SU1541309A1 - Cathode unit for producing pattern-making residue - Google Patents

Abstract

The invention relates to equipment for producing electroplated coatings according to an intensive, high-speed method, preferably in a directional electrolyte flow, namely, devices for producing simulating sludge in the holes of printed circuit boards, and can be used in laboratory installations for the study of galvanic deposition in the holes of printed circuit boards performed by the velocity method in the upstream electrolyte flow. The purpose of the invention is to increase productivity by allowing the simultaneous production of several samples in the upstream electrolyte. A T-shaped yoke 36 and a separator 37 are installed on the assembled body 1. The body 1 is lowered into the treatment chamber 42, the pump 39 is turned on and the electrolyte is fed through the pipeline 40 into the chamber 41, and from there into the processing chamber 42, separated by a flow separator 37 and The body 1 flows around at high speed, moves upwards and flows into the tank 38 through the drain chambers 45 and 46. Positive potential is applied to the anodes 43 and 44, and electroplating is carried out to the body 1 negative. The design features of the unit allows you to quickly set the processing mode for a specific batch of boards with a high degree of confidence. 4 hp ff, 3 ill.

Description

The invention relates to equipment for producing electroplated coatings according to an intensive, high-speed method, preferably in a directional electrolyte flow, more specifically to devices for producing a simulating deposit in the holes of printed circuit boards, and can be used in laboratory installations for the study of galvanic deposition in the hole x printed circuit boards, performed by the speed method in the upstream electrolyte flow.

The purpose of the invention is to increase pro-effectivity by providing

3

the ability to simultaneously obtain several samples in an upstream electrolyte stream.

FIG. 1 shows a cathode block, a general view, in FIG. 2 is a sectional view of a galvanic cell with a cathode block; in FIG. 3 - details of the cathode block, isometry.

The cathode block contains a housing 1 with through slots 2-4, equipped with dielectric inserts 5 and 6 with electrically conductive plates 7-11 on inserts 5, 6 and plates 12-17 on housing 1 "At the same time the grooves 2-4 in housing 1 are horizontal, vertically, on either side of its vertical axis 18. Inserts 5 and 6 contain similar grooves 19 and 20, located on one side of the outer end of liners 5 and 6. The latter are located on both sides of the housing 1. Plates 7, 14, 15, 11 and 10 are located. On the protrusions of the grooves, and the plates 8, 9, 12, 13, 16 and 17 are on the valleys of call casing 1 and liner 5 and 6. In the outer covering body. 1 parts of the liners 5 and 6 are provided with oval holes 21 and 2.2 with a vertical axis, which are symmetrically threaded holes 23 in case 1.

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five

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The inserts 5 and 6 on the housing 1 are fixed with screws 24. On the horizontal shelves of the slots of the housing 1 and the liners are grooves 25-31, which form parallel to the bottom of the depressions of the slots of the liners 5 and 6 of the housing 1. To the outer vertical ends of the liners 5 and 6 there are fixed prisms 32 and 33 of sponge elastic polymer material. At the upper end of the block, formed by the upper ends 34 of the housing 1 and the upper ends 35 of the liners, there is a T-shaped cross member 36. At the lower end of the cathode block, a flow divider 37 is fixed, having the appearance of a prism with a triangular base with two curvilinear sides, whose apex directed toward the flow and its projection onto the horizontal axis is located outside the projection of the other two grains of the base triangle, the prism, and is directed towards the electrolyte flow. The cell for the cathode block comprises a tank 38, through a pump 39 and a pipe 40 connected to a filling chamber 41, in the lower part connected to the processing chamber 42. On the walls forming the latter, anodes 43 and 44 are fixed. On both sides of the treatment chamber 42, chambers 45 and 46 are disposed, connected to tank 38. The cathode block is mounted with a T-shaped cross bar 36 on the top cover 47

cells, with the conductive plates 7-17 after installing the cathode block perpendicular to the anodes 43 and 44 and connected to the busbars (not shown).

The cathode block operates as follows.

The liners 5 and 6 are put on the housing 1, and their projections are inserted into the slots 2-4 of the housing 1 and vice versa. Install the T-shaped traverse 36 and the separator 37. Previously without tightening

pints 24 are installed. A gap is set between the conductive plates, e.g. 11 and 13, and screws 24 are set. Lower the cathode block into the treatment chamber 42. The pump 39 is turned on, and the electrolyte through the pipeline 40 enters the filling chamber 41, and from it, according to the law of communicating vessels, the electrolyte moves into the processing chamber 42, is separated by a flow separator 37 and flows around the cathode block with greater speed, moves up and flows into the tank 38 through chambers 45 and 46 plum. Positive potential is applied to the anodes 43 and 44, and a negative potential is applied to the cathode block, the electroplating process begins.

After the electroplating process is completed, the plates 11 and 13 are removed from the cathode block and the precipitate and its properties are studied. Since the plates are distributed over the entire cross section of the cathode block, all necessary information on the metallization of the holes in all areas of the printed circuit board is obtained immediately. This is especially important for group blanks, large sizes, which have different thickness and quality of sediment in different zones. By adjusting the mutual position of the housing 1 and the liners 5 and 6, it is possible to obtain a model of the sediment in the openings of different diameters. Prisms 32, when adjusted, concentrate the increase or decrease in the length of the cathode block and permanently seal the gap between the cathode block and the walls of the chamber 42 of the metallization cell.

Claims (5)

1. A cathode block for producing a modeling deposit comprising a body with through slots of dielectric material, dielectric inserts with electrically conductive plates and holes for fastening inserts relative to the housing, characterized in that, in order to increase productivity by allowing simultaneous receiving several samples in the upstream electrolyte flow, the through slots in the housing are made in the form of horizontal slots on both sides of the vertical axis of the housing; 5 end faces of each liner are made of similar through grooves located offset by one groove relative to the grooves on the housing, and conductive plates are installed on the vertical walls of the through grooves in the housing and in each liner. 2. The unit according to claim 1, characterized in that the horizontal shelves have grooves in the housing and along liners 5 additionally, horizontal grooves are provided for accommodating conductive plates therein. 3.Block pop. 1 and 2, I distinguish u and with the fact that it is supplied 0 prisms installed on the outer end surface of each liner, while the prisms are made of a spongy, chemically flexible sponge resistant plastic material. 4. Block on PP. 1-3, characterized in that it is provided with a T-shaped crossmember mounted on the upper plane of the body and the liners. 5. The block according to claim 1, wherein QI is different from the fact that it is provided with a flow divider made in the form of a prism with a base in the form of a triangle, and two curvilinear sides, one of which is convex, 5 and the other is concave, with the projection of the top of the prism on the base lying outside the plane of the base. five and BUT J7 6 V 19 Fig1 foggy