Water inlet structures of passivated rinsing tank and subordinate-liquid rinsing tank of PCB

Abstract

The invention discloses water inlet structures of a passivated rinsing tank and a subordinate-liquid rinsing tank of a PCB. The passivated rinsing tank is arranged adjacent to the subordinate-liquid rinsing tank; a first water inlet is formed in the bottom of the passivated rinsing tank; a water inlet pipe is connected with the first water inlet of the passivated rinsing tank; an overflow port is formed in the upper part of the passivated rinsing tank; a second water inlet is formed in the lower part of the subordinate-liquid rinsing tank; and the overflow port of the passivated rinsing tank is connected with the second water inlet of the subordinate-liquid rinsing tank through an overflow pipe. According to the water inlet structures of the passivated rinsing tank and the subordinate-liquid rinsing tank of the PCB, the passivated rinsing tank and the subordinate-liquid rinsing tank are disconnected; water is pumped into the passivated rinsing tank; the liquid in the passivated rinsing tank overflows to the subordinate-liquid rinsing tank through the overflow pipe; the mutual circulation of the liquid in the passivated rinsing tank and the subordinate-liquid rinsing tank can be blocked, so as to avoid pollution of the liquid in the tanks and to ensure normal production.

Description

technical field [0001] The invention belongs to the field of printed circuit board manufacturing, and in particular relates to an improved water inlet structure of a post-passivation water wash tank and a post-sub-liquid water wash tank. Background technique [0002] In the prior art, the post-passivation washing tank of the PCB is adjacent to the sub-liquid post-washing tank, and during water washing, the bottoms of the passivated post-passivation washing tank and the sub-liquid post-washing tank are connected to each other through a connecting pipe for further The water pipe leads into the washing tank after the sub-liquid, and the washing water flows through the connecting pipe in the washing tank after passivation and the washing tank after the sub-liquid. Since the passivation is acidic and the sub-liquid is alkaline, the liquids in the two washing tanks are mutually The circulation will cause chemical reaction to produce crystallization, which will cause the water qual...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the post-passivation washing tank of the PCB is adjacent to the sub-liquid post-washing tank, and during water washing, the bottoms of the passivated post-passivation washing tank and the sub-liquid post-washing tank are connected to each other through a connecting pipe for further The water pipe leads into the washing tank after the sub-liquid, and the washing water flows through the connecting pipe in the washing tank after passivation and the washing tank after the sub-liquid. Since the passivation is acidic and the sub-liquid is alkaline, the liquids in the two washing tanks are mutually The circulation will cause chemical reaction to produce crystallization, which will cause the water quality to turn black and affect the bath liquid, and it will easily lead to pipeline blockage and affect normal production

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