Apparatus for electrolytically treating printed circuit...

C - Chemistry – Metallurgy – 25 – D

Patent

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204/12.5

C25D 5/08 (2006.01) C25D 17/00 (2006.01) H05K 3/24 (2006.01)

Patent

CA 2287274

The invention relates to a device for electrolytic treatment of printed circuit boards (3). According to the invention, the printed circuit boards can be continuously guided through the inventive device in a plane of conveyance, in an essentially horizontal direction. The invention is characterised in that counter electrodes (1,2) are located on at least one side opposite and essentially parallel to the plane of conveyance, so that electrolyte chambers (4, 5) are formed between opposite counter electrodes or between the counter electrodes and the plane of conveyance, said counter electrodes each forming essentially continuous electrode surfaces. Guide elements (7, 8) for the printed circuit boards are located in the electrolyte chamber. Contact elements (11) are also provided for contacting the printed circuit boards electrically. Electrolyte spray devices (13) for spraying the electrolyte liquid against the surfaces of the printed circuit boards are also provided. Openings are made in the counter electrodes. The electrolyte spray devices are arranged on the sides of the electrodes facing away from the plane of conveyance in such a way that the electrolyte fluid leaving the devices is able to pass through the counter electrodes at the point of the openings in an essentially unobstructed manner and can reach the surfaces of the printed circuit boards.

L'invention concerne un dispositif de traitement électrolytique de carte de circuits (3), à travers lequel les cartes de circuits peuvent être guidées en continu dans un plan de transport dans une direction de transport pratiquement horizontale. Ce dispositif présente les caractéristiques suivantes: des contre-électrodes (1, 2) sont montées, au moins sur un côté, face au plan de transport et pratiquement parallèlement à celui-ci, de façon à former des chambres d'électrolyte (4, 5) entre les contre-électrodes se faisant face ou entre les contre-électrodes et le plan de transport. Les contre-électrodes forment chacune des surfaces d'électrodes pratiquement ininterrompues. Des éléments de guidage (7, 8) pour les cartes de circuits sont placés dans la chambre d'électrolyte. Des éléments de contact (11) sont prévus pour assurer le contact électrique des cartes de circuits. En outre, des unités de pulvérisation d'électrolyte (13) sont prévues pour transporter le liquide électrolytique contre les surfaces des cartes de circuits. Des ouvertures sont ménagées dans les contre-électrodes. Les unités de pulvérisation d'électrolyte sont placées sur les côtés des contre-électrodes, opposés au plan de transport, de sorte que le liquide électrolytique sortant desdites unités puisse passer pratiquement sans entrave par les contre-électrodes, à l'endroit des ouvertures, et puisse parvenir aux surfaces des cartes de circuits.

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