JP4111983B2 - プラズマ処理方法 - Google Patents
プラズマ処理方法 Download PDFInfo
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- JP4111983B2 JP4111983B2 JP2006531279A JP2006531279A JP4111983B2 JP 4111983 B2 JP4111983 B2 JP 4111983B2 JP 2006531279 A JP2006531279 A JP 2006531279A JP 2006531279 A JP2006531279 A JP 2006531279A JP 4111983 B2 JP4111983 B2 JP 4111983B2
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- 238000003672 processing method Methods 0.000 title claims description 7
- 239000007789 gas Substances 0.000 claims description 77
- 238000012545 processing Methods 0.000 claims description 27
- 238000010405 reoxidation reaction Methods 0.000 claims description 23
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 20
- 239000001301 oxygen Substances 0.000 claims description 20
- 229910052760 oxygen Inorganic materials 0.000 claims description 20
- 230000009467 reduction Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- 229910052594 sapphire Inorganic materials 0.000 claims description 3
- 239000010980 sapphire Substances 0.000 claims description 3
- 239000003989 dielectric material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 31
- 230000008569 process Effects 0.000 description 24
- 239000001257 hydrogen Substances 0.000 description 23
- 229910052739 hydrogen Inorganic materials 0.000 description 23
- 238000004380 ashing Methods 0.000 description 20
- 238000011282 treatment Methods 0.000 description 18
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 17
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 12
- 229910004298 SiO 2 Inorganic materials 0.000 description 8
- 230000009849 deactivation Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 238000000295 emission spectrum Methods 0.000 description 6
- 238000009832 plasma treatment Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001312 dry etching Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 238000001020 plasma etching Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000504 luminescence detection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32458—Vessel
- H01J37/32477—Vessel characterised by the means for protecting vessels or internal parts, e.g. coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—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
- 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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3065—Plasma etching; Reactive-ion etching
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Drying Of Semiconductors (AREA)
- Plasma Technology (AREA)
Description
1a…排気口
2…載置台
3…シャワーノズル
4…ガス導入口
5…ガス導入管
6…プラズマ発生室部材
6a…プラズマ発生室
7…ガス制御部
8,9…ボンベ
10…アプリケータ
11…マイクロ波供給管
12…マイクロ波発生器
13a…発光検知センサ
13b…発光スペクトルモニタ
14…マイクロ波マッチング装置
S…被処理物
本実施形態のプラズマ処理装置は、プロセスガスを励起させて生成したラジカルによって被処理物Sの表面を処理する装置であり、図1に示すように排気口1a,1bを介して内部を真空排気できるプロセス室1と、このプロセス室1の内部には被処理物Sを載置する載置台2とを備えている。
以上のような構成からなる本実施形態のプラズマ処理装置では、上記のような誘電体で形成されたプラズマ発生室部材6が水素を含むガスから生成される還元性プラズマで還元された場合に、ガス制御部7により水素を含んだガスに換えて酸素を含んだガスをプラズマ発生室6aに導入し、プラズマ発生室6aで酸素を含むガスを励起させ酸素プラズマを生成し、この酸素プラズマにより誘電体の再酸化による再生を行う。
なお、本発明は上記実施形態には限定されず、以下に例示するような他の実施形態にも適用が可能である。上記実施形態では、いわゆるケミカルドライエッチング(CDE)型のプラズマ処理装置について説明したが、本発明のプラズマ処理は、これに限定されることなく、水素を代表とする還元ガスのプラズマで処理を行う装置にも適用可能である。例えば、図7に示すようなドライエッチングのための、いわゆるダウンフロー型プラズマ処理装置、図8に示すような反応性イオンエッチング(RIE)装置、あるいは上記特許文献4に記載されているような装置にも適用可能である。
Claims (3)
- 少なくとも一部が誘電体で形成されたプラズマ発生室にガスを導入し、当該ガスを励起させてプラズマを生起し、前記ガスプラズマによって被処理対象物のプラズマ処理を行うプラズマ処理方法であって、
前記プラズマ発生室に対して、還元性ガスを供給する工程と、
前記還元性ガスを励起させることにより生起された還元性プラズマに接する部材が還元された場合には、前記還元性ガスに換えて再酸化処理ガスを前記プラズマ発生室に導入する工程とを含み、
前記還元性ガスを励起させることにより生起された還元性プラズマにより還元されたこと又は再酸化処理ガスを前記プラズマ発生室に導入することにより再酸化されたことを検出する工程と、
前記検出結果に基づいて、導入するガスを切換える工程とを含むことを特徴とするプラズマ処理方法。 - 前記再酸化ガスは、酸素を含むことを特徴とする請求項1記載のプラズマ処理方法。
- 前記誘電体は、石英、アルミナ、サファイア又は窒化アルミニウムのいずれかにより構成されることを特徴とする請求項1記載のプラズマ処理方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004254241 | 2004-09-01 | ||
JP2004254241 | 2004-09-01 | ||
PCT/JP2005/009172 WO2006025136A1 (ja) | 2004-09-01 | 2005-05-19 | プラズマ処理装置及びプラズマ処理方法 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008058727A Division JP4682218B2 (ja) | 2004-09-01 | 2008-03-07 | プラズマ処理装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPWO2006025136A1 JPWO2006025136A1 (ja) | 2008-05-08 |
JP4111983B2 true JP4111983B2 (ja) | 2008-07-02 |
Family
ID=35999800
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006531279A Active JP4111983B2 (ja) | 2004-09-01 | 2005-05-19 | プラズマ処理方法 |
JP2008058727A Active JP4682218B2 (ja) | 2004-09-01 | 2008-03-07 | プラズマ処理装置 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008058727A Active JP4682218B2 (ja) | 2004-09-01 | 2008-03-07 | プラズマ処理装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8088296B2 (ja) |
EP (1) | EP1796154A4 (ja) |
JP (2) | JP4111983B2 (ja) |
KR (1) | KR100959981B1 (ja) |
WO (1) | WO2006025136A1 (ja) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4816126B2 (ja) * | 2006-02-20 | 2011-11-16 | 大日本印刷株式会社 | 注出具付き包装袋 |
US9173967B1 (en) | 2007-05-11 | 2015-11-03 | SDCmaterials, Inc. | System for and method of processing soft tissue and skin with fluids using temperature and pressure changes |
US8507401B1 (en) | 2007-10-15 | 2013-08-13 | SDCmaterials, Inc. | Method and system for forming plug and play metal catalysts |
US8557727B2 (en) | 2009-12-15 | 2013-10-15 | SDCmaterials, Inc. | Method of forming a catalyst with inhibited mobility of nano-active material |
US8803025B2 (en) | 2009-12-15 | 2014-08-12 | SDCmaterials, Inc. | Non-plugging D.C. plasma gun |
US9149797B2 (en) | 2009-12-15 | 2015-10-06 | SDCmaterials, Inc. | Catalyst production method and system |
US9126191B2 (en) | 2009-12-15 | 2015-09-08 | SDCmaterials, Inc. | Advanced catalysts for automotive applications |
US8652992B2 (en) | 2009-12-15 | 2014-02-18 | SDCmaterials, Inc. | Pinning and affixing nano-active material |
US9039916B1 (en) | 2009-12-15 | 2015-05-26 | SDCmaterials, Inc. | In situ oxide removal, dispersal and drying for copper copper-oxide |
US8669202B2 (en) | 2011-02-23 | 2014-03-11 | SDCmaterials, Inc. | Wet chemical and plasma methods of forming stable PtPd catalysts |
AU2012299065B2 (en) | 2011-08-19 | 2015-06-04 | SDCmaterials, Inc. | Coated substrates for use in catalysis and catalytic converters and methods of coating substrates with washcoat compositions |
US9156025B2 (en) | 2012-11-21 | 2015-10-13 | SDCmaterials, Inc. | Three-way catalytic converter using nanoparticles |
US9511352B2 (en) | 2012-11-21 | 2016-12-06 | SDCmaterials, Inc. | Three-way catalytic converter using nanoparticles |
WO2014157321A1 (ja) * | 2013-03-28 | 2014-10-02 | 芝浦メカトロニクス株式会社 | 載置台及びプラズマ処理装置 |
CN105592921A (zh) | 2013-07-25 | 2016-05-18 | Sdc材料公司 | 用于催化转化器的洗涂层和经涂覆基底及其制造和使用方法 |
US9427732B2 (en) | 2013-10-22 | 2016-08-30 | SDCmaterials, Inc. | Catalyst design for heavy-duty diesel combustion engines |
CN105848756A (zh) | 2013-10-22 | 2016-08-10 | Sdc材料公司 | 用于贫NOx捕捉的组合物 |
US9687811B2 (en) | 2014-03-21 | 2017-06-27 | SDCmaterials, Inc. | Compositions for passive NOx adsorption (PNA) systems and methods of making and using same |
US9828672B2 (en) | 2015-03-26 | 2017-11-28 | Lam Research Corporation | Minimizing radical recombination using ALD silicon oxide surface coating with intermittent restoration plasma |
JP2021506126A (ja) | 2017-12-07 | 2021-02-18 | ラム リサーチ コーポレーションLam Research Corporation | チャンバ調整における耐酸化保護層 |
US10760158B2 (en) | 2017-12-15 | 2020-09-01 | Lam Research Corporation | Ex situ coating of chamber components for semiconductor processing |
US11145496B2 (en) * | 2018-05-29 | 2021-10-12 | Varian Semiconductor Equipment Associates, Inc. | System for using O-rings to apply holding forces |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05152333A (ja) | 1991-11-26 | 1993-06-18 | Toshiba Corp | 液晶表示装置の製造方法 |
JPH05330283A (ja) | 1992-06-02 | 1993-12-14 | Omron Corp | 情報カード、情報カード処理装置、情報記録再生方法 |
JP3198667B2 (ja) | 1992-10-22 | 2001-08-13 | ソニー株式会社 | レジストの除去方法 |
JP3231426B2 (ja) | 1992-10-28 | 2001-11-19 | 富士通株式会社 | 水素プラズマダウンフロー処理方法及び水素プラズマダウンフロー処理装置 |
JP3379302B2 (ja) * | 1995-10-13 | 2003-02-24 | 富士通株式会社 | プラズマ処理方法 |
JP3393399B2 (ja) * | 1996-09-24 | 2003-04-07 | アクセリス テクノロジーズ インコーポレーテッド | アッシング方法 |
US6939795B2 (en) | 2002-09-23 | 2005-09-06 | Texas Instruments Incorporated | Selective dry etching of tantalum and tantalum nitride |
US6360754B2 (en) | 1998-03-16 | 2002-03-26 | Vlsi Technology, Inc. | Method of protecting quartz hardware from etching during plasma-enhanced cleaning of a semiconductor processing chamber |
US6201276B1 (en) * | 1998-07-14 | 2001-03-13 | Micron Technology, Inc. | Method of fabricating semiconductor devices utilizing in situ passivation of dielectric thin films |
JP2001335937A (ja) | 2000-05-29 | 2001-12-07 | Mitsubishi Heavy Ind Ltd | 金属汚染低減方法及びプラズマ装置の再生方法 |
US6776851B1 (en) | 2001-07-11 | 2004-08-17 | Lam Research Corporation | In-situ cleaning of a polymer coated plasma processing chamber |
JP2003124311A (ja) | 2001-10-15 | 2003-04-25 | Hitachi Ltd | 半導体装置の製造方法および半導体装置 |
US6797645B2 (en) * | 2002-04-09 | 2004-09-28 | Kwangju Institute Of Science And Technology | Method of fabricating gate dielectric for use in semiconductor device having nitridation by ion implantation |
JP2004111731A (ja) | 2002-09-19 | 2004-04-08 | Toshiba Corp | プラズマ処理装置のクリーニング方法 |
JP3643580B2 (ja) * | 2002-11-20 | 2005-04-27 | 株式会社東芝 | プラズマ処理装置及び半導体製造装置 |
JP4620964B2 (ja) | 2004-04-20 | 2011-01-26 | パナソニック株式会社 | 金属膜のパターン形成方法 |
-
2005
- 2005-05-19 KR KR1020077007277A patent/KR100959981B1/ko active IP Right Grant
- 2005-05-19 US US11/574,570 patent/US8088296B2/en not_active Expired - Fee Related
- 2005-05-19 JP JP2006531279A patent/JP4111983B2/ja active Active
- 2005-05-19 WO PCT/JP2005/009172 patent/WO2006025136A1/ja active Application Filing
- 2005-05-19 EP EP05741627A patent/EP1796154A4/en not_active Withdrawn
-
2008
- 2008-03-07 JP JP2008058727A patent/JP4682218B2/ja active Active
Also Published As
Publication number | Publication date |
---|---|
JP4682218B2 (ja) | 2011-05-11 |
EP1796154A1 (en) | 2007-06-13 |
US8088296B2 (en) | 2012-01-03 |
KR100959981B1 (ko) | 2010-05-27 |
JPWO2006025136A1 (ja) | 2008-05-08 |
EP1796154A4 (en) | 2008-10-22 |
JP2008182259A (ja) | 2008-08-07 |
US20080283498A1 (en) | 2008-11-20 |
WO2006025136A1 (ja) | 2006-03-09 |
KR20070060102A (ko) | 2007-06-12 |
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