238000010586 diagram Methods 0.000 description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 21
- 238000000137 annealing Methods 0.000 description 21
- 229910021332 silicide Inorganic materials 0.000 description 17
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 17
- 229910052710 silicon Inorganic materials 0.000 description 14
- 239000000758 substrate Substances 0.000 description 13
- 229910052782 aluminium Inorganic materials 0.000 description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- 239000010703 silicon Substances 0.000 description 12
- 229910052757 nitrogen Inorganic materials 0.000 description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 8
- RUFLMLWJRZAWLJ-UHFFFAOYSA-N nickel silicide Chemical compound [Ni]=[Si]=[Ni] RUFLMLWJRZAWLJ-UHFFFAOYSA-N 0.000 description 8
- 229910021334 nickel silicide Inorganic materials 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000011229 interlayer Substances 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- 229910052719 titanium Inorganic materials 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 229910052786 argon Inorganic materials 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 229910000765 intermetallic Inorganic materials 0.000 description 4
- 150000004767 nitrides Chemical class 0.000 description 4
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052720 vanadium Inorganic materials 0.000 description 4
- -1 Oxygen ions Chemical class 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 238000004645 scanning capacitance microscopy Methods 0.000 description 3
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000027756 respiratory electron transport chain Effects 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910005883 NiSi Inorganic materials 0.000 description 1
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 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
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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- H01L29/7801—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
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Description
第1の実施形態の半導体装置は、電極と、電極に接する炭化珪素層であって、n型の第1の炭化珪素領域と、第1の炭化珪素領域と第1の電極との間に位置し、電極に接し、4個の炭素原子と結合する1個の酸素原子を含む第2の炭化珪素領域と、を含む炭化珪素層と、を備える。
第2の実施形態の半導体装置は、第1の電極と、第2の電極と、第1の電極が接する第1の面と、第1の面に対向し第2の電極が接する第2の面を有する炭化珪素層であって、n型の第1の炭化珪素領域と、第1の面と第1の炭化珪素領域との間に位置し、第1の炭化珪素領域よりもn型不純物濃度の低いn型の第2の炭化珪素領域と、第1の面と第2の炭化珪素領域との間に位置するp型の第3の炭化珪素領域と、第1の面と第3の炭化珪素領域との間に位置するn型の第4の炭化珪素領域と、第1の電極と第3の炭化珪素領域との間に設けられ、第1の電極に接し、第3の炭化珪素領域よりもp型不純物濃度の高いp型の第5の炭化珪素領域と、第1の電極と第4の炭化珪素領域との間に設けられ、第1の電極に接し、4個の炭素原子と結合する1個の酸素原子を含む第6の炭化珪素領域と、炭化珪素層の第1の電極の側に位置するゲート電極と、ゲート電極と第3の炭化珪素領域との間に位置するゲート絶縁層と、を備える。以下、第1の実施形態と重複する内容については、一部記述を省略する。
第3の実施形態の半導体装置は、第2の電極と第1の炭化珪素領域との間に設けられ、第2の電極に接し、4個の炭素原子と結合する1個の酸素原子を含む第7の炭化珪素領域を、更に備える点で、第2の実施形態の半導体装置と異なる。以下、第1の実施形態及び第2の実施形態と重複する内容については、一部記述を省略する場合がある。
第4の実施形態の半導体装置は、第1の電極が炭化珪素層の中に位置する金属シリサイド部を有する点で、第2の実施形態の半導体装置と異なる。以下、第1の実施形態及び第2の実施形態と重複する内容については、一部記述を省略する場合がある。
第5の実施形態のインバータ回路及び駆動装置は、第2の実施形態の半導体装置を備えるインバータ回路及び駆動装置である。
第6の実施形態の車両は、第2の実施形態の半導体装置を備える車両である。
第7の実施形態の車両は、第2の実施形態の半導体装置を備える車両である。
第8の実施形態の昇降機は、第2の実施形態の半導体装置を備える昇降機である。
12 コンタクト電極(電極)
18 コンタクト領域(第1の炭化珪素領域)
20 酸素領域(第2の炭化珪素領域)
22 酸化膜
24 積層膜(導電膜)
42 ソース電極(第1の電極)
44 ドレイン電極(第2の電極)
46 ゲート絶縁層
50 ゲート電極
54 ドレイン領域(第1の炭化珪素領域)
56 ドリフト領域(第2の炭化珪素領域)
58 pウェル領域(第3の炭化珪素領域)
60 ソース領域(第4の炭化珪素領域)
62 pウェルコンタクト領域(第5の炭化珪素領域)
64 第1の酸素領域(第6の炭化珪素領域)
66 第2の酸素領域(第7の炭化珪素領域)
100 コンタクト構造(半導体装置)
150 インバータ回路
200 MOSFET(半導体装置)
300 MOSFET(半導体装置)
400 MOSFET(半導体装置)
1000 駆動装置
1100 車両
1200 車両
1300 昇降機
P1 第1の面
P2 第2の面
Claims (21)
- 電極と、
前記電極に接する炭化珪素層であって、
n型の第1の炭化珪素領域と、
前記第1の炭化珪素領域と前記電極との間に位置し、前記電極に接し、4個の炭素原子と結合する1個の酸素原子を含む第2の炭化珪素領域と、
を含む炭化珪素層と、
を備える半導体装置。 - 前記第2の炭化珪素領域の酸素の最大濃度は1×1017cm-3以上1×1023cm-3以下である請求項1記載の半導体装置。
- 前記電極と前記第2の炭化珪素領域の中の酸素の濃度分布が第1のピークを有し、前記電極と前記第2の炭化珪素領域の界面と前記第1のピークとの間の距離が50nm以下である請求項1又は請求項2記載の半導体装置。
- 前記電極と前記第2の炭化珪素領域の中の酸素の濃度分布が、前記第1のピークと前記第1の炭化珪素領域との間に、第2のピークを有する請求項3記載の半導体装置。
- 前記第1の炭化珪素領域のn型不純物濃度は1×1019cm-3以上1×1023cm-3以下である請求項1ないし請求項4いずれか一項記載の半導体装置。
- 前記第2の炭化珪素領域の中に含まれる酸素原子の中で、4個の炭素原子と結合する酸素原子の割合が、4個のシリコン原子と結合する酸素原子の割合よりも高い請求項1ないし請求項5いずれか一項記載の半導体装置。
- 第1の電極と、
第2の電極と、
前記第1の電極が接する第1の面と、前記第1の面に対向し前記第2の電極が接する第2の面を有する炭化珪素層であって、
n型の第1の炭化珪素領域と、
前記第1の面と前記第1の炭化珪素領域との間に位置し、前記第1の炭化珪素領域よりもn型不純物濃度の低いn型の第2の炭化珪素領域と、
前記第1の面と前記第2の炭化珪素領域との間に位置するp型の第3の炭化珪素領域と、
前記第1の面と前記第3の炭化珪素領域との間に位置するn型の第4の炭化珪素領域と、
前記第1の電極と前記第3の炭化珪素領域との間に設けられ、前記第1の電極に接し、
前記第3の炭化珪素領域よりもp型不純物濃度の高いp型の第5の炭化珪素領域と、
前記第1の電極と前記第4の炭化珪素領域との間に設けられ、前記第1の電極に接し、4個の炭素原子と結合する1個の酸素原子を含む第6の炭化珪素領域と、
前記炭化珪素層の前記第1の電極の側に位置するゲート電極と、を含む炭化珪素層と、
前記ゲート電極と前記第3の炭化珪素領域との間に位置するゲート絶縁層と、
を備える半導体装置。 - 前記第6の炭化珪素領域の酸素の最大濃度は1×1017cm-3以上1×1023cm-3以下である請求項7記載の半導体装置。
- 前記第1の電極と前記第6の炭化珪素領域の中の酸素の濃度分布が第1のピークを有し、前記第1の電極と前記第6の炭化珪素領域の界面と前記第1のピークとの間の距離が50nm以下である請求項7又は請求項8記載の半導体装置。
- 前記第1の電極と前記第6の炭化珪素領域の中の酸素の濃度分布が、前記第1のピークと前記第4の炭化珪素領域との間に、第2のピークを有する請求項9記載の半導体装置。
- 前記第4の炭化珪素領域のn型不純物濃度は1×1019cm-3以上1×1023cm-3以下である請求項7ないし請求項10いずれか一項記載の半導体装置。
- 前記第6の炭化珪素領域の中に含まれる酸素原子の中で、4個の炭素原子と結合する酸素原子の割合が、4個のシリコン原子と結合する酸素原子の割合よりも高い請求項7ないし請求項11いずれか一項記載の半導体装置。
- 前記第2の電極と前記第1の炭化珪素領域との間に設けられ、前記第2の電極に接し、4個の炭素原子と結合する1個の酸素原子を含む第7の炭化珪素領域を、更に備える請求項7ないし請求項12いずれか一項記載の半導体装置。
- 請求項1ないし請求項13いずれか一項記載の半導体装置を備えるインバータ回路。
- 請求項1ないし請求項13いずれか一項記載の半導体装置を備える駆動装置。
- 請求項1ないし請求項13いずれか一項記載の半導体装置を備える車両。
- 請求項1ないし請求項13いずれか一項記載の半導体装置を備える昇降機。
- n型の第1の炭化珪素領域を有する炭化珪素層に酸素を注入する第1のイオン注入を行い、
前記炭化珪素層に、炭素を注入する第2のイオン注入を行い、
前記炭化珪素層の上に導電膜を形成し、
第1の熱処理を行う半導体装置の製造方法。 - 前記第1のイオン注入及び前記第2のイオン注入の後、前記導電膜を形成する前に、前記第1の熱処理よりも温度の高い第2の熱処理を、更に行う請求項18記載の半導体装置の製造方法。
- 前記第1のイオン注入及び前記第2のイオン注入の前に、前記炭化珪素層の上に酸化膜を形成し、
前記第1のイオン注入及び前記第2のイオン注入の後、前記導電膜を形成する前に、前記酸化膜を除去する請求項18又は請求項19記載の半導体装置の製造方法。 - 前記第1の熱処理の温度は300℃以上700℃以下である請求項18ないし請求項20いずれか一項記載の半導体装置の製造方法。
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