EP0897023A1 - Apparatus for transport of substrates, which are coated by electrodeposition - Google Patents

Apparatus for transport of substrates, which are coated by electrodeposition Download PDF

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Publication number
EP0897023A1
EP0897023A1 EP97810566A EP97810566A EP0897023A1 EP 0897023 A1 EP0897023 A1 EP 0897023A1 EP 97810566 A EP97810566 A EP 97810566A EP 97810566 A EP97810566 A EP 97810566A EP 0897023 A1 EP0897023 A1 EP 0897023A1
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EP
European Patent Office
Prior art keywords
branches
gripping elements
workpiece carriers
fact
gripping
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EP97810566A
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German (de)
French (fr)
Inventor
Eric Zwerner
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Suntec Trading AG
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Suntec Trading AG
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Priority to EP97810566A priority Critical patent/EP0897023A1/en
Publication of EP0897023A1 publication Critical patent/EP0897023A1/en
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/06—Suspending or supporting devices for articles to be coated

Definitions

  • the present invention relates to a device for transport of substrates to be coated by electrodeposition, comprising work carriers for said substrates to be coated arranged above a tank containing an electrolytic bath coating, guide means engaged with said workpiece carriers and drive means for moving said parts workpiece carriers along said guide means.
  • the substrates to be coated are generally present in the form of continuous bands, the width of which is vertically oriented and which are intended to form integrated circuit connection supports, better known as their denomination of "lead frames".
  • the means for gripping these bands are constituted by pliers arranged along the upper edge of these bands. Given this gripping mode, the bands are not coated at the location of the clamps, affecting their final appearance and giving a lower quality appearance, in the eyes of users.
  • the strip thus held and transported is supplied only on one side, so that the thickness of the coating has a gradient from one edge to the other of the strip.
  • the object of the present invention is to remedy, less in part, to the aforementioned drawbacks.
  • the subject of this invention is a device for transporting substrates to be coated by electrodeposition of the above type according to claim 1.
  • This transport device has several advantages important compared to the aforementioned devices of the state of the art.
  • the current is brought from two opposite sides of the substrate, providing a thicker coating regular.
  • the depth of immersion of the substrates in the bath electrolytic i.e. the machine zero point may vary between the top edge and the bottom edge of the parts to be as the position of the gripping elements may vary in height. It is indeed not only possible to vary the spacing between these gripping elements, but also to move them simultaneously without changing their spacing, thus modifying their height position and that of the substrate.
  • the plating machine 1 illustrated in FIG. 1 does not will not be described in detail, since this type of machine is well known to those skilled in the art and where only its transport device is part of the present invention.
  • the transport device associated with this machine 1 has two parallel conveyor chains 2, of the type bicycle chains, guided in two profiled slides 3, formed in a rail 4 integral with the frame of the machine 1.
  • These conveyor chains 2 are driven by means known (not shown) continuously or step by step depending on the plating process.
  • a plurality of workpieces 5, regularly spaced, are fixed along the conveyor chains 2.
  • Each workpiece holder 5, one of which is represented by the Figure 2 includes for this purpose a suspension member to quick coupling 6 which has the shape of a vertical element elongated cross section, U-shaped profile, the two parallel branches of which have two slots 7 L-shaped lying, engaged with two hooking pins 8 projecting laterally from a vertical support block 6a attached to conveyor chains 2.
  • This support block vertical 6a also has a roller 9 engaged with a track 10 provided on the upper face of the integral rail 4 machine frame 1.
  • the workpiece carriers 5 are thus guided and moved by compared to a series of electrolytic cells for coating total B ( Figure 1) arranged along the path of these workpieces and supplied with baths suitable for the plating operation to be performed on this machine 1.
  • the plating proper not part of this invention, so there is no need to describe further this part of the machine 1.
  • a vertical slide 11 is articulated to a dowel 12 fixed to the two parallel walls of the cross section U-shaped profile of the suspension member 6.
  • Two coplanar gripping elements 13 and 14 are mounted sliding on the vertical slide 11.
  • each gripping element 13, 14 has the shape of a U the two parallel branches of which are integral with a slide 15, respectively 16.
  • Each slide 15, 16 is arranged transversely to the vertical slide 11 and parallel to guide rail 4 and is mounted on the slide vertical 11 by two axial guides 15a, respectively 16a.
  • the vertical slide 11 also has a slot longitudinal 11a.
  • Two grooves 17, respectively 18, forming an actuating cam, are formed on the surface of a rail 23 secured to the machine frame 1.
  • Each slide 15, 16 is connected to one of the cam grooves 17, 18 by a feeler element 19, respectively 20.
  • This element probe 19, 20 is on the one hand in engagement with the groove 17, respectively 18 and crosses on the other hand, the longitudinal slot 11a of the slide 11.
  • a washer 19a, 20a, associated with a helical clamping spring 19b, 20b, takes pressing against the edge of the longitudinal slot 11a.
  • Strength of the helical clamping spring 19b, 20b is chosen for fix the vertical position of the slides 15 respectively 16 on the slide 11, while authorizing their movement by the connecting members 19, 20 engaged with the cams 17, respectively 18.
  • Two helical springs 21 are still arranged around of the two parallel branches of the gripping element 13. One end of these coil springs rests on an annular bearing surface 22 integral with each of the branches of the gripping member 13, while the other end bears against the slide 16 secured to the other gripping element 14. Thanks to these springs 21, the two gripping elements 13 and 14 are pressed elastically one towards the other, allowing to catch up the clearance between the cam grooves 17, 18 and the feeler elements 19, 20.
  • Each connecting branch 13a, 14a connecting the two parallel branches of the gripping elements 13, 14 in U-shaped is provided with positioning tabs 13b, respectively 14b, parallel to each other and whose planes respective are transverse to these respective connecting branches.
  • the respective edges of these positioning tabs 13b, 14b facing each other have a profile re-entering in V, allowing to position and hold with security a substrate S to be coated therebetween.
  • the parts of the gripping elements 13 and 14, respectively 13a and 14a, immersed in the solution are covered with non-conductive material (dielectric) to avoid electrolytic plating untimely on these.
  • a third horizontal groove 24, is provided in the plate 23.
  • a bar 25 fixed on the slide 11 is engaged with this horizontal groove 24.
  • the role of this horizontal groove is to prevent the tensions resulting from the movement of slides 15 and 16 on the slide 11 by the cams 17, 18 in engagement with the elements probes 19, respectively 20, do not affect the suspension member 6.
  • a wiper 26, integral with the vertical slide 11 is used to cooperate with a conductive track (not shown) integral with the frame of machine 1, to connect the elements gripping 13 and 14 at one of the terminals of a source of current (not shown) anodic or cathodic, while the other electrode (not shown), placed in the cell of electrolytic coating B or C is intended to be connected to the other terminal of the same source in order to perform the desired electrolytic deposit.
  • the vertical support block 6a is manufactured of a non-conductive material so as to serve as an insulator compared to conveyor chains 2.
  • the spacing between the two grooves 17, 18 can vary, making it possible to modify the spacing between the gripping elements 13 and 14.
  • This spacing can be increased when you want to load or discharge a substrate S.
  • This spacing is reduced when we want to hold the substrate S in order to transport it for subject it to a coating cycle on machine 1.
  • the vertical slide 11 is articulated around a peg 12 to the organ 6. This articulation is intended to allow to give a certain inclination to the slide 11 and therefore to the substrate S to be coated. This tilt is also used to facilitate the gravity positioning of the substrate S on a cache in case of selective deposit on this substrate.
  • An example in which the slide 11 and the substrate S are inclined in the coating cell C is illustrated by the figure 1.
  • connection 13a, 14a of the gripping elements used to tighten the substrates S are represented straight, it is obvious that these connecting branches 13a, 14a could have other shapes according to the profile of the substrates to be coated.

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  • 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)

Abstract

The apparatus includes carriers (5) for substrates (S) to be coated which are above an electrolytic plating bath, guideways (3, 4), and equipment (2) for displacing the carriers (5) along these guideways. The carriers (5) incorporate two gripping elements (13, 14) which face the opposing substrate edges, and can be moved relative to one another in the guide unit (11) using cam grooves (17, 18). These grooves also serve for positioning the gripping elements relative to the tanks containing the electrolytic coating liquid.

Description

La présente invention se rapporte à un dispositif de transport de substrats à revêtir par électrodéposition, comprenant des porte-pièces pour lesdits substrats à revêtir disposés au-dessus d'un bac contenant un bain électrolytique de revêtement, des moyens de guidage en prise avec lesdits porte-pièces et des moyens d'entraínement pour déplacer lesdits porte-pièces le long desdits moyens de guidage.The present invention relates to a device for transport of substrates to be coated by electrodeposition, comprising work carriers for said substrates to be coated arranged above a tank containing an electrolytic bath coating, guide means engaged with said workpiece carriers and drive means for moving said parts workpiece carriers along said guide means.

On connaít déjà des dispositifs de ce type dans lesquels les substrats à revêtir se présentent généralement sous la forme de bandes continues, dont la largeur est orientées verticalement et qui sont destinées à former des supports de connexion de circuits intégrés, plus connus sous leur dénomination de "lead frames". Dans ces dispositifs de transport, les moyens de préhension de ces bandes sont constitués par des pinces disposées le long du bord supérieur de ces bandes. Compte tenu de ce mode de préhension, les bandes ne sont pas revêtues à l'emplacement des pinces, nuisant à leur aspect final et donnant une apparence de moindre qualité, aux yeux des utilisateurs.We already know devices of this type in which the substrates to be coated are generally present in the form of continuous bands, the width of which is vertically oriented and which are intended to form integrated circuit connection supports, better known as their denomination of "lead frames". In these devices transport, the means for gripping these bands are constituted by pliers arranged along the upper edge of these bands. Given this gripping mode, the bands are not coated at the location of the clamps, affecting their final appearance and giving a lower quality appearance, in the eyes of users.

Cet inconvénient est cependant mineur. Par contre, ces dispositifs en présentent d'autres qui ont une importance beaucoup plus grande sur la qualité effective des revêtements obtenus. Parmi ceux-ci, on peut mentionner le fait que quand on entre dans le bain électrolytique, toute la bande est nécessairement au courant cathodique. De ce fait, lorsque la bande sort du bain électrolytique et que de l'électrolyte ruisselle à sa surface, le dépôt continue et forme des traínées de métal de plaquage, nuisant à la qualité de surface du revêtement. This disadvantage is however minor. However, these devices have others that matter much greater on the actual quality of the coatings obtained. Among these, we can mention the fact that when you enter the electrolytic bath, the whole band is necessarily cathodic aware. Therefore, when the strip comes out of the electrolytic bath and that of the electrolyte trickles to its surface, the deposit continues and forms plating metal streaks, adversely affecting the quality of coating surface.

La bande ainsi tenue et transportée n'est alimentée que par un côté, de sorte que l'épaisseur du revêtement présente un gradient d'un bord à l'autre de la bande.The strip thus held and transported is supplied only on one side, so that the thickness of the coating has a gradient from one edge to the other of the strip.

On peut encore signaler, parmi les inconvénients des dispositifs de transport selon l'état de la technique, qu'il n'est pas possible de régler la position du point zéro, c'est-à-dire la hauteur de la bande par rapport au bain électrolytique ou par rapport à l'anode constituant la source du métal de revêtement.We can also point out, among the disadvantages of transport devices according to the state of the art, which it is not possible to adjust the position of the zero point, that is to say the height of the strip relative to the bath electrolytic or relative to the anode constituting the source coating metal.

Le but de la présente invention est de remédier, au moins en partie, aux inconvénients susmentionnés.The object of the present invention is to remedy, less in part, to the aforementioned drawbacks.

A cet effet, cette invention a pour objet un dispositif de transport de substrats à revêtir par électrodéposition du type susmentionné, selon la revendication 1.To this end, the subject of this invention is a device for transporting substrates to be coated by electrodeposition of the above type according to claim 1.

Ce dispositif de transport présente plusieurs avantages importants par rapport aux dispositifs susmentionnés de l'état de la technique.This transport device has several advantages important compared to the aforementioned devices of the state of the art.

Aucune portion de la surface du substrat à transporter n'est masquée, de sorte que la totalité de sa surface peut être revêtue.No portion of the substrate surface to transport is not masked, so that its entire surface can be coated.

Le courant est amené depuis deux côtés opposés du substrat, permettant d'obtenir un revêtement d'épaisseur plus régulière.The current is brought from two opposite sides of the substrate, providing a thicker coating regular.

La profondeur d'immersion des substrats dans le bain électrolytique, c'est-à-dire le point zéro de la machine peut varier entre le bord haut et le bord bas des pièces à revêtir étant donné que la position des éléments de préhension peut varier en hauteur. Il est en effet non seulement possible de varier l'écartement entre ces éléments de préhension, mais aussi de les déplacer simultanément sans changer leur écartement, modifiant ainsi leur position en hauteur et celle du substrat. The depth of immersion of the substrates in the bath electrolytic, i.e. the machine zero point may vary between the top edge and the bottom edge of the parts to be as the position of the gripping elements may vary in height. It is indeed not only possible to vary the spacing between these gripping elements, but also to move them simultaneously without changing their spacing, thus modifying their height position and that of the substrate.

Le dessin annexé illustre, schématiquement et à titre d'exemple, une forme d'exécution du dispositif de transport objet de la présente invention.

  • La figure 1 est une vue en élévation en coupe transversale d'une installation de plaquage électrolytique munie du dispositif de transport objet de la présente invention;
  • La figure 2 est une vue partielle en perspective éclatée du dispositif de transport de la figure 1.
    • The appended drawing illustrates, schematically and by way of example, an embodiment of the transport device which is the subject of the present invention.
  • Figure 1 is an elevational view in cross section of an electroplating installation provided with the transport device object of the present invention;
  • FIG. 2 is a partial exploded perspective view of the transport device of FIG. 1.

    • La machine de plaquage 1 illustrée par la figure 1 ne sera pas décrite en détail, dans la mesure où ce type de machine est bien connu de l'homme du métier et où seul son dispositif de transport fait partie de la présente invention.The plating machine 1 illustrated in FIG. 1 does not will not be described in detail, since this type of machine is well known to those skilled in the art and where only its transport device is part of the present invention.

    Il s'agit d'une machine 1 dans laquelle les substrats S à revêtir sont transportés à travers de cellules de plaquage C, d'une entrée à une sortie en étant soumis à une suite d'opérations bien connue et qui ne fait pas partie de l'objet de la présente invention.It is a machine 1 in which the substrates S to be coated are transported through plating cells C, from entry to exit being subject to a sequence of operations well known and which is not part of the object of the present invention.

    Le dispositif de transport associé à cette machine 1 comporte deux chaínes transporteuses parallèles 2, du type chaínes de vélo, guidées dans deux glissières profilées 3, ménagées dans un rail 4 solidaires du bâti de la machine 1. Ces chaínes transporteuses 2 sont entraínées par des moyens connus (non représentés) en continu ou pas à pas suivant le processus de plaquage. Une pluralité de porte-pièces 5, régulièrement espacés, sont fixés le long des chaínes transporteuses 2.The transport device associated with this machine 1 has two parallel conveyor chains 2, of the type bicycle chains, guided in two profiled slides 3, formed in a rail 4 integral with the frame of the machine 1. These conveyor chains 2 are driven by means known (not shown) continuously or step by step depending on the plating process. A plurality of workpieces 5, regularly spaced, are fixed along the conveyor chains 2.

    Chaque porte-pièce 5, dont un est représenté par la figure 2, comporte à cet effet un organe de suspension à accrochage rapide 6 qui présente la forme d'un élément vertical allongé à section transversale, profilé en forme de U, dont les deux branches parallèles comportent deux fentes 7 en forme de L couché, en prise avec deux chevilles d'accrochage 8 faisant saillie latéralement d'un bloc support vertical 6a fixé aux chaínes transporteuses 2. Ce bloc support vertical 6a comporte encore un galet 9 en prise avec une piste 10 ménagée sur la face supérieure du rail 4 solidaire du bâti de la machine 1.Each workpiece holder 5, one of which is represented by the Figure 2, includes for this purpose a suspension member to quick coupling 6 which has the shape of a vertical element elongated cross section, U-shaped profile, the two parallel branches of which have two slots 7 L-shaped lying, engaged with two hooking pins 8 projecting laterally from a vertical support block 6a attached to conveyor chains 2. This support block vertical 6a also has a roller 9 engaged with a track 10 provided on the upper face of the integral rail 4 machine frame 1.

    Les porte-pièces 5 sont ainsi guidés et déplacés par rapport à une série de cellules électrolytiques pour revêtement total B (figure 1) disposées le long de la trajectoire de ces porte-pièces et alimentées en bains appropriés à l'opération de plaquage à effectuer sur cette machine 1. Le plaquage proprement dit ne faisant pas partie de la présente invention, il n'est donc pas utile de décrire davantage cette partie de la machine 1.The workpiece carriers 5 are thus guided and moved by compared to a series of electrolytic cells for coating total B (Figure 1) arranged along the path of these workpieces and supplied with baths suitable for the plating operation to be performed on this machine 1. The plating proper, not part of this invention, so there is no need to describe further this part of the machine 1.

    Une glissière verticale 11 est articulée à une cheville 12 fixée aux deux parois parallèles de la section transversale profilée en forme de U de l'organe de suspension 6. Deux éléments de préhension coplanaires 13 et 14 sont montés coulissants sur la glissière verticale 11. A cet effet, chaque élément de préhension 13, 14 présente la forme d'un U dont les deux branches parallèles sont solidaires d'une coulisse 15, respectivement 16. Chaque coulisse 15, 16 est disposée transversalement à la glissière verticale 11 et parallèlement au rail de guidage 4 et est montée sur la glissière verticale 11 par deux guides axiaux 15a, respectivement 16a.A vertical slide 11 is articulated to a dowel 12 fixed to the two parallel walls of the cross section U-shaped profile of the suspension member 6. Two coplanar gripping elements 13 and 14 are mounted sliding on the vertical slide 11. For this purpose, each gripping element 13, 14 has the shape of a U the two parallel branches of which are integral with a slide 15, respectively 16. Each slide 15, 16 is arranged transversely to the vertical slide 11 and parallel to guide rail 4 and is mounted on the slide vertical 11 by two axial guides 15a, respectively 16a.

    La glissière verticale 11 comporte encore une fente longitudinale 11a. Deux rainures 17, respectivement 18, formant came d'actionnement, sont ménagées à la surface d'un rail 23 solidaire du bâti de la machine 1. Chaque glissière 15, 16 est reliée à une des rainures formant cames 17, 18 par un élément palpeur 19, respectivement 20. Cet élément palpeur 19, 20 est d'une part en prise avec la rainure 17, respectivement 18 et traverse d'autre part, la fente longitudinale 11a de la glissière 11. Une rondelle 19a, 20a, associée à un ressort de serrage hélicoïdal 19b, 20b, prend appui contre le bord de la fente longitudinale 11a. La force du ressort de serrage hélicoïdal 19b, 20b est choisie pour fixer la position verticale des coulisses 15 respectivement 16 sur la glissière 11, tout en autorisant leur déplacement par les organes de liaison 19, 20 en prise avec les cames 17, respectivement 18.The vertical slide 11 also has a slot longitudinal 11a. Two grooves 17, respectively 18, forming an actuating cam, are formed on the surface of a rail 23 secured to the machine frame 1. Each slide 15, 16 is connected to one of the cam grooves 17, 18 by a feeler element 19, respectively 20. This element probe 19, 20 is on the one hand in engagement with the groove 17, respectively 18 and crosses on the other hand, the longitudinal slot 11a of the slide 11. A washer 19a, 20a, associated with a helical clamping spring 19b, 20b, takes pressing against the edge of the longitudinal slot 11a. Strength of the helical clamping spring 19b, 20b is chosen for fix the vertical position of the slides 15 respectively 16 on the slide 11, while authorizing their movement by the connecting members 19, 20 engaged with the cams 17, respectively 18.

    Deux ressorts hélicoïdaux 21 sont encore disposés autour des deux branches parallèles de l'élément de préhension 13. Une extrémité de ces ressorts hélicoïdaux s'appuie sur une portée annulaire 22 solidaire de chacune des branches parallèles de l'élément de préhension 13, tandis que l'autre extrémité s'appuie contre la coulisse 16 solidaire de l'autre élément de préhension 14. Grâce à ces ressorts 21, les deux éléments de préhension 13 et 14 sont pressés élastiquement l'un en direction de l'autre, permettant de rattraper le jeu entre les rainures formant cames 17, 18 et les éléments palpeurs 19, 20.Two helical springs 21 are still arranged around of the two parallel branches of the gripping element 13. One end of these coil springs rests on an annular bearing surface 22 integral with each of the branches of the gripping member 13, while the other end bears against the slide 16 secured to the other gripping element 14. Thanks to these springs 21, the two gripping elements 13 and 14 are pressed elastically one towards the other, allowing to catch up the clearance between the cam grooves 17, 18 and the feeler elements 19, 20.

    Chaque branche de liaison 13a, 14a reliant les deux branches parallèles des éléments de préhension 13, 14 en forme de U, est pourvue de languettes de positionnement 13b, respectivement 14b, parallèles entre elles et dont les plans respectifs sont transversaux à ces branches de liaison respectives. Les bords respectifs de ces languettes de positionnement 13b, 14b se faisant face, présentent un profil rentrant en V, permettant de positionner et de tenir avec sécurité un substrat S à revêtir entre elles. A l'exception des bords respectifs en forme de V rentrant se faisant face des languettes de positionnement 13b et 14b, les parties des éléments de préhension 13 et 14, respectivement 13a et 14a, immergées dans la solution, sont recouvertes de matière non-conductrice (diélectrique) afin d'éviter tout placage électrolytique intempestif sur ceux-ci.Each connecting branch 13a, 14a connecting the two parallel branches of the gripping elements 13, 14 in U-shaped, is provided with positioning tabs 13b, respectively 14b, parallel to each other and whose planes respective are transverse to these respective connecting branches. The respective edges of these positioning tabs 13b, 14b facing each other, have a profile re-entering in V, allowing to position and hold with security a substrate S to be coated therebetween. Except respective inward V-shaped edges facing each other positioning tabs 13b and 14b, the parts of the gripping elements 13 and 14, respectively 13a and 14a, immersed in the solution, are covered with non-conductive material (dielectric) to avoid electrolytic plating untimely on these.

    Grâce à ce mode de préhension des substrats plats S, aucune portion de leurs deux faces ne se trouve masquée, de sorte que le revêtement peut s'étendre sur la totalité des deux faces de ce substrat S.Thanks to this method of gripping flat substrates S, no portion of their two faces is hidden, so that the coating can extend over all of the two faces of this substrate S.

    De préférence, une troisième rainure horizontale 24, est ménagée dans la plaque 23. Une barrette 25 fixées sur la glissière 11 est en prise avec cette rainure horizontale 24. Le rôle de cette rainure horizontale est d'éviter que les tensions résultant du déplacement des coulisses 15 et 16 sur la glissière 11 par les cames 17, 18 en prise avec les éléments palpeurs 19, respectivement 20, ne se répercutent sur l'organe de suspension 6.Preferably, a third horizontal groove 24, is provided in the plate 23. A bar 25 fixed on the slide 11 is engaged with this horizontal groove 24. The role of this horizontal groove is to prevent the tensions resulting from the movement of slides 15 and 16 on the slide 11 by the cams 17, 18 in engagement with the elements probes 19, respectively 20, do not affect the suspension member 6.

    Un frotteur 26, solidaire de la glissière verticale 11 sert à coopérer avec une piste conductrice (non représentée) solidaire du bâti de la machine 1, pour relier les éléments de préhension 13 et 14 à l'une des bornes d'une source de courant (non représentée) anodique ou cathodique, alors que l'autre électrode (non représentée), disposée dans la cellule de revêtement électrolytique B ou C est destinée à être reliée à l'autre borne de la même source en vue d'effectuer le dépôt électrolytique désiré. Celui-ci ne faisant pas partie de la présente invention, il n'est donc pas nécessaire de le décrire ici. Le bloc support vertical 6a est fabriqué en une matière non-conductrice de façon à servir d'isolateur par rapport aux chaínes transporteuses 2.A wiper 26, integral with the vertical slide 11 is used to cooperate with a conductive track (not shown) integral with the frame of machine 1, to connect the elements gripping 13 and 14 at one of the terminals of a source of current (not shown) anodic or cathodic, while the other electrode (not shown), placed in the cell of electrolytic coating B or C is intended to be connected to the other terminal of the same source in order to perform the desired electrolytic deposit. This one not being part of the present invention, therefore it is not necessary to describe it here. The vertical support block 6a is manufactured of a non-conductive material so as to serve as an insulator compared to conveyor chains 2.

    Comme on le voit sur la figure 2, l'écartement entre les deux rainures 17, 18 peut varier, permettant de modifier l'écartement entre les éléments de préhension 13 et 14. Cet écartement peut être augmenté lorsque l'on désire charger ou décharger un substrat S. Cet écartement est réduit lorsque l'on veut tenir le substrat S en vue de le transporter pour le soumettre à un cycle de revêtement sur la machine 1. Compte tenu des ressorts 21 interposés entre les deux éléments de préhension 13 et 14, il est possible de choisir l'écartement entre ces éléments de préhension 13 et 14 légèrement inférieur à la largeur du substrat S à tenir, de manière à exercer une certaine force élastique de serrage sur les bords du substrat S.As seen in Figure 2, the spacing between the two grooves 17, 18 can vary, making it possible to modify the spacing between the gripping elements 13 and 14. This spacing can be increased when you want to load or discharge a substrate S. This spacing is reduced when we want to hold the substrate S in order to transport it for subject it to a coating cycle on machine 1. Given the springs 21 interposed between the two gripping elements 13 and 14, it is possible to choose the spacing between these gripping elements 13 and 14 slightly less than the width of the substrate S to be held, so as to exert a certain elastic clamping force on the edges of the substrate S.

    On peut aussi, grâce à ces rainures 17, 18 déterminer la position zéro, ou en d'autres termes, la position en hauteur du substrat S dans la cellule C de revêtement électrolytique sélectif. Cette possibilité présente un intérêt surtout lorsque l'on désire effectuer un dépôt sélectif à la surface du substrat S. Dans ce cas, grâce à la commande de la position en hauteur du substrat S par les rainures 17, 18, il est possible de centrer la portion de surface du substrat S à revêtir par rapport à un masque destiné au revêtement sélectif de sa surface.We can also, thanks to these grooves 17, 18 determine the zero position, or in other words, the height position of substrate S in cell C of electrolytic coating selective. This possibility is of particular interest when you wish to make a selective deposit at the surface of the substrate S. In this case, thanks to the command of the height position of the substrate S by the grooves 17, 18, it is possible to center the surface portion of the substrate S to be coated with respect to a mask intended for coating selective of its surface.

    Comme on l'a mentionné précédemment, la glissière verticale 11 est articulée autour d'une cheville 12 à l'organe de suspension 6. Cette articulation a pour but de permettre de donner une certaine inclinaison à la glissière 11 et donc au substrat S à revêtir. Cette inclinaison sert également à faciliter le positionnement par gravité du substrat S sur un cache en cas de dépôt sélectif sur ce substrat. Un exemple dans lequel la glissière 11 et le substrat S sont inclinés dans la cellule de revêtement C est illustré par la figure 1.As mentioned earlier, the vertical slide 11 is articulated around a peg 12 to the organ 6. This articulation is intended to allow to give a certain inclination to the slide 11 and therefore to the substrate S to be coated. This tilt is also used to facilitate the gravity positioning of the substrate S on a cache in case of selective deposit on this substrate. An example in which the slide 11 and the substrate S are inclined in the coating cell C is illustrated by the figure 1.

    Bien que dans l'exemple décrit les deux branches de liaison 13a, 14a des éléments de préhension servant à serrer les substrats S soient représentées droites, il est évident que ces branches de liaison 13a, 14a pourraient avoir d'autres formes en fonction du profil des substrats à revêtir.Although in the example describes the two branches of connection 13a, 14a of the gripping elements used to tighten the substrates S are represented straight, it is obvious that these connecting branches 13a, 14a could have other shapes according to the profile of the substrates to be coated.

    Claims (7)

    Dispositif de transport de substrats à revêtir par électrodéposition, comprenant des porte-pièces (5) pour lesdits substrats (S) à revêtir disposés au-dessus de cellules (C) contenant un bain électrolytique de revêtement, des moyens de guidage (3, 4) en prise avec lesdits porte-pièces (5) et des moyens d'entraínement (2) pour déplacer lesdits porte-pièces (5) le long desdits moyens de guidage (3, 4), caractérisé par le fait que lesdits porte-pièces (5) comportent deux éléments de préhension (13, 14) situés le long de deux bords opposés de chacun desdits substrats, mobiles l'un par rapport à l'autre, chacun de ces éléments de préhension (13, 14) étant en prise, d'une part, avec des moyens de guidage (11) et, d'autre part, avec une came fixe (17, 18), disposée dans la trajectoire décrite par lesdits porte-pièces (5) en prise avec lesdits moyens de guidage (3, 4), pour définir d'une part, l'écartement entre lesdits éléments de préhension (13, 14) et, d'autre part, la position de ces éléments de préhension (13, 14) par rapport à ladite cellule (C) en fonction de la position desdits porte-pièces (5) le long de ladite trajectoire.Device for transporting substrates to be coated by electroplating, comprising workpieces (5) therefor substrates (S) to be coated arranged above cells (C) containing an electrolytic coating bath, guide means (3, 4) engaged with said workpiece carriers (5) and drive means (2) for moving the said workpiece carriers (5) along said guide means (3, 4), characterized by the fact that said workpiece carriers (5) comprise two gripping elements (13, 14) located along two opposite edges of each of said substrates, movable one relative to each other, each of these gripping elements (13, 14) being engaged, on the one hand, with guide means (11) and, on the other hand, with a fixed cam (17, 18), arranged in the path described by said workpiece carriers (5) engaged with said guide means (3, 4), to define on the one hand, the spacing between said elements gripping (13, 14) and, on the other hand, the position of these gripping elements (13, 14) relative to said cell (C) depending on the position of said workpiece carriers (5) the along said trajectory. Dispositif selon la revendication 1, caractérisé par le fait que lesdits éléments de préhension (13, 14) présentent la forme de U coplanaires avec les branches homologues parallèles, la partie de préhension de ces éléments étant formée par les branches (13a, 14a) reliant leurs branches parallèles respectives.Device according to claim 1, characterized by the fact that said gripping elements (13, 14) have the U-shape coplanar with the homologous branches parallel, the grip part of these elements being formed by the branches (13a, 14a) connecting their branches respective parallels. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que chacune desdites branches (13a, 14a) formant la partie de préhension est solidaire de languettes de positionnement (13b, 14b) disposées transversalement à ces branches et dont les bords respectifs se faisant face présentent un profil rentrant en forme de V. Device according to one of the preceding claims, characterized in that each of said branches (13a, 14a) forming the gripping part is integral with positioning tabs (13b, 14b) arranged transversely to these branches and whose respective edges being face have a V-shaped profile. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que lesdits éléments de préhension (13, 14) sont reliés par des moyens élastiques tendant à serrer élastiquement entre eux ledit substrat (S).Device according to one of the preceding claims, characterized by the fact that said gripping elements (13, 14) are connected by elastic means tending to resiliently clamp said substrate (S) therebetween. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que lesdits porte-pièces (5) comportent un élément de suspension (6) comprenant un axe (12) parallèle audits moyens de guidage (3, 4) auquel est articulé une glissière (11) sur laquelle sont montées deux coulisses (15, 16) chacune solidaire de deux branches parallèles de l'un des éléments de préhension en forme de U.Device according to one of the preceding claims, characterized by the fact that said workpiece carriers (5) have a suspension element (6) comprising an axis (12) parallel audits means of guidance (3, 4) which is articulated a slide (11) on which are mounted two slides (15, 16) each secured to two parallel branches of one of the U-shaped gripping elements. Dispositif selon la revendications 5, caractérisé par le fait que ladite glissière (11) est solidaire d'un élément (25) en prise avec une troisième came fixe (24) disposée le long de la trajectoire décrite par lesdits porte-pièces (5).Device according to claim 5, characterized by the fact that said slide (11) is integral with a element (25) engaged with a third fixed cam (24) arranged along the path described by said workpiece carriers (5). Dispositif selon la revendication 6, caractérisé par le fait que ladite troisième came fixe (24) est horizontale.Device according to claim 6, characterized by the fact that said third fixed cam (24) is horizontal.
    EP97810566A 1997-08-14 1997-08-14 Apparatus for transport of substrates, which are coated by electrodeposition Withdrawn EP0897023A1 (en)

    Priority Applications (1)

    Application Number Priority Date Filing Date Title
    EP97810566A EP0897023A1 (en) 1997-08-14 1997-08-14 Apparatus for transport of substrates, which are coated by electrodeposition

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP97810566A EP0897023A1 (en) 1997-08-14 1997-08-14 Apparatus for transport of substrates, which are coated by electrodeposition

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    EP0897023A1 true EP0897023A1 (en) 1999-02-17

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    Citations (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP0637640A2 (en) * 1989-05-19 1995-02-08 Sun Industrial Coatings Private Limited Plating system

    Patent Citations (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP0637640A2 (en) * 1989-05-19 1995-02-08 Sun Industrial Coatings Private Limited Plating system

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