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Regeneration device of potassium permanganate with chemical drill-dirt cleaning function

A potassium permanganate and regeneration device technology, applied in the direction of electrolysis process, electrode shape/type, electrolysis components, etc., can solve the problems of high production cost, achieve the effect of meeting production requirements, reducing costs, and recycling and reusing potion components

Inactive Publication Date: 2015-12-02
PEKING UNIV FOUNDER GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is to overcome the technical defect that the production cost is higher in the PCB board desmear process in the prior art, thereby providing a kind of in the desmear process that can recycle potassium permanganate and further Chemical Potassium Permanganate Regeneration Device for Reducing Production Cost

Method used

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  • Regeneration device of potassium permanganate with chemical drill-dirt cleaning function

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Effect test

Embodiment 1

[0033] Such as figure 1 Shown is a chemical decontamination potassium permanganate regeneration device disclosed in the present invention, including: an anode 1 and a cathode 2 arranged in a potassium permanganate solution, wherein the anode 1 is cylindrical; the cathode 2 is arranged inside the anode 1; the effective conductive area ratio of the anode 1 to the cathode 2 is 20:1.

[0034] Because the main reaction formula in the potassium permanganate tank is:

[0035] Biting reaction:

[0036] Spontaneous reaction:

[0037] Precipitation reaction:

[0038] The present invention creatively uses electrolysis technology to promote the cyclic regeneration of potassium permanganate, so that a regeneration reaction is added in the potassium permanganate tank: The purpose of recycling potassium permanganate and stabilizing the composition of the potion is achieved, which effectively guarantees the effect of removing drilling dirt. And the anode of the regeneration device is cylindrical...

Embodiment 2

[0052] The structure of this embodiment is basically the same as that of embodiment 1, and the difference is that the anode 1 is cylindrical, and the effective conductive area ratio of the anode 1 to the cathode 2 is 18:1. Under this conductive area ratio, the current carrying capacity of the regeneration device can reach 135A, which can effectively extend the service life of the anode by 15-20%.

Embodiment 3

[0054] The structure of this embodiment is basically the same as that of embodiment 1, and the difference is that the effective conductive area ratio of the anode 1 to the cathode 2 is 22:1. Under this conductive area ratio, the current carrying capacity of the regeneration device reaches 165A. This device is only used to remove drilling dirt for circuit boards made of special materials. Because of its fast reaction speed, it oxidizes +6 Mn ions to +7. The speed of Mn ions increases with the increase, but this shortens the anode life by 25-30%.

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Abstract

The invention discloses a regeneration device of potassium permanganate with a chemical drill-dirt cleaning function in a circuit board copper deposition process. The regeneration device comprises an anode (1) and a cathode (2) which are arranged in a potassium permanganate solution. The anode (1) is cylindrical, and the cathode (2) is arranged on the inner side of the anode (1). The effective conductive area ratio of the anode (1) to the cathode (2) is 15-25:1. According to the regeneration device, the electrolysis technology is used for promoting cyclic regeneration of the potassium permanganate, the by-product of +6 manganese can be converted to required +7 manganese through electrolysis, the potassium permanganate can be recycled, and the by-product (potassium manganate) is reduced. The production requirements are met, and cost is reduced.

Description

Technical field [0001] The invention relates to the field of circuit board manufacturing, and specifically to a regeneration device for controlling and regenerating +7-valent manganese ions in the process of removing drilling contamination in the copper immersion process. Background technique [0002] In today's PCB production field, potassium permanganate decontamination solution is still the most widely used decontamination agent in the industry. It has the advantages of good stability, cost-effectiveness, and easy operation. It is very suitable for PCB multi-layer boards and special boards. It plays an important role in removing drilling dirt produced during drilling. [0003] However, in actual production, with the consumption of potassium permanganate (consumption of +7-valent manganese ions) and the increase of by-product potassium manganate (increase of +6-valent manganese ions), the effect of drilling contamination removal will gradually decrease, and even drill remo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00C25B11/02
Inventor 刘波谢海山
Owner PEKING UNIV FOUNDER GRP CO LTD