DE2232995C3 - Device for the selective electroplating of reticulated parts - Google Patents

Description

The invention relates to a device /.um selective electroplating of reticulated parts, with one channel for supply and one channel for drainage of the electrolyte.

Such a device is from US-PS Jl 62,589 known. In this case, the inlet and outlet channels are for The flexrolls are arranged concentrically to one another and brought up to the part to be electroplated on one side. The known device is to electroplate parts with a closed surface provided: however, parts with mi! reticulated Surface to be galvanized. However, the / u gakanisicrcndc devilish cannot be precisely determined, because the electrolyte through the reticulated surface hi ml u π hui π and thus the surface to be electroplated on the side of the river facing away from the canals Partly cannot be precisely determined.

This leads to unnecessarily high material losses, which are correspondingly costly in the case of expensive materials. For example When assembling integrated circuits, the crystal must be welded together with the circuit and / was on the gilded surface of the rectangular frame, its mesh surface is about 40 times larger than would be required / by welding the crystal.

The invention is therefore based on the object of providing a device for selective electroplating of to create reticulated files with which they can be electroplated selectively and / or on both sides.

This object is achieved by the measures covered by patent claim I.

The device according to the invention not only has the advantage that with it reticulated parts the same / in a hurry can be galvanized on both sides. In addition, since the supply channel is coaxial / to the discharge channel can be arranged, the minimal layerable [- "laugh can be kept much smaller. Well-known device encloses namely tier drainage channel the supply channel. so that the minimum coatable surface in the known device is more than 4 times larger than al ·. in the invention.

Preferred developments and configurations of the device according to the invention are the subject matter of the dependent claims 2 and 3.

With complete coating of the frames of integrated circuits, an average of 80 g Consumed gold for 1000 frames, millions of which are produced. By the device according to the invention the consumption of gold can be reduced by up to b g of gold per 1000 frames. As a result the gold savings for only 10 million devices produced is 740 kg gold, which is at an invoice price of 1,500 rubles per 1 kg of gold represents a saving of 1,110,000 rubles.

The invention is explained in more detail using the exemplary embodiment shown in the drawing indicates

F i g. 1 shows the perspective view, partially cut away, of a device for selective electroplating of reticulated parts and

F i g. 2 the front view of several locally coated reticulated parts.

The device for the selective electroplating of flat retzi-shaped parts consists of a main container, here a bath 1 (Fig. 1). a pump 2. an intermediate container 3 with a filer 4 and a working member 5 for coating the parts.

The working member 5 for coating the parts is arranged separately from the main container and in shape a job cartridge, which consists of a Body 6 with a transfer channel 7 and a star of several supply channels 8 (FIG. 1 shows one Channel). In the lower area of the Zuleiiungskana-Ie 8 nozzles are installed, which consist of nozzles 9. Intermediate layers 10, seals Il and nuts 12 are made. the The lower part of the cassette is designed as a movable pressure strip 1} on which the lower sealing washer !!

14. movable bushings 15 and compensating nozzles lh are mounted.

Between the sealing washer 14 and the seal Il a part 17 is pressed in, which has a flat mesh surface has (Fig. 2).

The local coating of flat nets / parts is carried out as follows. The Elekirolu turns out the bath 1 with the help of a pump 2 in an intermediate container 3, in which the anode 18 is housed is. After passing the filter 4, the electrolyte is through a Schiit / 19 in the main space of the multiple steered cassette.

The excess electrolyte in the intermediate container 1 is discharged through a channel 20 into the bath 1. The electrolyte is made from animal mechanics by the Channels 8. the nozzle 9. the seal 11. the with the help 5 $ of the nut 12 is pressed against the nozzle, also the to be coated places of the part 17 passed.

The sealing of the coating zone, i.e. H. their insulation w ill be w ith the aid of the gasket 11 and the sealing washer 14 is reached.

The pressing of the part 17 against the seals Il and 14 takes place by means of the bar 13 which is movable in the vertical direction. With the help of a flat spring 21, the negative potential is supplied to part 17.

The electrolyte is in the bathroom 1 / returned.

1 sheet of drawings

Claims (3)

Patent claims: 1. Device for the selective electroplating of reticulated parts, with a channel for supply and a channel for discharging the electrolyte, characterized in that the supply channel (8) is on the one and the discharge channel the other side of the reticulated part (17) to be coated is arranged, and can be pressed against the part Seals (11, 14) are provided which delimit the zone to be coated. 2. Device according to claim 1, characterized in that that the supply channel (8) and an overflow channel (7) over the main space of a multi-point cassette (6 to 16) are connected to one another, and that the discharge channel with a compensating nozzle (16) is provided. 3. Apparatus according to claim 1 or 2, characterized in that several supply and discharge channels are connected in parallel to one another.