EP1228266B1 - Procede de metallisation d'un substrat isolant par voie electrochimique - Google Patents
Procede de metallisation d'un substrat isolant par voie electrochimique Download PDFInfo
- Publication number
- EP1228266B1 EP1228266B1 EP00966282A EP00966282A EP1228266B1 EP 1228266 B1 EP1228266 B1 EP 1228266B1 EP 00966282 A EP00966282 A EP 00966282A EP 00966282 A EP00966282 A EP 00966282A EP 1228266 B1 EP1228266 B1 EP 1228266B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal
- substrate
- film
- electrochemical cell
- cathode
- 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 - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/54—Electroplating of non-metallic surfaces
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/54—Electroplating of non-metallic surfaces
- C25D5/56—Electroplating of non-metallic surfaces of plastics
Definitions
- the present invention relates to a method of metallization of an insulating substrate electrochemically.
- the oldest processes consist in putting the insulating plate to be metallized in contact with a solution of a salt of the metal and a reducing solution which causes a precipitation.
- the contacting can be done by watering or by immersion. These methods require the use a mixture of salts and optionally additives. In addition, they do not allow to control neither the speed of deposit, nor the texture, that is to say the quality of the deposit obtained.
- V. Fleury "Branched fractal patterns in non-equilibrium electrochemical deposition from oscillatory nucleation and growth", Nature, Vol. 390, Nov. 1997, 145-148] discloses a method for depositing a copper film on a galvanically insulating substrate. The surface to be metallized of the insulating substrate is covered with a thin film of gold.
- the substrate is then placed in a solution of a copper salt and is connected to an anode constituted by copper and a cathode constituted by a gold film, the two electrodes being connected to a current generator.
- the deposit on the surface of the insulating substrate is obtained by reducing the copper at the cathode.
- the reduced metal begins to settle at the cathode, then the deposit continues on the surface to be metallized covered with the thin non-conductive gold film. But in this case too, it leads to a dendritic growth that does not form a regular thin film completely covering.
- the structure of the deposit is extremely arborescent and tortuous.
- the research carried out by the inventor made it possible show that when an electrochemical process is used to grow powders along the surface of a substrate, by applying to the electrochemical cell a density much higher current than the densities of current beyond which it could not, according to the art previous, obtain that three-dimensional powders, one obtained on the substrate a deposit in which the grains arrange to form a uniform film covering and not more dendrites.
- the subject of the present invention is a electrochemical process for deposition on a substrate insulation, a continuous thin metal film.
- the current can vary within the above range. It is however preferable to operate in galvanostatic mode by imposing a current constant to improve the homogeneity of the deposited film.
- the method of the invention can be implemented to metallize a wide variety of insulating substrates, such as examples of plates or glass fibers, plates or Teflon® threads, filter paper, ceramic.
- the solvent of the electrolyte may be aqueous or non-aqueous. Aqueous solutions are particularly preferred for the simplicity of their implementation.
- the salt concentration of the electrolyte is preferably between 0.02 and 0.05 mol.l -1 .
- the device comprises an electrochemical cell 1 connected to a generator 2.
- Cell 1 is constituted by two rectangular glass slides 3 and 4 placed vertically and parallel to each other, one of the sides (of length L) of the blades being placed horizontally.
- the substrate to be metallized is the face of the oriented blade 3 towards the inside of the cell.
- Blades 3 and 4 are maintained spaced at a distance h by a separator 5.
- the separator 5 may be a blade or a wire of the metal M or a another stable metal with respect to the electrolyte, that is to say a metal that has a higher oxidation potential than that of the metal M, so as to avoid the deposit of type electroless.
- the distance h is preferably between about 50 ⁇ m and a few mm.
- a cathode 6, located at the upper part of the blade 3, can be constituted by a simple painting of metal (type "silver lacquer") filed on the upper edge of the blade 3.
- An anode 7, located at the lower part of the blade 3, can be constituted by a wire or sheet of metal M.
- the separator 5 is also used contact between the generator 2 and the electrode 6.
- the anode 7 also serves as a separator.
- the anode is directly connected to the substrate. Islands of metal M 'in layer 8 sufficiently thin to be non-percolating, are deposited on the face to be metallized of the blade 3.
- the intensity of the current applied to the cell which makes it possible to obtain a uniform and covering film of metal M is between 100. and 2000 ⁇ A, when the salt concentration C of the metal M in the electrolyte is of the order of 0.05 mol / liter.
- This intensity of current applied to the electrochemical cell causes a current density between 2.5 and 50 mA per cm 2 of surface in the horizontal section of the cell at the level of the growth front of the deposit.
- e 2h x C / C M.
- the thickness e of the film can be varied by altering the concentration of metal salt M in the electrolyte.
- the electrochemical cell can be adapted from in a way that the deposition of the metal M takes place continuously. we then pulls the substrate vertically upwards through the cell, as the part immersed in the electrolyte is covered with metal.
- the cell consists of a glass tube segment capillary, inner diameter 1 mm and length 3 cm, curved U-shaped, so that both openings are located in the upper position, to prevent the electrolyte from disperses by gravity.
- the tube was filled with a solution of silver nitrate.
- Fiberglass which has a diameter 200 ⁇ m, was coated with a silver lacquer primer and vertically into one of the openings, up to that the cathodic portion serving as a primer is immersed in the electrolyte to a depth of about 2 mm.
- a wire counter electrode anode
- the current was circulated through the tube by imposing a constant current of 100 ⁇ A between the primer on the fiber and the anode. We thus obtained a uniform deposit of a metal film on the fiber. The fiber has then removed by pulling it upwards, making sure to do not scrape the metallized fiber on the edges of the tube glass.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
- Electrolytic Production Of Metals (AREA)
- Insulated Metal Substrates For Printed Circuits (AREA)
- Manufacturing Of Printed Wiring (AREA)
- Chemically Coating (AREA)
Description
- on applique initialement sur une extrémité du substrat un film conducteur qui constituera la cathode ;
- on place le substrat dans la cellule électrochimique de telle manière que la surface à métalliser soit verticale et la cathode située à la partie supérieure ;
- on impose à la cellule électrochimique un courant ayant une intensité telle qu'elle crée une densité de courant comprise entre 1 et 50 mA/cm2 dans la section horizontale de la cellule électrochimique à la hauteur du front de croissance du film qui se dépose.
Claims (9)
- Procédé de métallisation d'un substrat isolant par dépôt d'un film mince uniforme d'un métal M sur ledit substrat isolant, ledit métal M étant choisi parmi le cuivre, l'argent, le cobalt, le fer ou l'étain, ledit procédé consistant à placer ledit substrat isolant dans une cellule électrochimique qui contient comme électrolyte une solution d'un sel du métal M dans un solvant et qui comprend une anode constituée par le métal M et une cathode en contact direct avec le substrat isolant, puis à effectuer une électrolyse à courant constant, ledit procédé étant caractérisé en ce que :on applique initialement sur une extrémité du substrat un film conducteur qui constituera la cathode ;on place le substrat dans la cellule électrochimique de telle manière que la surface à métalliser soit verticale, et la cathode située à la partie supérieure ;on impose à la cellule électrochimique un courant ayant une intensité telle qu'elle crée une densité de courant comprise entre 1 et 50 mA/cm2 dans la section horizontale de la cellule électrochimique à la hauteur du front de croissance du film qui se dépose.
- Procédé selon la revendication 1, caractérisé en ce que le substrat isolant est une plaque ou un fil de verre, une plaque ou un fil de Téflon®, du papier filtre, ou une plaque de céramique.
- Procédé selon la revendication 1, caractérisé en ce que l'électrolyte est une solution aqueuse de sulfate de cuivre, de chlorure de cuivre, de nitrate d'argent, de chlorure d'étain ou de chlorure de fer, ayant une concentration en sel supérieure à 10-3 mol.l-1.
- Procédé selon la revendication 43, caractérisé en ce que la concentration en sel est comprise entre 0,02 et 0,05 mol.l-1.
- Procédé selon la revendication 1, caractérisé en ce que l'on prétraite la surface du substrat à métalliser par dépôt d'un film métallique mince non percolant et donc non conducteur, d'un métal stable à l'air sous la forme métallique.
- Procédé selon la revendication 5, caractérisé en ce que le film métallique mince non percolant est constitué par de l'or ou du palladium.
- Procédé selon la revendication 1, caractérisé en ce que l'intensité du courant appliqué à la cellule électrochimique est comprise entre 2,5 et 50 mA pour une section de cellule de 1 cm2.
- Procédé selon la revendication 1, caractérisé en ce que le substrat est une plaque rectangulaire placée verticalement dans la cellule électrochimique, la partie supérieure de la plaque portant ledit film conducteur servant de cathode, la partie opposée de la plaque étant reliée à l'anode de métal M.
- Procédé selon la revendication 1, caractérisé en ce que le substrat est un fil dont une extrémité est recouverte d'un film conducteur et constitue la cathode, l'autre extrémité étant soit libre, soit reliée directement à une anode de métal M.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9912644 | 1999-10-11 | ||
FR9912644A FR2799475B1 (fr) | 1999-10-11 | 1999-10-11 | Procede de metallisation d'un substrat isolant par voie electrochimique |
PCT/FR2000/002757 WO2001027356A1 (fr) | 1999-10-11 | 2000-10-04 | Procédé de métallisation d'un substrat isolant par voie électrochimique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1228266A1 EP1228266A1 (fr) | 2002-08-07 |
EP1228266B1 true EP1228266B1 (fr) | 2004-02-04 |
Family
ID=9550779
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00966282A Expired - Lifetime EP1228266B1 (fr) | 1999-10-11 | 2000-10-04 | Procede de metallisation d'un substrat isolant par voie electrochimique |
Country Status (10)
Country | Link |
---|---|
US (1) | US6764586B1 (fr) |
EP (1) | EP1228266B1 (fr) |
JP (1) | JP4637429B2 (fr) |
AT (1) | ATE259006T1 (fr) |
AU (1) | AU7672900A (fr) |
CA (1) | CA2387109C (fr) |
DE (1) | DE60008134T2 (fr) |
ES (1) | ES2213047T3 (fr) |
FR (1) | FR2799475B1 (fr) |
WO (1) | WO2001027356A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2812723B1 (fr) * | 2000-08-01 | 2002-11-15 | Centre Nat Rech Scient | Capteur de molecules gazeuses reductrices |
DE10240921B4 (de) * | 2002-09-02 | 2007-12-13 | Qimonda Ag | Verfahren und Anordnung zum selektiven Metallisieren von 3-D-Strukturen |
US20170105287A1 (en) * | 2015-10-12 | 2017-04-13 | Tyco Electronics Corporation | Process of Producing Electronic Component and an Electronic Component |
US10184189B2 (en) | 2016-07-18 | 2019-01-22 | ECSI Fibrotools, Inc. | Apparatus and method of contact electroplating of isolated structures |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2596515A (en) * | 1946-03-14 | 1952-05-13 | Libbey Owens Ford Glass Co | Coating vitreous substances |
JP2829304B2 (ja) * | 1992-11-05 | 1998-11-25 | 誠 河瀬 | セラミック上へのZr合金めっき方法 |
FR2707673B1 (fr) * | 1993-07-16 | 1995-08-18 | Trefimetaux | Procédé de métallisation de substrats non-conducteurs. |
FR2746116B1 (fr) * | 1996-03-15 | 1998-06-05 | Galvanoplastie sous champ | |
US6572743B2 (en) * | 2001-08-23 | 2003-06-03 | 3M Innovative Properties Company | Electroplating assembly for metal plated optical fibers |
-
1999
- 1999-10-11 FR FR9912644A patent/FR2799475B1/fr not_active Expired - Lifetime
-
2000
- 2000-10-04 CA CA2387109A patent/CA2387109C/fr not_active Expired - Lifetime
- 2000-10-04 WO PCT/FR2000/002757 patent/WO2001027356A1/fr active IP Right Grant
- 2000-10-04 AU AU76729/00A patent/AU7672900A/en not_active Abandoned
- 2000-10-04 JP JP2001529484A patent/JP4637429B2/ja not_active Expired - Lifetime
- 2000-10-04 US US10/110,126 patent/US6764586B1/en not_active Expired - Lifetime
- 2000-10-04 DE DE60008134T patent/DE60008134T2/de not_active Expired - Lifetime
- 2000-10-04 ES ES00966282T patent/ES2213047T3/es not_active Expired - Lifetime
- 2000-10-04 EP EP00966282A patent/EP1228266B1/fr not_active Expired - Lifetime
- 2000-10-04 AT AT00966282T patent/ATE259006T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE60008134D1 (de) | 2004-03-11 |
EP1228266A1 (fr) | 2002-08-07 |
FR2799475B1 (fr) | 2002-02-01 |
AU7672900A (en) | 2001-04-23 |
FR2799475A1 (fr) | 2001-04-13 |
JP4637429B2 (ja) | 2011-02-23 |
JP2003511564A (ja) | 2003-03-25 |
CA2387109C (fr) | 2011-05-24 |
CA2387109A1 (fr) | 2001-04-19 |
ES2213047T3 (es) | 2004-08-16 |
US6764586B1 (en) | 2004-07-20 |
ATE259006T1 (de) | 2004-02-15 |
DE60008134T2 (de) | 2004-09-02 |
WO2001027356A1 (fr) | 2001-04-19 |
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