JP2005510087A - ゲート電荷が低いトレンチ金属酸化膜半導体電界効果トランジスタ - Google Patents
ゲート電荷が低いトレンチ金属酸化膜半導体電界効果トランジスタ Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 40
- 230000005669 field effect Effects 0.000 title claims abstract description 38
- 229910044991 metal oxide Inorganic materials 0.000 title claims abstract description 37
- 150000004706 metal oxides Chemical class 0.000 title claims abstract description 37
- 210000000746 body region Anatomy 0.000 claims abstract description 42
- 239000000758 substrate Substances 0.000 claims abstract description 41
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 32
- 239000010703 silicon Substances 0.000 claims abstract description 32
- 230000003647 oxidation Effects 0.000 claims abstract description 17
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims description 50
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 50
- 229920005591 polysilicon Polymers 0.000 claims description 41
- 238000005530 etching Methods 0.000 claims description 23
- 229920002120 photoresistant polymer Polymers 0.000 claims description 13
- 239000003870 refractory metal Substances 0.000 claims description 12
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 11
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 7
- 229910052721 tungsten Inorganic materials 0.000 claims description 7
- 239000010937 tungsten Substances 0.000 claims description 7
- 229910001080 W alloy Inorganic materials 0.000 claims description 5
- 229910021332 silicide Inorganic materials 0.000 claims description 5
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 5
- MAKDTFFYCIMFQP-UHFFFAOYSA-N titanium tungsten Chemical compound [Ti].[W] MAKDTFFYCIMFQP-UHFFFAOYSA-N 0.000 claims description 5
- 229910021341 titanium silicide Inorganic materials 0.000 claims description 4
- 238000000151 deposition Methods 0.000 claims description 3
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 239000005380 borophosphosilicate glass Substances 0.000 description 8
- 239000012535 impurity Substances 0.000 description 8
- 238000001020 plasma etching Methods 0.000 description 8
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 6
- 239000004020 conductor Substances 0.000 description 6
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 229910008484 TiSi Inorganic materials 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 238000002513 implantation Methods 0.000 description 3
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-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
- 239000007943 implant Substances 0.000 description 2
- WNUPENMBHHEARK-UHFFFAOYSA-N silicon tungsten Chemical compound [Si].[W] WNUPENMBHHEARK-UHFFFAOYSA-N 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000005557 antagonist Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- FAIAAWCVCHQXDN-UHFFFAOYSA-N phosphorus trichloride Chemical compound ClP(Cl)Cl FAIAAWCVCHQXDN-UHFFFAOYSA-N 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 238000004151 rapid thermal annealing Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
- 238000009279 wet oxidation reaction Methods 0.000 description 1
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Abstract
Description
導電領域は、好ましくは、多結晶シリコンから形成する。幾つかの実施例においては、導電領域は、多結晶シリコン部分と、高融点金属又は高融点金属合金(例えば、タングステン部分又はチタン−タングステン合金部分)から選択された部分とを含む。また、他の実施例においては、導電領域は、多結晶シリコン部分と、高融点金属シリサイド部分(例えば、ケイ化チタン部分)とを含む。
Claims (27)
- 第1の伝導性を有するシリコン製の基板と、
上記基板上に形成され、上記第1の伝導性を有し、上記基板より低い多数キャリア濃度を有するシリコン製のエピタキシャル層と、
上記エピタキシャル層の上部内に形成された、第2の伝導性を有するボディ領域と、
上記エピタキシャル層の表面から、上記ボディ領域を貫通して該エピタキシャル層内に延び、トレンチ側壁及びトレンチ底部を有するトレンチと、
上記トレンチの内部に形成され、少なくとも上記トレンチ底部を覆う下側部分と、上記トレンチ側壁の少なくとも上部領域を覆う上側部分とを有する酸化領域と、
上記トレンチ内において、上記酸化領域に隣接する導電領域と、
上記ボディ領域の上部であって上記トレンチに隣接する部分に形成された、上記第1の伝導性を有するソース領域とを備え、
上記酸化領域の下側部分は、該酸化領域の上側部分より厚く、上記トレンチ側壁に沿った上記導電領域に隣接する上記酸化領域に段差が形成されていることを特徴とするトレンチ金属酸化膜半導体電界効果トランジスタデバイス。 - 上記酸化領域の下側部分は、上記トレンチに接する熱成長部分と、上記導電領域に接する堆積酸化物部分とから構成され、上記酸化領域の上側部分は、熱成長酸化層であることを特徴とする請求項1記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
- 上記堆積酸化物部分は、高密度化されたテトラエチルオルソシリケート(TEOS)であることを特徴とする請求項2記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
- 上記熱成長酸化層の厚さは、500〜2000Åの範囲内であることを特徴とする請求項2記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
- 上記堆積酸化物部分の厚さは、500〜2000Åの範囲内であることを特徴とする請求項2記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
- 上記酸化領域の上側部分の厚さは、100〜1000Åの範囲内であることを特徴とする請求項2記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
- 上記酸化領域の下側部分は、厚い熱成長酸化領域であり、上記酸化領域の上側部分は、薄い熱成長酸化領域であることを特徴とする請求項1記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
- 上記厚い熱成長酸化領域の厚さは、500〜2000Åの範囲内であることを特徴とする請求項7記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
- 上記薄い熱成長酸化領域の厚さは、100〜1000Åの範囲内であることを特徴とする請求項7記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
- 上記導電領域は、多結晶シリコンを含むことを特徴とする請求項1記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
- 上記導電領域は、多結晶シリコン部分と、高融点金属又は高融点金属合金から選択された部分とを含むことを特徴とする請求項1記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
- 上記導電領域は、多結晶シリコン部分と、タングステン部分とを含むことを特徴とする請求項11記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
- 上記導電領域は、多結晶シリコン部分と、チタン−タングステン合金部分とを含むことを特徴とする請求項11記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
- 上記導電領域は、多結晶シリコン部分と、高融点金属シリサイド部分とを含むことを特徴とする請求項1記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
- 上記導電領域は、多結晶シリコン部分と、ケイ化チタン部分とを含むことを特徴とする請求項14記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
- 上記第1の伝導性は、n型伝導性であり、上記第2の伝導性は、p型伝導性であることを特徴とする請求項1記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
- 第1の伝導性を有するシリコン製の基板を準備する工程と、
上記基板上に、上記第1の伝導性を有し、上記基板より低い多数キャリア濃度を有するシリコン製のエピタキシャル層を成長させる工程と、
上記エピタキシャル層の上部内に、第2の伝導性を有するボディ領域を形成する工程と、
上記エピタキシャル層の表面から、上記ボディ領域を貫通して該エピタキシャル層内に延び、トレンチ側壁及びトレンチ底部を有するトレンチをエッチングする工程と、
上記トレンチの内部に、少なくとも上記トレンチ底部を覆う下側部分と、上記トレンチ側壁の少なくとも上部領域を覆う上側部分とを有する酸化領域を形成する工程と、
上記トレンチ内において、上記酸化領域に隣接する導電領域を堆積させる工程と、
上記ボディ領域の上部であって上記トレンチに隣接する部分に、上記第1の伝導性を有するソース領域を形成する工程とを有し、
上記酸化領域の下側部分は、該酸化領域の上側部分より厚く、上記トレンチ側壁に沿った上記導電領域に隣接する上記酸化領域に段差が形成されることを特徴とするレンチ金属酸化膜半導体電界効果トランジスタデバイスの製造方法。 - 上記トレンチの内部に酸化領域を形成する工程は、
上記トレンチ内に熱酸化層を形成する工程と、
上記熱酸化層上に堆積酸化層を形成する工程と、
上記トレンチの底部の上記堆積酸化層上に、エッチングレジスト層を形成する工程と、
上記堆積酸化層の上記エッチングレジスト層によって覆われていない部分をエッチングする工程とを有することを特徴とする請求項17記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイスの製造方法。 - 上記エッチングレジスト層は、フォトレジスト層であることを特徴とする請求項18記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイスの製造方法。
- 上記エッチングレジスト層は、ポリシリコン層であることを特徴とする請求項18記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイスの製造方法。
- 上記熱酸化は、上記堆積酸化層のエッチングの後に行われることを特徴とする請求項18記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイスの製造方法。
- 上記トレンチの内側に酸化領域を形成する工程は、
上記トレンチ内に厚い熱酸化層を形成する工程と、
上記トレンチ底部内の上記厚い酸化層上にエッチングレジスト層を形成する工程と、
上記厚い酸化層の上記エッチングレジスト層によって覆われていない部分をエッチングする工程とを有することを特徴とする請求項17記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイスの製造方法。 - 上記エッチングレジスト層は、フォトレジスト層であることを特徴とする請求項22記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイスの製造方法。
- 上記エッチングレジスト層は、ポリシリコン層であることを特徴とする請求項22記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイスの製造方法。
- 上記熱酸化は、上記厚い酸化層のエッチングの後に行われることを特徴とする請求項22記載のトレンチ金属酸化膜半導体電界効果トランジスタデバイスの製造方法。
- 第1の伝導性を有するシリコン製の基板と、
上記基板上に形成され、上記第1の伝導性を有し、上記基板より低い多数キャリア濃度を有するシリコン製のエピタキシャル層と、
上記エピタキシャル層の上部内に形成された、第2の伝導性を有するボディ領域と、
上記エピタキシャル層の表面から、上記ボディ領域を貫通して該エピタキシャル層内に延び、トレンチ側壁及びトレンチ底部を有するトレンチと、
上記トレンチの内部に形成され、上記トレンチ側壁の少なくとも上部領域を覆う上側部分と、少なくとも上記トレンチ底部を覆い、上記上側部分より実質的に厚い下側部分とを有する酸化領域と、
上記トレンチ内において、上記酸化領域に隣接する導電領域と、
上記ボディ領域の上部であって上記トレンチに隣接する部分に形成された、上記第1の伝導性を有するソース領域とを備え、
上記シリコンとの間に界面を形成する上記酸化領域の部分は、熱成長により形成されていることを特徴とするトレンチ金属酸化膜半導体電界効果トランジスタデバイス。 - 第1の伝導性を有するシリコン製の基板と、
上記基板上に形成され、上記第1の伝導性を有し、上記基板より低い多数キャリア濃度を有するシリコン製のエピタキシャル層と、
上記エピタキシャル層の上部内に形成された、第2の伝導性を有するボディ領域と、
上記エピタキシャル層の表面から、上記ボディ領域を貫通して該エピタキシャル層内に延び、トレンチ側壁及びトレンチ底部を有するトレンチと、
上記トレンチの内部に形成され、上記トレンチ側壁の上部領域を覆う上側部分と、該トレンチ側壁の下部領域及び上記トレンチ底部を覆い、上記上側部分より実質的に厚いU字状の下側部分とを有する酸化領域と、
上記トレンチ内において、上記酸化領域に隣接する導電領域と、
上記ボディ領域の上部であって上記トレンチに隣接する部分に形成された、上記第1の伝導性を有するソース領域とを備えるトレンチ金属酸化膜半導体電界効果トランジスタデバイス。
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- 2002-11-13 CN CNB028226496A patent/CN100392866C/zh not_active Expired - Fee Related
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JP4500598B2 (ja) * | 2004-06-24 | 2010-07-14 | トヨタ自動車株式会社 | 絶縁ゲート型半導体装置の製造方法 |
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JP2008270606A (ja) * | 2007-04-23 | 2008-11-06 | New Japan Radio Co Ltd | Mosfet型半導体装置及びその製造方法 |
US8242557B2 (en) | 2007-09-28 | 2012-08-14 | Semiconductor Components Industries, Llc | Trench gate type transistor |
US8076720B2 (en) | 2007-09-28 | 2011-12-13 | Semiconductor Components Industries, Llc | Trench gate type transistor |
US8748977B2 (en) | 2011-03-23 | 2014-06-10 | Panasonic Corporation | Semiconductor device and method for producing same |
JPWO2012127821A1 (ja) * | 2011-03-23 | 2014-07-24 | パナソニック株式会社 | 半導体装置およびその製造方法 |
JP2012216675A (ja) * | 2011-03-31 | 2012-11-08 | Toyota Motor Corp | 半導体装置及びその製造方法 |
JP2012060151A (ja) * | 2011-11-15 | 2012-03-22 | On Semiconductor Trading Ltd | トレンチゲート型トランジスタの製造方法 |
WO2014171211A1 (ja) * | 2013-04-16 | 2014-10-23 | 住友電気工業株式会社 | 炭化珪素半導体装置の製造方法 |
WO2014171210A1 (ja) * | 2013-04-16 | 2014-10-23 | 住友電気工業株式会社 | 炭化珪素半導体装置の製造方法および炭化珪素半導体装置 |
JP2014207403A (ja) * | 2013-04-16 | 2014-10-30 | 住友電気工業株式会社 | 炭化珪素半導体装置の製造方法 |
JP2014209505A (ja) * | 2013-04-16 | 2014-11-06 | 住友電気工業株式会社 | 炭化珪素半導体装置の製造方法および炭化珪素半導体装置 |
US9627487B2 (en) | 2013-04-16 | 2017-04-18 | Sumitomo Electric Industries, Ltd. | Method for manufacturing silicon carbide semiconductor device and silicon carbide semiconductor device |
US9793365B2 (en) | 2013-04-16 | 2017-10-17 | Sumitomo Electric Industries, Ltd. | Method for manufacturing silicon carbide semiconductor device having trench |
JP2019212902A (ja) * | 2018-05-15 | 2019-12-12 | インフィネオン テクノロジーズ アーゲーInfineon Technologies Ag | 炭化ケイ素体を有する半導体デバイスおよび製造方法 |
US11881512B2 (en) | 2018-05-15 | 2024-01-23 | Infineon Technologies Ag | Method of manufacturing semiconductor device with silicon carbide body |
JP7493309B2 (ja) | 2018-05-15 | 2024-05-31 | インフィネオン テクノロジーズ アーゲー | 炭化ケイ素体を有する半導体デバイスおよび製造方法 |
Also Published As
Publication number | Publication date |
---|---|
CN1586012A (zh) | 2005-02-23 |
US20040150038A1 (en) | 2004-08-05 |
WO2003044865A1 (en) | 2003-05-30 |
US6674124B2 (en) | 2004-01-06 |
US6979621B2 (en) | 2005-12-27 |
US20030089946A1 (en) | 2003-05-15 |
JP5081367B2 (ja) | 2012-11-28 |
CN100392866C (zh) | 2008-06-04 |
AU2002350184A1 (en) | 2003-06-10 |
KR100936966B1 (ko) | 2010-01-14 |
TW200300295A (en) | 2003-05-16 |
EP1451877A4 (en) | 2009-06-03 |
KR20040053318A (ko) | 2004-06-23 |
EP1451877A1 (en) | 2004-09-01 |
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