Classifications

• • 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
  • H05K3/0085—Apparatus for treatments of printed circuits with liquids not provided for in groups H05K3/02 - H05K3/46; conveyors and holding means therefor
  • H05K3/0088—Apparatus for treatments of printed circuits with liquids not provided for in groups H05K3/02 - H05K3/46; conveyors and holding means therefor for treatment of holes
• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
  • C25D21/00—Processes for servicing or operating cells for electrolytic coating
  • C25D21/10—Agitating of electrolytes; Moving of racks
• • 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
  • C25D5/20—Electroplating using ultrasonics, vibrations

Definitions

• Method for moving a product having bores during its wet chemical treatment e.g. galvanization, and device for carrying out the method
• the invention first relates to a method according to the preamble of claim 1. So far, one has proceeded so that during the stay of the goods to be treated in the treatment station (bath) by rods guided on the bath container via the goods carriers, the goods perpendicular to the goods plane with a stroke length of 2x10 to 2x40 mm and a frequency of about 20 double strokes / mi ⁇ . was moved back and forth. With this "movement of goods" the bores of the goods, in particular plate-shaped goods such as printed circuit boards, were to be cleaned of residues and, in particular, of gas bubbles formed therein due to the chemical treatment.
• DE-OS 31 95 313 only shows a vibration to detach gas bubbles adhering to the surface of plates to be galvanized. This reference, however, gives no indication that vibrations in the direction of the longitudinal axes of the bores of these plates ensure that the electrolyte liquid passes through the bores in accordance with the invention described below.
• the object or problem of the invention is first of all to improve procedural measures according to the preamble of claim 1 in such a way that, in particular when the ratio of the plate thickness to the bore diameter is unfavorable for removing residues and gas bubbles from the bores, (eg with an aspect ratio 8: 1), surely any residues and / or Gas bubbles are removed.
• the treatment of printed circuit boards with holes is known, which is known by the abbreviation HARB (_High Aspect atio B_oards).
• HARB “High Aspect atio B_oards
• the angle between the longitudinal axis of the bores of the material and the shaking direction is constantly changed. This promotes the removal of gas bubbles from the holes. In addition, this promotes the exchange of treatment liquid between plate-shaped parts to be treated which are arranged at a distance from one another, which in turn results in further promotion of the exchange of treatment liquid in the bores.
• the aforementioned advantages and effects can also be achieved by means of a method according to saying 3 reachable. The incline can be selected differently depending on the desired result.
• the buoyancy of the gas bubbles within the liquid can be utilized to the maximum and thereby a particularly easy separation of the gas bubbles from the walls of the holes.
• the measure according to claim 4 also facilitates detachment of the gas bubbles from the relevant surfaces or walls of the goods.
• claims 8 and 9 include the combination of the vibrations according to the invention with the slow back and forth movement ("movement of goods") of e.g. 20 double strokes / min. and a correspondingly large amplitude of e.g. 2x10 - 2x40 mm, which is known from the prior art.
• the invention further aims to solve the problem or problem of creating an arrangement for carrying out the method according to one or more of the claims 1 to 9 already explained, whereby, while avoiding the disadvantages of the explained prior art, a transfer of such Vibrations on the stationary part of such a system, especially the bath tank, should be largely avoided.
• the vibration generator has the consequence, in accordance with the method explained at the outset, that the vibrations of which almost exclusively reach the material to be treated, but are not or only slightly passed on to the stationary part of the system, in particular the container.
• the main direction of the vibrations produced by the vibration generator runs in the direction of the bores of the material to be treated, ie the vibration generator is positioned with respect to the receiving or carrying means of the material so that it is in the direction the longitudinal axis bores of the material vibrate.
• a direction of oscillation is also possible which takes a certain angle with the longitudinal axis of the bores, for example when using the corresponding procedural measure, which have already been discussed above, including a constant change in the position of the bores by rotating the material
• the vibration generators can be provided at different points between the goods carrier and the goods, e.g. also on the support rod of a basket receiving the good parts, on support frames, on the
• FIG. 2 a partial representation in a view according to arrow II in FIG. 1, 6
• FIG. 3 a view in the direction of arrow III in FIG. 2,
• FIG. 8 shows another embodiment of the Erfin-making in the form of a supporting bar or a supporting frame with means for the rod A ⁇ bri ⁇ - 0 supply of plates in an inclined position
• FIG. 9 a detail of FIG. 6 in a perspective view and with the omission of the printed circuit boards
• FIG. 1 shows the container 1 of a treatment station 2 through which the material 3 to be treated, here printed circuit boards provided with holes, is carried out in the transport direction 4 hi ⁇ .
• the aforementioned bores are not shown for drawing reasons. Their longitudinal axes run according to number 5.
• the ratio of the thickness of the plates 3 to the bore diameter is preferably greater than 8: 1.
• a plurality of treatment stations 2 are generally arranged one behind the other in the transport and processing direction 4.
• the treatment liquid (this can also be a rinsing liquid) is indicated by number 6.
• Goods carriers 7 are provided which (see also FIGS. 2 to 4) consist of a goods carrier rail 8 and support arms 9 holding these. At the upper Abwi ⁇ klunge ⁇ 9 * of the support arms 9 engages a lifting device 10 (indicated here only by dash-dotted lines), which lifts the support arms 9 with their fork-shaped ends 9 "from a so-called instruction 11 of the container and also pulls the material to be treated out of the bath, transported to the next station, lowered there and so on. While the material to be treated is in the bathroom (see FIGS. 1 to 5 and 8, 9), vibratory generators are active, which are numbered 12 throughout.
• the vibration generators 12 generate vibration vibrations in the direction of the double arrow 13. This vibration direction runs essentially horizontally.
• the Schwi ⁇ gu ⁇ gsgenerator 12 are attached to the goods carrier Schie ⁇ e ⁇ 8 in this example.
• This exemplary embodiment also shows (see FIGS. 2 and 4) that a plurality of vibration generators, here two vibration generators 12, are provided at a distance from one another on each goods carrier rail 8. This can create an even shaking effect can be reached over the entire length of the respective goods carrier rail 8. If necessary, more than two vibration generators can be attached to the product carrier rail, if necessary.
• Appropriate means are provided to keep the vibrating vibrations generated by the invention completely or at least largely away from the stationary part of the system.
• This can e.g. can be achieved in such a way that the goods carrier rail 8 is very elastic in the shaking direction 13, e.g. 1 has the thin cross section to be seen in particular.
• This thin cross-section, with its long side perpendicular to the direction of vibration 13, can thus yield slightly elastically and elastically in the direction of vibration.
• a further possible embodiment for keeping the aforementioned vibrations away from the stationary part of the system would be e.g. elastic bearings 27 of the instructions 11 on the rods 17 explained in more detail below.
• the vibrators are preferred using a indicated electric motor 16 driven.
• the current transmission takes place with the help of contacts, which are shown in more detail in FIGS. 5 and 6, and which are closed when the fork-like ends 8 'are gripped by the respective instruction 11.
• 5 shows the goods carrier 7, which is lowered into the treatment station 2 according to the arrows 27.
• An upper contact part 28 is provided on the support arm 9 of the goods carrier and an associated lower contact part 29 is provided at the treatment station 2.
• the contacts 28, 29 abut one another.
• the current is then supplied to the electric drives 16 of the vibrating generators.
• This closing of the contacts and thus the start-up of the vibration generator 12 thus takes place automatically after the good has been introduced into the bath 6.
• the aforementioned contacts are then automatically opened again.
• the same contact arrangement can be provided if an electromagnetic vibration generator is provided instead of an electric motor. Vibration generation would, however, also be possible by non-electrical means, for example by means of compressed air.
• vibration generators which each achieve acceleration values of different strengths and act alternately in different directions (not shown in the drawing).
• a magnet can attract the goods carrier rail 8 or the like in one direction, while after the magnet is switched off by a spring, the goods carrier rail can be moved back again, whereupon the magnet then operates again, etc.
• the size of the unbalance of a vibration generator and its frequency can be adapted to the respective conditions or requirements. As already mentioned, continuous or discontinuous changes in the vibration frequency are also possible, the latter also by repeatedly switching the vibration generator on and off.
• adjusting rods 17 are provided for this purpose, which are moved back and forth in the longitudinal direction by a device (not shown) in the aforementioned sense in the direction of the double arrows 13 , namely relative to the container 1. With the rods 17, the instructions 11 are firmly connected and therefore transfer their movement to the good 3rd
• the exemplary embodiment in FIG. 7 shows a goods carrier rail 8 with support arms 9 and a support rod 18 which hangs on the goods carrier rail 8 and holds a basket 20 via a carrier 19 which holds a stack of plate-like goods 3 to be treated 3 serves.
• the plates preferably also the above-mentioned circuit boards, are at a certain distance from one another so that the treatment liquid can flow between the plates.
• the Schwingu ⁇ gsgenerator 12 with drive 16 is attached to the support rod 18.
• the configurations and possibilities that were described with reference to FIGS. 1 to 4 can also be used here analogously. Basically, therefore, the construction, applications and procedural measures explained in one of the exemplary embodiments can also be provided in one of the other exemplary embodiments.
• the basket 20 can be rotated about an axis of rotation, here a horizontally extending axis of rotation 21, in the direction of one or both arrows 22, 23, or can also be pivoted back and forth.
• the movement of the plates 3 achieved in this way is superimposed on the vibration by the vibration generator 12, which here too mainly takes place in the direction of the double arrow 13.
• This is achieved in particular by the fact that, with the aforementioned turning or pivoting, the holes in the plates do not always run horizontally, but periodically also obliquely or perpendicularly to the horizontal.
• FIG. 8 shows a possible inclined position of the goods (here also plates 3) which are held by brackets 25 of the carrying frame 14 by slots 24 which run correspondingly obliquely to the vertical.
• the plates are inserted with their lateral edges into the slots 24; if necessary also secured by clamping screws or the like.
• FIG. 8, in particular also FIG. 9, show that in this exemplary embodiment three holding brackets 25 lying one above the other are provided with slots 24, 24 'and 24 ", the direction of which extends obliquely to the longitudinal axis of the supporting frame 14 and which are offset in this way on the holders 25 are provided that these slots are aligned with one another and can accommodate the edge of a plate 3.
• FIG. 10 shows a different variant, in which the plates 3 have an inclined position which forms an acute angle with the direction of vibration 13. This facilitates a flow through and thus exchange of the treatment liquid in the spaces 26 between the plates.
• the inclined positions according to FIGS. 8, 9 on the one hand and FIG. 10 on the other hand can also be provided in combination.
• Vibration generator 12 namely between two supporting frames 14 which hang on the goods carrier rail 8.
• the vibration generator 12 is designed so that its main vibration is perpendicular to the plane of the drawing in FIG. 11. Plates to be treated are numbered 3.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Electrochemistry (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Manufacturing & Machinery (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Electroplating Methods And Accessories (AREA)
• Cleaning By Liquid Or Steam (AREA)
• Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
• Coating With Molten Metal (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6409800

Family Applications (1)

Country Status (6)

Cited By (4)

Families Citing this family (7)

Citations (3)

Family Cites Families (3)

• 1990
  • 1990-07-06 DE DE4021581A patent/DE4021581A1/de active Granted
• 1991
  • 1991-07-04 WO PCT/DE1991/000557 patent/WO1992001088A1/de not_active Application Discontinuation
  • 1991-07-04 CA CA002086762A patent/CA2086762A1/en not_active Abandoned
  • 1991-07-04 KR KR1019930700020A patent/KR930701641A/ko not_active Ceased
  • 1991-07-04 JP JP91511324A patent/JPH05508744A/ja active Pending
  • 1991-07-04 EP EP91911680A patent/EP0539390A1/de not_active Withdrawn

Patent Citations (3)

Non-Patent Citations (2)

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