JP4509864B2 - プラズマ処理方法およびプラズマ処理装置 - Google Patents
プラズマ処理方法およびプラズマ処理装置 Download PDFInfo
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- 238000003672 processing method Methods 0.000 title claims description 14
- 238000000034 method Methods 0.000 claims description 53
- 239000007789 gas Substances 0.000 claims description 50
- 230000008569 process Effects 0.000 claims description 41
- 238000005121 nitriding Methods 0.000 claims description 37
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 30
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 30
- 229910052710 silicon Inorganic materials 0.000 claims description 21
- 239000010703 silicon Substances 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 16
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 6
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 6
- 239000010408 film Substances 0.000 description 101
- 150000004767 nitrides Chemical class 0.000 description 25
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 17
- 150000002500 ions Chemical class 0.000 description 15
- 230000005855 radiation Effects 0.000 description 11
- 150000003254 radicals Chemical class 0.000 description 10
- 238000005755 formation reaction Methods 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000009832 plasma treatment Methods 0.000 description 4
- 230000000644 propagated effect Effects 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 3
- 229920005591 polysilicon Polymers 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 229910007991 Si-N Inorganic materials 0.000 description 2
- 229910006294 Si—N Inorganic materials 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
- 239000000919 ceramic Substances 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- -1 nitrogen ions Chemical class 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910017083 AlN Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910004129 HfSiO Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910052774 Proactinium Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910006501 ZrSiO Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
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- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 150000002831 nitrogen free-radicals Chemical class 0.000 description 1
- 238000009931 pascalization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 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
- 239000010409 thin film Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Description
シリコン窒化膜を形成する方法としては、前もって成膜しておいたSiO2などのシリコン酸化膜を後から窒化処理する方法が主流であったが、プラズマ処理によって単結晶シリコンを直接窒化処理する技術として、マイクロ波プラズマCVD装置の反応室内にNH3ガスを導入し、処理圧力100Torr(13332Pa)、処理温度1300℃でシリコン窒化膜を形成する方法、あるいは、前記反応室内にN2ガスを導入し、処理圧力50mTorr(6.7Pa)、処理温度1150℃でシリコン窒化膜を形成する方法が提案されている(例えば、特許文献1)。
前記処理室内の圧力を66.65Pa超1333Pa以下の範囲とし、前記窒素含有プラズマ中のラジカル成分による窒化反応が支配的となるようにして、該プラズマにより前記シリコンを直接窒化処理し、シリコン窒化膜を形成する第1のステップと、
前記第1のステップの後、前記処理室内の圧力を1.33Pa以上66.65Pa以下の範囲とし、前記窒素含有プラズマ中のイオン成分による窒化反応が支配的となるようにして、該プラズマにより前記シリコンの前記第1のステップにより形成されたシリコン窒化膜よりも深い部分を直接窒化処理し、シリコン窒化膜を形成する第2のステップと、
を含むことを特徴とする、プラズマ処理方法が提供される。
前記プラズマにより、被処理体を処理するための真空排気可能な処理容器と、
前記処理容器内で前記被処理体を載置する基板支持台と、
上記第1の観点のプラズマ処理方法が行なわれるように制御する制御部と、
を備えたことを特徴とする、プラズマ処理装置が提供される。
<低圧処理>
処理ガスとしてAr/N2を流量1000/40mL/min(sccm)で用い、圧力は12Pa(90mTorr)とし、ウエハ温度800℃、プラズマへの供給パワーは1.5kWにより行なった。
<高圧処理>
処理ガスとしてAr/N2を流量1000/200mL/min(sccm)で用い、圧力は200Pa(1500mTorr)とし、ウエハ温度800℃、プラズマへの供給パワーは1.5kWにより行なった。
<第1ステップ>
処理ガスとしてAr/N2を流量1000/200mL/min(sccm)で用い、圧力は200Pa(1500mTorr)とし、ウエハ温度800℃、プラズマへの供給パワーは1.5kWにより行なった。
<第2ステップ>
処理ガスとしてAr/N2を流量1000/40mL/min(sccm)で用い、圧力を12Pa(90mTorr)とした以外は、第1ステップと同様に行なった。
たとえば、図1では、RLSA方式のプラズマ処理装置100を例に挙げたが、例えばリモートプラズマ方式、ICP方式、ECR方式等のプラズマ処理装置であってもよい。
2;サセプタ
3;支持部材
5;ヒータ
15;ガス導入部材
16;ガス供給系
17;Arガス供給源
18;N2ガス供給源
23;排気管
24;排気装置
25;搬入出口
26;ゲートバルブ
27;アッパープレート
27a;支持部
28;マイクロ波透過板
29;シール部材
31;平面アンテナ部材
32;マイクロ波放射孔
37;導波管
37a;同軸導波管
37b;矩形導波管
39;マイクロ波発生装置
40;モード変換器
50;プロセスコントローラ
100;プラズマ処理装置
101;Si基板
102;素子分離領域
103;ゲート絶縁膜
104;ポリシリコン層(ゲート電極)
105;サイドウォール
200;トランジスタ
W…ウエハ(基板)
Claims (6)
- プラズマ処理装置の処理室内に窒素ガスおよび希ガスを供給して窒素含有プラズマを生成し、被処理体表面のシリコンに対して該窒素含有プラズマを作用させてシリコンを直接窒化処理し、シリコン窒化膜を形成するプラズマ処理方法であって、
前記処理室内の圧力を66.65Pa超1333Pa以下の範囲とし、前記窒素含有プラズマ中のラジカル成分による窒化反応が支配的となるようにして、該プラズマにより前記シリコンを直接窒化処理し、シリコン窒化膜を形成する第1のステップと、
前記第1のステップの後、前記処理室内の圧力を1.33Pa以上66.65Pa以下の範囲とし、前記窒素含有プラズマ中のイオン成分による窒化反応が支配的となるようにして、該プラズマにより前記シリコンの前記第1のステップにより形成されたシリコン窒化膜よりも深い部分を直接窒化処理し、シリコン窒化膜を形成する第2のステップと、
を含むことを特徴とする、プラズマ処理方法。 - 前記窒素含有プラズマは、複数のスロットを有する平面アンテナにて前記処理室内にマイクロ波を導入することにより形成されることを特徴とする、請求項1に記載のプラズマ処理方法。
- 前記第1のステップによる処理を、前記シリコン窒化膜が1.5nmの膜厚に成長するまで行なった後、前記第2のステップによる処理を行なうことを特徴とする、請求項1または請求項2に記載のプラズマ処理方法。
- 前記第1のステップでは、前記処理室内の圧力を133.3〜1333Paとし、前記第2のステップでは、前記処理室内の圧力を1.33〜39.99Paとすることを特徴とする請求項1から請求項3のいずれか1項に記載のプラズマ処理方法。
- 前記第1のステップでは、窒素ガスの流量を50〜2000mL/min、希ガスの流量を250〜500mL/minとし、前記第2のステップでは、窒素ガスの流量を10〜1000mL/min、希ガスの流量を250〜500mL/minとし、前記第1のステップおよび前記第2のステップの際の処理温度を400〜800℃とすることを特徴とする請求項1から請求項4のいずれか1項に記載のプラズマ処理方法。
- プラズマを発生させるプラズマ供給源と、
前記プラズマにより、被処理体を処理するための真空排気可能な処理容器と、
前記処理容器内で前記被処理体を載置する基板支持台と、
請求項1から請求項5のいずれか1項に記載されたプラズマ処理方法が行なわれるように制御する制御部と、
を備えたことを特徴とする、プラズマ処理装置。
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JP2005157841A JP4509864B2 (ja) | 2005-05-30 | 2005-05-30 | プラズマ処理方法およびプラズマ処理装置 |
TW095119020A TWI407507B (zh) | 2005-05-30 | 2006-05-29 | Plasma processing method |
KR1020060047912A KR100874517B1 (ko) | 2005-05-30 | 2006-05-29 | 플라즈마 처리 방법 |
CN200610085008A CN100576464C (zh) | 2005-05-30 | 2006-05-30 | 等离子体处理方法 |
US11/442,272 US20060269694A1 (en) | 2005-05-30 | 2006-05-30 | Plasma processing method |
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JP (1) | JP4509864B2 (ja) |
KR (1) | KR100874517B1 (ja) |
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TW200511430A (en) * | 2003-05-29 | 2005-03-16 | Tokyo Electron Ltd | Plasma processing apparatus and plasma processing method |
JP4294696B2 (ja) * | 2007-02-02 | 2009-07-15 | 東京エレクトロン株式会社 | 半導体装置の製造方法および製造装置、ならびに記憶媒体 |
JP5138261B2 (ja) * | 2007-03-30 | 2013-02-06 | 東京エレクトロン株式会社 | シリコン酸化膜の形成方法、プラズマ処理装置および記憶媒体 |
JP5459899B2 (ja) * | 2007-06-01 | 2014-04-02 | 株式会社半導体エネルギー研究所 | 半導体装置の作製方法 |
JP5223364B2 (ja) * | 2008-02-07 | 2013-06-26 | 東京エレクトロン株式会社 | プラズマエッチング方法及び記憶媒体 |
JP2009246211A (ja) * | 2008-03-31 | 2009-10-22 | Tokyo Electron Ltd | Mos型半導体メモリ装置の製造方法、コンピュータ読み取り可能な記憶媒体およびプラズマcvd装置 |
KR101489326B1 (ko) * | 2008-09-09 | 2015-02-11 | 삼성전자주식회사 | 기판의 처리 방법 |
JP2011097029A (ja) * | 2009-09-30 | 2011-05-12 | Tokyo Electron Ltd | 半導体装置の製造方法 |
US8748259B2 (en) * | 2010-03-02 | 2014-06-10 | Applied Materials, Inc. | Method and apparatus for single step selective nitridation |
JP5567392B2 (ja) * | 2010-05-25 | 2014-08-06 | 東京エレクトロン株式会社 | プラズマ処理装置 |
TWI549163B (zh) * | 2011-09-20 | 2016-09-11 | 應用材料股份有限公司 | 減少摻質擴散之表面穩定化製程 |
WO2015175163A1 (en) | 2014-05-16 | 2015-11-19 | Applied Materials, Inc. | Showerhead design |
CN110752147B (zh) * | 2019-10-30 | 2021-11-26 | 上海华力微电子有限公司 | 基底的氮化处理方法 |
CN111850457B (zh) * | 2020-07-29 | 2022-04-22 | 扬州大学 | 一种可控表面渗氮装置及其使用方法 |
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JPH01207930A (ja) * | 1988-02-16 | 1989-08-21 | Oki Electric Ind Co Ltd | 表面改質法 |
JP2004165377A (ja) * | 2002-11-12 | 2004-06-10 | Canon Inc | 表面改質方法 |
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JP3191745B2 (ja) * | 1997-04-23 | 2001-07-23 | 日本電気株式会社 | 薄膜トランジスタ素子及びその製造方法 |
JP5068402B2 (ja) * | 2000-12-28 | 2012-11-07 | 公益財団法人国際科学振興財団 | 誘電体膜およびその形成方法、半導体装置、不揮発性半導体メモリ装置、および半導体装置の製造方法 |
JP4421150B2 (ja) | 2001-09-04 | 2010-02-24 | パナソニック株式会社 | 絶縁膜の形成方法 |
JP2004014875A (ja) * | 2002-06-07 | 2004-01-15 | Fujitsu Ltd | 半導体装置及びその製造方法 |
DE10255936B4 (de) * | 2002-11-29 | 2005-12-29 | Advanced Micro Devices, Inc., Sunnyvale | Verfahren zur Herstellung einer Isolationsschicht und Verfahren zum Steuern einer Stickstoffkonzentration während der Herstellung der Isolationsschicht |
JP2004266075A (ja) * | 2003-02-28 | 2004-09-24 | Tokyo Electron Ltd | 基板処理方法 |
JP2005044934A (ja) | 2003-07-25 | 2005-02-17 | Seiko Epson Corp | 半導体製造装置、半導体装置及びその製造方法 |
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- 2006-05-29 KR KR1020060047912A patent/KR100874517B1/ko not_active IP Right Cessation
- 2006-05-30 CN CN200610085008A patent/CN100576464C/zh not_active Expired - Fee Related
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JPH01207930A (ja) * | 1988-02-16 | 1989-08-21 | Oki Electric Ind Co Ltd | 表面改質法 |
JP2004165377A (ja) * | 2002-11-12 | 2004-06-10 | Canon Inc | 表面改質方法 |
Also Published As
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KR100874517B1 (ko) | 2008-12-16 |
KR20060124591A (ko) | 2006-12-05 |
CN100576464C (zh) | 2009-12-30 |
TW200710990A (en) | 2007-03-16 |
US20060269694A1 (en) | 2006-11-30 |
JP2006332555A (ja) | 2006-12-07 |
TWI407507B (zh) | 2013-09-01 |
CN1873927A (zh) | 2006-12-06 |
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