JP5002711B2 - 高電流薄型インダクタの製造方法 - Google Patents
高電流薄型インダクタの製造方法 Download PDFInfo
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- JP5002711B2 JP5002711B2 JP2011003329A JP2011003329A JP5002711B2 JP 5002711 B2 JP5002711 B2 JP 5002711B2 JP 2011003329 A JP2011003329 A JP 2011003329A JP 2011003329 A JP2011003329 A JP 2011003329A JP 5002711 B2 JP5002711 B2 JP 5002711B2
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- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000000843 powder Substances 0.000 claims description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 239000012256 powdered iron Substances 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000000314 lubricant Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 8
- 239000000696 magnetic material Substances 0.000 claims description 8
- YPFNIPKMNMDDDB-UHFFFAOYSA-K 2-[2-[bis(carboxylatomethyl)amino]ethyl-(2-hydroxyethyl)amino]acetate;iron(3+) Chemical compound [Fe+3].OCCN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O YPFNIPKMNMDDDB-UHFFFAOYSA-K 0.000 claims 1
- 239000002245 particle Substances 0.000 claims 1
- 239000000463 material Substances 0.000 description 12
- 239000011162 core material Substances 0.000 description 11
- 238000000465 moulding Methods 0.000 description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- 238000004804 winding Methods 0.000 description 6
- 239000004593 Epoxy Substances 0.000 description 4
- 239000006247 magnetic powder Substances 0.000 description 4
- 239000012778 molding material Substances 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 210000003298 dental enamel Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000010423 industrial mineral Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- XEEYBQQBJWHFJM-YPZZEJLDSA-N iron-54 Chemical compound [54Fe] XEEYBQQBJWHFJM-YPZZEJLDSA-N 0.000 description 1
- XEEYBQQBJWHFJM-IGMARMGPSA-N iron-56 Chemical compound [56Fe] XEEYBQQBJWHFJM-IGMARMGPSA-N 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical group [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F37/00—Fixed inductances not covered by group H01F17/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/041—Printed circuit coils
- H01F41/046—Printed circuit coils structurally combined with ferromagnetic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/045—Fixed inductances of the signal type with magnetic core with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core
- H01F2017/046—Fixed inductances of the signal type with magnetic core with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core helical coil made of flat wire, e.g. with smaller extension of wire cross section in the direction of the longitudinal axis
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49075—Electromagnet, transformer or inductor including permanent magnet or core
- Y10T29/49076—From comminuted material
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49204—Contact or terminal manufacturing
- Y10T29/49208—Contact or terminal manufacturing by assembling plural parts
- Y10T29/4922—Contact or terminal manufacturing by assembling plural parts with molding of insulation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Insulating Of Coils (AREA)
- Coils Of Transformers For General Uses (AREA)
Description
本発明の他の目的は、空隙が存在せず、かつ、コイルを完全に囲包する磁性材料を有する高電流薄型インダクタを提供することである。
本発明の他の目的は、自己遮蔽能力を有する閉磁気系を備えた高電流薄型インダクタを提供することである。
本発明の更に他の目的は、小型で、製造費が安く、かつ、飽和することなく受容することができる電流が従来のインダクタンスコイルより大きい高電流薄型インダクタを提供することである。
本発明の更に他の目的は、より大きい従来のインダクタによって得られるのと同じインダクタンスを得るのに要するコイルのワイヤ巻数が少なくてすみ、従って、インダクタの直列抵抗を低くすることができる高電流薄型インダクタを提供することである。
コイル24は、複数の巻き30を有し、内側コイル端(単に「内端」とも称する)26と外側コイル端(単に「外端」とも称する)28を有する。
第1粉末鉄 1,000gm
第2粉末鉄 1,000gm
充填材 36gm
樹脂 74gm
滑剤 0.3重量%
滑剤を除く上記材料を混合し、次いで、それにアセトンを添加して湿し、マッド(泥)状コンシステンシーの混合物とする。次いで、それを乾燥させて、篩にかけて−50メッシュの粒度のものを選別する。それに上記滑剤を加えて粉末成形材料82を完成する。次いで、この材料82を図7に示されるようにダイ72に導入する。
コイルワイヤは、上述した結合剤のエポキシコートを被覆されている。コイルの結合工程49においては、アセトン48を塗布するか、又は熱を加えることによって結合剤を活性化し、コイル24の各巻き30を結合する。
加圧成形工程64において、図5〜9を参照して先に説明したようにインダクタ本体を加圧成形する。次いで、成形組立体を加熱して樹脂を硬化する。
硬化が完了した後、最後に切断工程66において、リードフレーム32を切断し、リード16,18を折曲げてインダクタ本体14の底面に押し当てる。
本発明の独特の導体巻線は、高電流での作動を可能にし、しかも、インダクタのフートプリント(インダクタの磁気の及ぶ範囲)内での磁気パラメータを最適化する。
本発明の磁性コア材は、表面実装のためのリード間の導電経路なしで作動するように製造されるので、インダクタを使用可能にする(3メガΩを越える)高い抵抗率を有する。又、この磁性コア材は、最高1MHzまでの有効作動を可能にする。本発明のインダクタパッケージは、1マイクロヘンリー当り2ミリΩのインダクタンス率に対して低いDC抵抗率を示す。5以下のインダクタンス率が好ましいと考えられる。
次に、先に説明したのと同じ態様で加圧成形機に上述した混合粉末材料を導入し、加圧成形工程を実施する。最後に、リードフレーム96からリード98,100を切断し、それらを折曲げてデバイス88の底面に押当てる。
14:インダクタ本体
16:第1リード
18:第2リード
24:ワイヤコイル
26:第1コイル端又は内側コイル端
28:第2コイル端又は外側コイル端
36:第1リードの自由端
40:第2リードの自由端
88:高電流薄型インダクタ
90:ワイヤコイル
92:第1コイル端
94:第2コイル端
98:第1リード
100:第2リード
Claims (3)
- 高電流薄型インダクタを製造するための方法であって、
コイルから成るインダクタ素子を形成し、
絶縁処理された粉末磁性鉄と、充填材と、乾燥樹脂とから成る乾燥粉末混合物を調製し、
該乾燥粉末混合物を篩にかけて選別して−50メッシュの粒度の混合物とし、
該乾燥粉末混合物を2.54cm(1インチ)当りほぼ15〜20tnの力を用いて前記コイルの周りに乾燥状態のままで圧縮することによって、実質的に空隙がなく、該絶縁処理された磁性鉄が該コイルを遮蔽して成るインダクタ本体を形成し、
該圧縮されたインダクタ本体を硬化させることから成り、
前記乾燥粉末混合物は、重量比でみて36gmの充填材及び74gmの乾燥樹脂に対して2000gmの前記絶縁処理された粉末磁性鉄を有することを特徴とする方法。
- 前記乾燥粉末混合物は、滑剤を含み、重量比でみて36gmの前記充填材と、0.3重量%の該滑剤と、74gmの前記乾燥樹脂に対して2000gmの前記絶縁処理された粉末磁性鉄を有することを特徴とする請求項1に記載の方法。
- 前記乾燥粉末混合物中の前記絶縁処理された粉末磁性鉄は、第1粉末鉄と、第2粉末鉄を含むことを特徴とする請求項1に記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US50365595A | 1995-07-18 | 1995-07-18 | |
US08/503,655 | 1995-07-18 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009174713A Division JP2009246398A (ja) | 1995-07-18 | 2009-07-27 | 高電流薄型インダクタの製造方法 |
Related Child Applications (1)
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JP2012021276A Division JP2012124513A (ja) | 1995-07-18 | 2012-02-02 | 高電流薄型インダクタの製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2011097087A JP2011097087A (ja) | 2011-05-12 |
JP5002711B2 true JP5002711B2 (ja) | 2012-08-15 |
Family
ID=24002973
Family Applications (5)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8206542A Pending JPH09120926A (ja) | 1995-07-18 | 1996-07-17 | 高電流薄型インダクタ及びその製造方法 |
JP2009174713A Pending JP2009246398A (ja) | 1995-07-18 | 2009-07-27 | 高電流薄型インダクタの製造方法 |
JP2011003329A Expired - Lifetime JP5002711B2 (ja) | 1995-07-18 | 2011-01-11 | 高電流薄型インダクタの製造方法 |
JP2012021276A Pending JP2012124513A (ja) | 1995-07-18 | 2012-02-02 | 高電流薄型インダクタの製造方法 |
JP2013002800A Pending JP2013084988A (ja) | 1995-07-18 | 2013-01-10 | 高電流薄型インダクタの製造方法 |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8206542A Pending JPH09120926A (ja) | 1995-07-18 | 1996-07-17 | 高電流薄型インダクタ及びその製造方法 |
JP2009174713A Pending JP2009246398A (ja) | 1995-07-18 | 2009-07-27 | 高電流薄型インダクタの製造方法 |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2012021276A Pending JP2012124513A (ja) | 1995-07-18 | 2012-02-02 | 高電流薄型インダクタの製造方法 |
JP2013002800A Pending JP2013084988A (ja) | 1995-07-18 | 2013-01-10 | 高電流薄型インダクタの製造方法 |
Country Status (7)
Country | Link |
---|---|
US (2) | US6204744B1 (ja) |
JP (5) | JPH09120926A (ja) |
KR (1) | KR100228117B1 (ja) |
CA (1) | CA2180992C (ja) |
DE (1) | DE19628897C2 (ja) |
FR (1) | FR2737038B1 (ja) |
GB (1) | GB2303494B (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202020001160U1 (de) | 2020-03-16 | 2020-04-16 | Michael Dienst | Elektrischer Spulenkörper für Hubkraftmaschinen |
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US7263761B1 (en) | 1995-07-18 | 2007-09-04 | Vishay Dale Electronics, Inc. | Method for making a high current low profile inductor |
US7034645B2 (en) | 1999-03-16 | 2006-04-25 | Vishay Dale Electronics, Inc. | Inductor coil and method for making same |
US6198375B1 (en) * | 1999-03-16 | 2001-03-06 | Vishay Dale Electronics, Inc. | Inductor coil structure |
US7362015B2 (en) * | 1996-07-29 | 2008-04-22 | Iap Research, Inc. | Apparatus and method for making an electrical component |
WO1999017318A1 (fr) * | 1997-10-01 | 1999-04-08 | Microspire | Composant inductif et procede de fabrication d'un tel composant |
JP3752848B2 (ja) * | 1998-05-12 | 2006-03-08 | 株式会社村田製作所 | インダクタ |
DE69922094T2 (de) * | 1998-07-31 | 2005-12-01 | Hitachi, Ltd. | Transformatorkern aus amorphem Metall |
JP2000106312A (ja) * | 1998-09-29 | 2000-04-11 | Murata Mfg Co Ltd | 複合インダクタ素子 |
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JP4684461B2 (ja) * | 2000-04-28 | 2011-05-18 | パナソニック株式会社 | 磁性素子の製造方法 |
JP2002083732A (ja) * | 2000-09-08 | 2002-03-22 | Murata Mfg Co Ltd | インダクタ及びその製造方法 |
JP2002208524A (ja) * | 2001-01-10 | 2002-07-26 | Sony Corp | トランス装置 |
JP4701531B2 (ja) * | 2001-01-18 | 2011-06-15 | パナソニック株式会社 | 圧粉磁芯 |
TW200419600A (en) * | 2002-12-06 | 2004-10-01 | Toko Inc | Complex magnetic material, and core and magnetic element using the complex magnetic material |
US8237530B2 (en) * | 2009-08-10 | 2012-08-07 | Volterra Semiconductor Corporation | Coupled inductor with improved leakage inductance control |
US8416043B2 (en) | 2010-05-24 | 2013-04-09 | Volterra Semiconductor Corporation | Powder core material coupled inductors and associated methods |
US9013259B2 (en) | 2010-05-24 | 2015-04-21 | Volterra Semiconductor Corporation | Powder core material coupled inductors and associated methods |
US8299885B2 (en) | 2002-12-13 | 2012-10-30 | Volterra Semiconductor Corporation | Method for making magnetic components with M-phase coupling, and related inductor structures |
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- 1996-07-17 DE DE19628897A patent/DE19628897C2/de not_active Expired - Lifetime
- 1996-07-17 JP JP8206542A patent/JPH09120926A/ja active Pending
- 1996-07-17 FR FR9608963A patent/FR2737038B1/fr not_active Expired - Lifetime
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DE202020001160U1 (de) | 2020-03-16 | 2020-04-16 | Michael Dienst | Elektrischer Spulenkörper für Hubkraftmaschinen |
Also Published As
Publication number | Publication date |
---|---|
DE19628897A1 (de) | 1997-01-23 |
US6460244B1 (en) | 2002-10-08 |
JP2011097087A (ja) | 2011-05-12 |
KR970008240A (ko) | 1997-02-24 |
US6204744B1 (en) | 2001-03-20 |
KR100228117B1 (ko) | 1999-11-01 |
JP2012124513A (ja) | 2012-06-28 |
JP2009246398A (ja) | 2009-10-22 |
JPH09120926A (ja) | 1997-05-06 |
FR2737038A1 (fr) | 1997-01-24 |
GB9614656D0 (en) | 1996-09-04 |
FR2737038B1 (fr) | 1998-03-20 |
GB2303494B (en) | 2000-03-22 |
DE19628897C2 (de) | 1999-12-16 |
CA2180992C (en) | 1999-05-18 |
JP2013084988A (ja) | 2013-05-09 |
GB2303494A (en) | 1997-02-19 |
CA2180992A1 (en) | 1997-01-19 |
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