CN1307517A - 废乙二醇基浆料的分离,再生和重新使用的方法 - Google Patents
废乙二醇基浆料的分离,再生和重新使用的方法 Download PDFInfo
- Publication number
- CN1307517A CN1307517A CN99808051A CN99808051A CN1307517A CN 1307517 A CN1307517 A CN 1307517A CN 99808051 A CN99808051 A CN 99808051A CN 99808051 A CN99808051 A CN 99808051A CN 1307517 A CN1307517 A CN 1307517A
- Authority
- CN
- China
- Prior art keywords
- abrasive grain
- slurry
- silicon
- solid
- component portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002002 slurry Substances 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 82
- 238000000926 separation method Methods 0.000 title claims abstract description 15
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 title description 15
- 230000008929 regeneration Effects 0.000 title description 10
- 238000011069 regeneration method Methods 0.000 title description 10
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 title description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 79
- 239000006061 abrasive grain Substances 0.000 claims abstract description 79
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 79
- 239000010703 silicon Substances 0.000 claims abstract description 79
- 239000007787 solid Substances 0.000 claims abstract description 61
- 239000002699 waste material Substances 0.000 claims abstract description 33
- 238000002360 preparation method Methods 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims description 49
- 239000007788 liquid Substances 0.000 claims description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 10
- 239000010687 lubricating oil Substances 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 239000000470 constituent Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims 7
- 235000012431 wafers Nutrition 0.000 abstract description 14
- 239000012530 fluid Substances 0.000 abstract description 7
- 230000001050 lubricating effect Effects 0.000 abstract description 7
- 239000002245 particle Substances 0.000 description 21
- 239000012809 cooling fluid Substances 0.000 description 20
- 239000000725 suspension Substances 0.000 description 18
- 238000004519 manufacturing process Methods 0.000 description 8
- 229910010271 silicon carbide Inorganic materials 0.000 description 7
- 239000004744 fabric Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 2
- -1 and for example Substances 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003828 vacuum filtration Methods 0.000 description 2
- 206010033307 Overweight Diseases 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 125000003827 glycol group Chemical group 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 235000020825 overweight Nutrition 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
- B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0012—Settling tanks making use of filters, e.g. by floating layers of particulate material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0018—Separation of suspended solid particles from liquids by sedimentation provided with a pump mounted in or on a settling tank
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
- B01D21/267—Separation of sediment aided by centrifugal force or centripetal force by using a cyclone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/04—Controlling the filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/12—Devices for exhausting mist of oil or coolant; Devices for collecting or recovering materials resulting from grinding or polishing, e.g. of precious metals, precious stones, diamonds or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
- B28D5/0058—Accessories specially adapted for use with machines for fine working of gems, jewels, crystals, e.g. of semiconductor material
- B28D5/007—Use, recovery or regeneration of abrasive mediums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2221/00—Applications of separation devices
- B01D2221/14—Separation devices for workshops, car or semiconductor industry, e.g. for separating chips and other machining residues
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
Description
浆料种类 | TTV(μm) | 翘曲(μm) | 粗糙度(μm) |
“再生的” | 11 | 10 | 16 |
新的 | 15 | 10 | 20 |
Claims (20)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT98RM000439A IT1299540B1 (it) | 1998-07-01 | 1998-07-01 | Procedimento per separare e rigenerare abrasivo esausto a base di glicole e carburo di silicio ai fini della loro riutilizzazione |
ITRM98A000439 | 1998-07-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1307517A true CN1307517A (zh) | 2001-08-08 |
CN1280077C CN1280077C (zh) | 2006-10-18 |
Family
ID=11406023
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB998080519A Expired - Fee Related CN1280077C (zh) | 1998-07-01 | 1999-07-01 | 废乙二醇基浆料的分离,再生和重新使用的方法 |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0968801B1 (zh) |
KR (1) | KR20010071680A (zh) |
CN (1) | CN1280077C (zh) |
DE (1) | DE69904986T2 (zh) |
IT (1) | IT1299540B1 (zh) |
TW (1) | TW445200B (zh) |
WO (1) | WO2000001519A1 (zh) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100335257C (zh) * | 2004-05-09 | 2007-09-05 | 中山市三和建材有限公司 | 新型phc管桩余浆循环使用方法 |
CN1791497B (zh) * | 2003-04-23 | 2010-10-13 | 金属制造股份有限公司 | 用于清洗碳化硅颗粒的方法 |
CN101033066B (zh) * | 2006-03-06 | 2011-06-22 | 张捷平 | 碳化硅微粉回收的方法 |
CN101681808B (zh) * | 2007-06-15 | 2011-11-30 | 株式会社Silfine | 从半导体晶片制造工艺再生废浆料的再生工艺和再生系统 |
CN102399619A (zh) * | 2011-10-08 | 2012-04-04 | 江苏佳宇资源利用股份有限公司 | 一种从晶硅切割废砂浆中资源化回收切割液组份的方法 |
CN102659113A (zh) * | 2012-05-23 | 2012-09-12 | 北京科技大学 | 微孔膜过滤法回收单晶和多晶硅线切割废料中硅粉的方法 |
CN103347654A (zh) * | 2011-09-07 | 2013-10-09 | 可乐丽股份有限公司 | 冷却剂再生方法 |
CN104711107A (zh) * | 2013-12-12 | 2015-06-17 | 阿米达股份有限公司 | 硅废浆回收系统、冷却液回收液、回收磨粒,回收切削粉 |
CN105235083A (zh) * | 2015-09-30 | 2016-01-13 | 浙江辉弘光电能源有限公司 | 一种硅片切割机用切削液去水结构 |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10056957C1 (de) * | 2000-11-17 | 2002-09-05 | Metallkraft As Kristiansand | Verfahren zum Herstellen nichtoxidischer Keramiken |
KR20020065105A (ko) * | 2001-02-05 | 2002-08-13 | 동안엔지니어링 주식회사 | 반도체 세정폐수 중 절삭가공 폐수에서 농축, 회수된실리콘 입자의 재활용 방법 |
EP1390184B1 (en) * | 2001-05-29 | 2005-08-17 | MEMC Electronic Materials S.P.A. | Method for treating an exhausted glycol-based slurry |
KR100393007B1 (ko) * | 2001-07-09 | 2003-07-31 | (주)풍남반도체테크 | 반도체 웨이퍼 제조공정에서 발생하는 폐슬러리 재생방법및 그 재생시스템 |
KR100823666B1 (ko) * | 2007-09-11 | 2008-04-18 | (주)세미머티리얼즈 | 폐실리콘 슬러지 재생장치 및 방법 |
DE102008022237A1 (de) * | 2008-05-06 | 2009-11-19 | Scholz Recycling Gmbh Nl Erfurt | Verfahren zur Aufbereitung von Slurry |
TWI417938B (zh) * | 2008-09-19 | 2013-12-01 | Wei Ming Chang | 一種處理矽晶板切割廢棄物的製程及裝置 |
KR101047377B1 (ko) | 2008-11-25 | 2011-07-07 | 케미시스 주식회사 | 폐슬러리 재활용 방법 및 장치 |
KR101047383B1 (ko) | 2008-11-25 | 2011-07-08 | 케미시스 주식회사 | 폐슬러리 재활용 방법 및 장치 |
DE102009034949A1 (de) | 2009-07-09 | 2011-01-13 | Akw Apparate + Verfahren Gmbh | Verfahren zur Aufbereitung einer Suspension |
WO2011016996A2 (en) * | 2009-07-27 | 2011-02-10 | Memc Electronic Materials, Inc. | Methods and systems for processing abrasive slurry |
DE102009054076B8 (de) * | 2009-11-20 | 2012-07-05 | Erwin Junker Maschinenfabrik Gmbh | Verfahren zum Abtrennen von Schleiföl aus Schleifschlämmen; Trennstation zur Durchführung des Verfahrens und verfahrenstechnische Anlage |
CN102229209B (zh) * | 2010-09-16 | 2014-07-23 | 蒙特集团(香港)有限公司 | 碳化硅砂料制作过程中产生的非标砂料在太阳能硅片切割砂浆中的使用方法 |
EP2474390A1 (en) * | 2011-01-06 | 2012-07-11 | Tzer-Huang Guo | Method and Apparatus for Recycling and Treating Waste Liquid that has been used in Cutting Mono Silicon |
JP6107668B2 (ja) | 2012-02-17 | 2017-04-05 | コニカミノルタ株式会社 | 研磨材再生方法 |
CN102837261B (zh) * | 2012-08-17 | 2014-11-05 | 江苏嘉洋华联建筑装饰有限公司 | 现浇水磨石地坪打磨废浆液的回收方法 |
US9228246B2 (en) | 2013-01-11 | 2016-01-05 | Alternative Charge Materials, Llc | Method of agglomerating silicon/silicon carbide from wiresawing waste |
JP6172030B2 (ja) | 2014-04-03 | 2017-08-02 | 信越半導体株式会社 | ワークの切断方法及び加工液 |
JP5850192B1 (ja) * | 2015-03-19 | 2016-02-03 | コニカミノルタ株式会社 | 研磨材の回収方法 |
DE102017118017A1 (de) | 2017-08-08 | 2019-02-14 | PDR Recycling GmbH + Co. KG | Recyclingverfahren für Schleifkörner |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4191159A (en) * | 1978-10-16 | 1980-03-04 | Nasa | System for slicing silicon wafers |
DE4405829A1 (de) * | 1994-02-23 | 1995-08-31 | Wacker Chemitronic | Verfahren zur Rückgewinnung von Schneidkorn |
JP3199159B2 (ja) * | 1996-01-26 | 2001-08-13 | 信越半導体株式会社 | 油性スラリー廃液の再利用システム |
US5664990A (en) * | 1996-07-29 | 1997-09-09 | Integrated Process Equipment Corp. | Slurry recycling in CMP apparatus |
JP3620679B2 (ja) * | 1996-08-27 | 2005-02-16 | 信越半導体株式会社 | 遊離砥粒によるウエーハの面取装置及び面取方法 |
-
1998
- 1998-07-01 IT IT98RM000439A patent/IT1299540B1/it active IP Right Grant
-
1999
- 1999-05-04 DE DE69904986T patent/DE69904986T2/de not_active Expired - Lifetime
- 1999-05-04 EP EP99830266A patent/EP0968801B1/en not_active Expired - Lifetime
- 1999-07-01 KR KR1020007014967A patent/KR20010071680A/ko not_active Application Discontinuation
- 1999-07-01 CN CNB998080519A patent/CN1280077C/zh not_active Expired - Fee Related
- 1999-07-01 WO PCT/US1999/014978 patent/WO2000001519A1/en not_active Application Discontinuation
- 1999-08-31 TW TW088114935A patent/TW445200B/zh active
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1791497B (zh) * | 2003-04-23 | 2010-10-13 | 金属制造股份有限公司 | 用于清洗碳化硅颗粒的方法 |
CN100335257C (zh) * | 2004-05-09 | 2007-09-05 | 中山市三和建材有限公司 | 新型phc管桩余浆循环使用方法 |
CN101033066B (zh) * | 2006-03-06 | 2011-06-22 | 张捷平 | 碳化硅微粉回收的方法 |
CN101681808B (zh) * | 2007-06-15 | 2011-11-30 | 株式会社Silfine | 从半导体晶片制造工艺再生废浆料的再生工艺和再生系统 |
CN103347654A (zh) * | 2011-09-07 | 2013-10-09 | 可乐丽股份有限公司 | 冷却剂再生方法 |
CN103347654B (zh) * | 2011-09-07 | 2015-11-25 | 可乐丽股份有限公司 | 冷却剂再生方法 |
CN102399619A (zh) * | 2011-10-08 | 2012-04-04 | 江苏佳宇资源利用股份有限公司 | 一种从晶硅切割废砂浆中资源化回收切割液组份的方法 |
CN102399619B (zh) * | 2011-10-08 | 2013-06-05 | 江苏佳宇资源利用股份有限公司 | 一种从晶硅切割废砂浆中资源化回收切割液组份的方法 |
CN102659113A (zh) * | 2012-05-23 | 2012-09-12 | 北京科技大学 | 微孔膜过滤法回收单晶和多晶硅线切割废料中硅粉的方法 |
CN102659113B (zh) * | 2012-05-23 | 2014-03-26 | 北京科技大学 | 微孔膜过滤法回收单晶和多晶硅线切割废料中硅粉的方法 |
CN104711107A (zh) * | 2013-12-12 | 2015-06-17 | 阿米达股份有限公司 | 硅废浆回收系统、冷却液回收液、回收磨粒,回收切削粉 |
CN105235083A (zh) * | 2015-09-30 | 2016-01-13 | 浙江辉弘光电能源有限公司 | 一种硅片切割机用切削液去水结构 |
Also Published As
Publication number | Publication date |
---|---|
TW445200B (en) | 2001-07-11 |
IT1299540B1 (it) | 2000-03-16 |
KR20010071680A (ko) | 2001-07-31 |
EP0968801B1 (en) | 2003-01-22 |
WO2000001519A1 (en) | 2000-01-13 |
EP0968801A1 (en) | 2000-01-05 |
DE69904986T2 (de) | 2003-11-06 |
DE69904986D1 (de) | 2003-02-27 |
ITRM980439A0 (it) | 1998-07-01 |
ITRM980439A1 (it) | 2000-01-01 |
CN1280077C (zh) | 2006-10-18 |
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