JP6960351B2 - 処理方法 - Google Patents
処理方法 Download PDFInfo
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- JP6960351B2 JP6960351B2 JP2018026998A JP2018026998A JP6960351B2 JP 6960351 B2 JP6960351 B2 JP 6960351B2 JP 2018026998 A JP2018026998 A JP 2018026998A JP 2018026998 A JP2018026998 A JP 2018026998A JP 6960351 B2 JP6960351 B2 JP 6960351B2
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- region
- convex portion
- etching
- nitrided
- oxide film
- Prior art date
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- 238000003672 processing method Methods 0.000 title claims description 11
- 239000007789 gas Substances 0.000 claims description 110
- 238000005530 etching Methods 0.000 claims description 54
- 238000000034 method Methods 0.000 claims description 52
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 48
- 238000012545 processing Methods 0.000 claims description 46
- 238000005121 nitriding Methods 0.000 claims description 45
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 45
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 17
- 239000001301 oxygen Substances 0.000 claims description 17
- 229910052760 oxygen Inorganic materials 0.000 claims description 17
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 16
- 239000001257 hydrogen Substances 0.000 claims description 14
- 229910052739 hydrogen Inorganic materials 0.000 claims description 14
- 239000010703 silicon Substances 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 11
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 9
- 229910052731 fluorine Inorganic materials 0.000 claims description 9
- 239000011737 fluorine Substances 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000013067 intermediate product Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000000231 atomic layer deposition Methods 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 description 26
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- 239000004020 conductor Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
- 230000005484 gravity Effects 0.000 description 7
- 239000003507 refrigerant Substances 0.000 description 7
- 238000001020 plasma etching Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000010494 dissociation reaction Methods 0.000 description 2
- 230000005593 dissociations Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000004767 nitrides Chemical group 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241001108918 Asclepias nivea Species 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- -1 fluorine ions Chemical class 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 150000002835 noble gases Chemical class 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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- 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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
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- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
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Description
Claims (7)
- 被加工物の処理方法であって、
前記被加工物は、
下地領域と、
シリコンから形成されており、前記下地領域から突き出るように延在する第1の凸部及び第2の凸部であり、該下地領域上で一方向に配列された該第1の凸部及び該第2の凸部と、
シリコン及び窒素を含み、前記第1の凸部の頂部上に設けられた第1の窒化領域と、
シリコン及び窒素を含み、前記第2の凸部の頂部上に設けられた第2の窒化領域と、
炭素を含み、前記第1の凸部、前記第2の凸部、前記第1の窒化領域、及び前記第2の窒化領域を覆うように設けられた有機領域と、
前記第1の凸部及び前記第1の窒化領域上で延在する前記有機領域の部分領域を露出させるように該有機領域上に設けられたマスクと、
を有し、
該処理方法は、
前記有機領域の前記部分領域を除去して前記第1の窒化領域を露出させるよう、前記有機領域をエッチングする工程と、
前記有機領域をエッチングする前記工程によって前記被加工物から作成された中間生産物の表面上にコンフォーマルにシリコン酸化膜を形成する工程と、
前記第1の窒化領域の上面を露出させるよう前記シリコン酸化膜をエッチングする工程と、
前記シリコン酸化膜及び前記第1の凸部に対して選択的に且つ等方的に前記第1の窒化領域をエッチングする工程と、
を含む処理方法。 - 前記シリコン酸化膜は原子層堆積法により形成される請求項1に記載の処理方法。
- 前記第1の窒化領域をエッチングする前記工程において、
水素含有ガスのプラズマにより、前記第1の窒化領域の表面を含む前記第1の窒化領域の少なくとも一部を改質する工程であり、該第1の窒化領域の該少なくとも一部から改質領域が形成される、該工程と、
フッ素含有ガスのプラズマにより、前記改質領域をエッチングする工程と、
を含むシーケンスが1回以上実行される、請求項1又は2に記載の処理方法。 - 前記シーケンスは、複数回実行され、
少なくとも前記第1の凸部が露出される時点を含む期間において実行されるシーケンスは、酸素含有ガスのプラズマにより、前記第1の凸部の表面を含む該第1の凸部の一部を酸化させる工程を含む、
請求項3に記載の処理方法。 - 前記第1の窒化領域の少なくとも一部を改質する前記工程が実行される期間と第1の凸部の一部を酸化させる前記工程が実行される期間は、互いに異なる、請求項4に記載の処理方法。
- 前記有機領域をエッチングする前記工程では、前記第1の凸部の周囲の前記有機領域の上面の高さ方向の位置が、前記第1の窒化領域と前記第1の凸部との間の境界の高さ方向の位置と同一であるか、又は、該境界の該高さ方向の該位置よりも低くなるように、前記有機領域がエッチングされる、請求項1〜5の何れか一項に記載の処理方法。
- 前記有機領域をエッチングする前記工程、シリコン酸化膜を形成する前記工程、前記シリコン酸化膜をエッチングする前記工程、及び前記第1の窒化領域をエッチングする前記工程が、単一のプラズマ処理装置の単一のチャンバの中に前記被加工物が収容された状態で実行される、請求項1〜6の何れか一項に記載の処理方法。
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US16/274,273 US10593783B2 (en) | 2018-02-19 | 2019-02-13 | Processing method |
KR1020190016821A KR20190100041A (ko) | 2018-02-19 | 2019-02-13 | 처리 방법 |
TW108104908A TWI818953B (zh) | 2018-02-19 | 2019-02-14 | 被加工物之處理方法 |
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US7977249B1 (en) * | 2007-03-07 | 2011-07-12 | Novellus Systems, Inc. | Methods for removing silicon nitride and other materials during fabrication of contacts |
US8569125B2 (en) * | 2011-11-30 | 2013-10-29 | International Business Machines Corporation | FinFET with improved gate planarity |
JP2015037091A (ja) | 2013-08-12 | 2015-02-23 | 東京エレクトロン株式会社 | エッチング方法 |
US8980758B1 (en) * | 2013-09-17 | 2015-03-17 | Applied Materials, Inc. | Methods for etching an etching stop layer utilizing a cyclical etching process |
JP6243722B2 (ja) * | 2013-12-10 | 2017-12-06 | 東京エレクトロン株式会社 | エッチング処理方法 |
JP6496320B2 (ja) * | 2013-12-30 | 2019-04-03 | キャノン・ナノテクノロジーズ・インコーポレーテッド | サブ20nmの図案の均一なインプリントパターン転写方法 |
JP6059165B2 (ja) * | 2014-02-19 | 2017-01-11 | 東京エレクトロン株式会社 | エッチング方法、及びプラズマ処理装置 |
US9196499B2 (en) * | 2014-03-26 | 2015-11-24 | Globalfoundries Inc. | Method of forming semiconductor fins |
US9780191B2 (en) * | 2014-07-18 | 2017-10-03 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Method of forming spacers for a gate of a transistor |
JP6494424B2 (ja) * | 2015-05-29 | 2019-04-03 | 東京エレクトロン株式会社 | エッチング方法 |
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US9806161B1 (en) * | 2016-04-07 | 2017-10-31 | Globalfoundries Inc. | Integrated circuit structure having thin gate dielectric device and thick gate dielectric device |
US10026827B2 (en) * | 2016-04-10 | 2018-07-17 | United Microelectronics Corp. | Method for fabricating semiconductor device |
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US10008414B2 (en) * | 2016-06-28 | 2018-06-26 | Taiwan Semiconductor Manufacturing Co., Ltd. | System and method for widening Fin widths for small pitch FinFET devices |
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JP2019145608A (ja) | 2019-08-29 |
US10593783B2 (en) | 2020-03-17 |
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