DE2633869C2 - Verfahren zum Verbinden von Kupfer mit einem Substrat aus Keramikmaterial - Google Patents
Verfahren zum Verbinden von Kupfer mit einem Substrat aus KeramikmaterialInfo
- Publication number
- DE2633869C2 DE2633869C2 DE2633869A DE2633869A DE2633869C2 DE 2633869 C2 DE2633869 C2 DE 2633869C2 DE 2633869 A DE2633869 A DE 2633869A DE 2633869 A DE2633869 A DE 2633869A DE 2633869 C2 DE2633869 C2 DE 2633869C2
- Authority
- DE
- Germany
- Prior art keywords
- copper
- substrate
- layer
- eutectic
- oxide
- 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.)
- Expired
Links
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
- C04B37/02—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles
- C04B37/023—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles characterised by the interlayer used
- C04B37/026—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles characterised by the interlayer used consisting of metals or metal salts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/14—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams
- B23K1/18—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams circumferential seams, e.g. of shells
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/19—Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/001—Interlayers, transition pieces for metallurgical bonding of workpieces
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- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/0332—Structure of the conductor
- H05K2201/0335—Layered conductors or foils
- H05K2201/0355—Metal foils
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/20—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern by affixing prefabricated conductor pattern
- H05K3/202—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern by affixing prefabricated conductor pattern using self-supporting metal foil pattern
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
- Laminated Bodies (AREA)
- Manufacturing Of Printed Wiring (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Die Bonding (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/600,300 US3994430A (en) | 1975-07-30 | 1975-07-30 | Direct bonding of metals to ceramics and metals |
| US05/696,899 US4129243A (en) | 1975-07-30 | 1976-06-17 | Double side cooled, pressure mounted semiconductor package and process for the manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2633869A1 DE2633869A1 (de) | 1977-02-17 |
| DE2633869C2 true DE2633869C2 (de) | 1985-09-05 |
Family
ID=27083564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2633869A Expired DE2633869C2 (de) | 1975-07-30 | 1976-07-28 | Verfahren zum Verbinden von Kupfer mit einem Substrat aus Keramikmaterial |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4129243A (enExample) |
| JP (2) | JPS604154B2 (enExample) |
| DE (1) | DE2633869C2 (enExample) |
| FR (1) | FR2319600A1 (enExample) |
| GB (1) | GB1559590A (enExample) |
| MX (1) | MX3498E (enExample) |
| NL (1) | NL179645C (enExample) |
| SE (1) | SE426580B (enExample) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3626232A1 (de) * | 1986-08-02 | 1988-03-10 | Akyuerek Susanne | Verfahren zur herstellung einer leiterplatte |
| DE3701108A1 (de) * | 1987-01-16 | 1988-07-28 | Akyuerek Altan | Verfahren zum verbinden zweier metallteile |
Families Citing this family (77)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3036128C2 (de) * | 1980-09-25 | 1983-08-18 | Brown, Boveri & Cie Ag, 6800 Mannheim | Verfahren zum direkten Verbinden von Kupferfolien mit Oxidkeramiksubstraten |
| FR2493043B1 (fr) * | 1980-10-23 | 1987-01-16 | Silicium Semiconducteur Ssc | Montage sans alliage d'un composant semi-conducteur de puissance en boitier presse |
| JPS5792585A (en) * | 1980-11-27 | 1982-06-09 | Ngk Spark Plug Co | Method of bonding ceramics and metal plate |
| JPS57100737A (en) * | 1980-12-16 | 1982-06-23 | Toshiba Corp | Semiconductor device |
| US4408218A (en) * | 1981-03-27 | 1983-10-04 | Amp Incorporated | Ceramic chip carrier with lead frame having removable rim |
| US4362902A (en) * | 1981-03-27 | 1982-12-07 | Amp Incorporated | Ceramic chip carrier |
| DE3127458A1 (de) * | 1981-07-11 | 1983-02-03 | Brown, Boveri & Cie Ag, 6800 Mannheim | Elektrische verbindungslasche fuer halbleiterbauelemente |
| EP0072644B1 (en) * | 1981-08-14 | 1986-03-26 | AMP INCORPORATED (a New Jersey corporation) | Semiconductor chip carrier |
| DE3147790A1 (de) * | 1981-12-03 | 1983-06-09 | Brown, Boveri & Cie Ag, 6800 Mannheim | Leistungsmodul und verfahren zu seiner herstellung |
| DE3147789A1 (de) * | 1981-12-03 | 1983-06-09 | Brown, Boveri & Cie Ag, 6800 Mannheim | Leistungsmodul und verfahren zu seiner herstellung |
| DE3204167A1 (de) * | 1982-02-06 | 1983-08-11 | Brown, Boveri & Cie Ag, 6800 Mannheim | Verfahren zum direkten verbinden von metallstuecken mit oxidkeramiksubstraten |
| JPS58137285A (ja) * | 1982-02-10 | 1983-08-15 | 株式会社日立製作所 | 金属板付セラミック基板の製造法 |
| US4500029A (en) * | 1982-06-11 | 1985-02-19 | General Electric Company | Electrical assembly including a conductor pattern bonded to a non-metallic substrate and method of fabricating such assembly |
| JPS593077A (ja) * | 1982-06-29 | 1984-01-09 | 株式会社東芝 | セラミツク部材と金属との接合方法 |
| DE3376829D1 (en) * | 1982-06-29 | 1988-07-07 | Toshiba Kk | Method for directly bonding ceramic and metal members and laminated body of the same |
| JPS59190279A (ja) * | 1983-04-13 | 1984-10-29 | 株式会社東芝 | セラミツクス構造体及びその製造方法 |
| DE3324661A1 (de) * | 1983-07-08 | 1985-01-17 | Brown, Boveri & Cie Ag, 6800 Mannheim | Verfahren zum direkten verbinden von metall mit keramik |
| US4769744A (en) * | 1983-08-04 | 1988-09-06 | General Electric Company | Semiconductor chip packages having solder layers of enhanced durability |
| FR2556132B1 (fr) * | 1983-12-01 | 1987-05-07 | Ceraver | Procede d'assemblage d'un boitier d'un composant semi-conducteur |
| JPS60131873A (ja) * | 1983-12-15 | 1985-07-13 | 株式会社東芝 | セラミツクス−金属直接接合体およびその製造方法 |
| JPH0785495B2 (ja) * | 1985-03-18 | 1995-09-13 | ティーディーケイ株式会社 | 酸化物セラミツク上の銅電極形成法 |
| JPS61220836A (ja) * | 1985-03-28 | 1986-10-01 | 株式会社東芝 | セラミツクス回路基板 |
| JPH062386B2 (ja) * | 1985-03-29 | 1994-01-12 | 株式会社東芝 | セラミックス回路基板の製造方法 |
| JPS61227035A (ja) * | 1985-03-30 | 1986-10-09 | 株式会社東芝 | セラミツクス回路基板 |
| US4905075A (en) * | 1986-05-05 | 1990-02-27 | General Electric Company | Hermetic semiconductor enclosure |
| DE3633907A1 (de) * | 1986-08-02 | 1988-02-04 | Altan Akyuerek | Verfahren zum haftfesten verbinden eines kupferkoerpers mit einem substrat |
| JPS63166774A (ja) * | 1986-12-27 | 1988-07-09 | 同和鉱業株式会社 | 銅板とアルミナ基板との接合体の製造方法 |
| DE3724995A1 (de) * | 1987-02-26 | 1988-09-08 | Radex Heraklith | Verfahren zur herstellung eines verbundkoerpers und verbundkoerper selbst |
| JP2566142B2 (ja) * | 1987-04-14 | 1996-12-25 | 昭和電工株式会社 | 回路形成方法 |
| US4788765A (en) * | 1987-11-13 | 1988-12-06 | Gentron Corporation | Method of making circuit assembly with hardened direct bond lead frame |
| JPH01241193A (ja) * | 1988-03-23 | 1989-09-26 | Toshiba Corp | セラミックス基板 |
| US4990720A (en) * | 1988-04-12 | 1991-02-05 | Kaufman Lance R | Circuit assembly and method with direct bonded terminal pin |
| US5032691A (en) * | 1988-04-12 | 1991-07-16 | Kaufman Lance R | Electric circuit assembly with voltage isolation |
| US4902854A (en) * | 1988-04-12 | 1990-02-20 | Kaufman Lance R | Hermetic direct bond circuit assembly |
| US4831723A (en) * | 1988-04-12 | 1989-05-23 | Kaufman Lance R | Direct bond circuit assembly with crimped lead frame |
| US5070602A (en) * | 1988-04-12 | 1991-12-10 | Lance R. Kaufman | Method of making a circuit assembly |
| US4879633A (en) * | 1988-04-12 | 1989-11-07 | Kaufman Lance R | Direct bond circuit assembly with ground plane |
| US4924292A (en) * | 1988-04-12 | 1990-05-08 | Kaufman Lance R | Direct bond circuit assembly with crimped lead frame |
| US4860164A (en) * | 1988-09-01 | 1989-08-22 | Kaufman Lance R | Heat sink apparatus with electrically insulative intermediate conduit portion for coolant flow |
| JPH0272695A (ja) * | 1988-09-07 | 1990-03-12 | Toshiba Lighting & Technol Corp | 混成集積回路 |
| GB2225484A (en) * | 1988-11-25 | 1990-05-30 | Westinghouse Brake & Signal | Semiconductor device assembly |
| DE3844264A1 (de) * | 1988-12-30 | 1990-07-05 | Akyuerek Altan | Traegerkoerper fuer elektronische schaltungsstrukturen und verfahren zur herstellung eines solchen traegerkoerpers |
| US5100740A (en) * | 1989-09-25 | 1992-03-31 | General Electric Company | Direct bonded symmetric-metallic-laminate/substrate structures |
| US5653379A (en) * | 1989-12-18 | 1997-08-05 | Texas Instruments Incorporated | Clad metal substrate |
| US5241216A (en) * | 1989-12-21 | 1993-08-31 | General Electric Company | Ceramic-to-conducting-lead hermetic seal |
| US5273203A (en) * | 1989-12-21 | 1993-12-28 | General Electric Company | Ceramic-to-conducting-lead hermetic seal |
| US4996116A (en) * | 1989-12-21 | 1991-02-26 | General Electric Company | Enhanced direct bond structure |
| US5164359A (en) * | 1990-04-20 | 1992-11-17 | Eaton Corporation | Monolithic integrated circuit having compound semiconductor layer epitaxially grown on ceramic substrate |
| JP3011433B2 (ja) * | 1990-05-25 | 2000-02-21 | 株式会社東芝 | セラミックス回路基板の製造方法 |
| US5139972A (en) * | 1991-02-28 | 1992-08-18 | General Electric Company | Batch assembly of high density hermetic packages for power semiconductor chips |
| US5573692A (en) * | 1991-03-11 | 1996-11-12 | Philip Morris Incorporated | Platinum heater for electrical smoking article having ohmic contact |
| CA2146123C (en) * | 1992-10-20 | 2005-01-11 | Janusz Kuzma | Package and method of construction |
| US5402006A (en) * | 1992-11-10 | 1995-03-28 | Texas Instruments Incorporated | Semiconductor device with enhanced adhesion between heat spreader and leads and plastic mold compound |
| DE4319848C2 (de) * | 1993-06-03 | 1995-12-21 | Schulz Harder Juergen | Verfahren zum Herstellen eines Metall-Keramik-Substrates |
| EP0650193A3 (en) * | 1993-10-25 | 1996-07-31 | Toshiba Kk | Semiconductor device and method for its production. |
| CA2140311A1 (en) * | 1994-01-14 | 1995-07-15 | Joseph P. Mennucci | Multilayer laminate product and process |
| US5777259A (en) * | 1994-01-14 | 1998-07-07 | Brush Wellman Inc. | Heat exchanger assembly and method for making the same |
| JP2918191B2 (ja) | 1994-04-11 | 1999-07-12 | 同和鉱業株式会社 | 金属−セラミックス複合部材の製造方法 |
| US5965193A (en) | 1994-04-11 | 1999-10-12 | Dowa Mining Co., Ltd. | Process for preparing a ceramic electronic circuit board and process for preparing aluminum or aluminum alloy bonded ceramic material |
| US6022426A (en) * | 1995-05-31 | 2000-02-08 | Brush Wellman Inc. | Multilayer laminate process |
| JP3849381B2 (ja) * | 1999-12-20 | 2006-11-22 | 株式会社日立製作所 | 絶縁回路基板の製造方法 |
| DE10148550B4 (de) * | 2001-10-01 | 2007-03-29 | Electrovac Ag | Verfahren zum Herstellen von Metall-Keramik-Verbundmaterialien, insbesondere Metall-Keramik-Substraten |
| US7159757B2 (en) * | 2002-09-26 | 2007-01-09 | Dowa Mining Co., Ltd. | Metal/ceramic bonding article and method for producing same |
| JP3935037B2 (ja) | 2002-09-30 | 2007-06-20 | Dowaホールディングス株式会社 | アルミニウム−セラミックス接合基板の製造方法 |
| JP4500065B2 (ja) * | 2004-02-19 | 2010-07-14 | Dowaホールディングス株式会社 | アルミナ部材と銅電極との接合方法およびアルミナ部材と銅電極との接合体 |
| US20070231590A1 (en) * | 2006-03-31 | 2007-10-04 | Stellar Industries Corp. | Method of Bonding Metals to Ceramics |
| US20100132932A1 (en) * | 2007-04-24 | 2010-06-03 | Ceramtec Ag | Method for producing a metalized component, corresponding component, and a substrate for supporting the component during metalization |
| DE102010007919B4 (de) | 2010-02-12 | 2022-03-03 | Rogers Germany Gmbh | Verfahren zum Herstellen von Metall-Keramik-Substraten sowie nach diesem Verfahren hergestelltes Metall-Keramik-Substrat |
| DE102014104510B4 (de) * | 2014-03-31 | 2019-02-07 | Gottfried Wilhelm Leibniz Universität Hannover | Verfahren zum Fügen und Einrichtung zum Fügen einer Anordnung unter Verwendung des Verfahrens |
| JP2015224151A (ja) * | 2014-05-27 | 2015-12-14 | Ngkエレクトロデバイス株式会社 | Cu/セラミック基板 |
| JP6645281B2 (ja) * | 2016-03-14 | 2020-02-14 | 三菱マテリアル株式会社 | セラミックス/アルミニウム接合体の製造方法、及び、パワーモジュール用基板の製造方法 |
| CN107819066B (zh) * | 2017-10-26 | 2018-10-16 | 成都万士达瓷业有限公司 | 一种低氧铜烧结dbc半导体热电基片的生产方法 |
| DE102018101198A1 (de) * | 2018-01-19 | 2019-07-25 | Osram Opto Semiconductors Gmbh | Verfahren zum herstellen eines gehäusedeckels für ein laserbauelement und gehäusedeckel für ein laserbauelement sowie laserbauelement |
| JP7543635B2 (ja) * | 2018-04-11 | 2024-09-03 | Agc株式会社 | 配線膜および配線膜の形成方法 |
| TWI654914B (zh) * | 2018-07-31 | 2019-03-21 | 國家中山科學研究院 | Method for improving adhesion of ceramic carrier board and thick film circuit |
| JP6602450B2 (ja) * | 2018-12-11 | 2019-11-06 | Ngkエレクトロデバイス株式会社 | Cu/セラミック基板 |
| CN117457504B (zh) * | 2023-12-22 | 2024-03-08 | 成都万士达瓷业有限公司 | 一种陶瓷封装表面覆铜的生产方法 |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA545179A (en) * | 1957-08-20 | N. Sayers Frank | Bonding of metals to ceramics | |
| GB697070A (en) * | 1951-01-11 | 1953-09-16 | Erie Resistor Corp | Improvements in electric components comprising resistances and capacitances |
| GB761045A (en) * | 1952-08-29 | 1956-11-07 | Lodge Plugs Ltd | Improvements in or relating to the bonding of ceramics with copper |
| FR1100497A (fr) * | 1953-05-12 | 1955-09-20 | Philips Nv | Procédé d'assemblage d'objets céramiques entre eux ou à des objets métalliques |
| US2857663A (en) * | 1954-02-09 | 1958-10-28 | Gen Electric | Metallic bond |
| US3224088A (en) * | 1961-11-15 | 1965-12-21 | Inland Steel Co | Process for producing multi-layer metallic material |
| US3550254A (en) * | 1968-04-05 | 1970-12-29 | North American Rockwell | Method and means for solid state joinder |
| DE2014289A1 (de) * | 1970-03-25 | 1971-10-14 | Semikron Gleichrichterbau | Scheibenförmiges Halbleiterbauele ment und Verfahren zu seiner Herstellung |
| US3751800A (en) * | 1970-08-04 | 1973-08-14 | Gen Motors Corp | Method of fabricating a semiconductor enclosure |
| US3981429A (en) * | 1970-10-16 | 1976-09-21 | Rohr Industries, Inc. | Method for plated foil liquid interface diffusion bonding of titanium |
| US3736650A (en) * | 1971-06-01 | 1973-06-05 | Varian Associates | Method for making metal-to-ceramic seals |
| US3766634A (en) * | 1972-04-20 | 1973-10-23 | Gen Electric | Method of direct bonding metals to non-metallic substrates |
| US3744120A (en) * | 1972-04-20 | 1973-07-10 | Gen Electric | Direct bonding of metals with a metal-gas eutectic |
| US3994430A (en) * | 1975-07-30 | 1976-11-30 | General Electric Company | Direct bonding of metals to ceramics and metals |
-
1976
- 1976-06-17 US US05/696,899 patent/US4129243A/en not_active Expired - Lifetime
- 1976-07-28 DE DE2633869A patent/DE2633869C2/de not_active Expired
- 1976-07-28 SE SE7608523A patent/SE426580B/xx not_active IP Right Cessation
- 1976-07-29 JP JP51090757A patent/JPS604154B2/ja not_active Expired
- 1976-07-30 NL NLAANVRAGE7608549,A patent/NL179645C/xx not_active IP Right Cessation
- 1976-07-30 FR FR7623315A patent/FR2319600A1/fr active Granted
- 1976-07-30 MX MX762113U patent/MX3498E/es unknown
- 1976-07-30 GB GB31858/76A patent/GB1559590A/en not_active Expired
-
1989
- 1989-04-18 JP JP1096541A patent/JPH01308885A/ja active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3626232A1 (de) * | 1986-08-02 | 1988-03-10 | Akyuerek Susanne | Verfahren zur herstellung einer leiterplatte |
| DE3701108A1 (de) * | 1987-01-16 | 1988-07-28 | Akyuerek Altan | Verfahren zum verbinden zweier metallteile |
Also Published As
| Publication number | Publication date |
|---|---|
| NL179645B (nl) | 1986-05-16 |
| FR2319600A1 (fr) | 1977-02-25 |
| FR2319600B1 (enExample) | 1982-08-20 |
| JPH0427195B2 (enExample) | 1992-05-11 |
| JPH01308885A (ja) | 1989-12-13 |
| GB1559590A (en) | 1980-01-23 |
| NL7608549A (nl) | 1977-02-01 |
| SE426580B (sv) | 1983-01-31 |
| DE2633869A1 (de) | 1977-02-17 |
| NL179645C (nl) | 1986-10-16 |
| JPS5237914A (en) | 1977-03-24 |
| JPS604154B2 (ja) | 1985-02-01 |
| SE7608523L (sv) | 1977-01-31 |
| US4129243A (en) | 1978-12-12 |
| MX3498E (es) | 1981-01-05 |
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| 8364 | No opposition during term of opposition | ||
| 8328 | Change in the person/name/address of the agent |
Free format text: SIEB, R., DIPL.-CHEM. DR.RER.NAT., PAT.-ANW., 6947 LAUDENBACH |