EP0897023A1 - Gegenstand für das Transportieren von mittels Elektroplattierung zu beschichten Substraten - Google Patents

Gegenstand für das Transportieren von mittels Elektroplattierung zu beschichten Substraten 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
Authority
EP
European Patent Office
Prior art keywords
branches
gripping elements
workpiece carriers
fact
gripping
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.)
Withdrawn
Application number
EP97810566A
Other languages
English (en)
French (fr)
Inventor
Eric Zwerner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suntec Trading AG
Original Assignee
Suntec Trading AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suntec Trading AG filed Critical Suntec Trading AG
Priority to EP97810566A priority Critical patent/EP0897023A1/de
Publication of EP0897023A1 publication Critical patent/EP0897023A1/de
Withdrawn legal-status Critical Current

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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
    • 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)
EP97810566A 1997-08-14 1997-08-14 Gegenstand für das Transportieren von mittels Elektroplattierung zu beschichten Substraten Withdrawn EP0897023A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97810566A EP0897023A1 (de) 1997-08-14 1997-08-14 Gegenstand für das Transportieren von mittels Elektroplattierung zu beschichten Substraten

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97810566A EP0897023A1 (de) 1997-08-14 1997-08-14 Gegenstand für das Transportieren von mittels Elektroplattierung zu beschichten Substraten

Publications (1)

Publication Number Publication Date
EP0897023A1 true EP0897023A1 (de) 1999-02-17

Family

ID=8230339

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97810566A Withdrawn EP0897023A1 (de) 1997-08-14 1997-08-14 Gegenstand für das Transportieren von mittels Elektroplattierung zu beschichten Substraten

Country Status (1)

Country Link
EP (1) EP0897023A1 (de)

Citations (1)

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

Patent Citations (1)

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

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