Flexible circuit board etching liquid concentration control device

Abstract

The invention relates to a flexible circuit board etching liquid concentration control device belonging to the technical field of etching liquid detection and control devices and comprising a testing box with a box cavity, an etching pool, a liquid inlet pipe and a liquid return pipe. The testing box is provided with a controller as well as an oxidant probe, a hydrochloric acid probe and a hydrometer which are respectively and electrically connected with the controller and extend into the testing box; the etching pool is provided with an oxidant adding pipe, a hydrochloric acid inlet pipe and a water inlet pipe; the oxidant adding pipe, the hydrochloric acid inlet pipe and the water inlet pipe are respectively provided with a control valve; the control valves are electrically connected with the controller; one end of the liquid inlet pipe is connected with the etching pool, the middle is provided with a conveying pump and a valve, and the other end extends into the testing box; and one end of the liquid return pipe is connected with the etching pool and the other end is connected with the testing box. The invention has the characteristic that the oxidant probe is inserted into the pipe cavity of the liquid inlet pipe. The invention has the advantage of ensuring the etching effect of the etching pool to FPC boards.

Description

technical field

[0001] The invention belongs to the technical field of etching liquid detection and control devices, and in particular relates to a flexible circuit board etching liquid concentration control device. Background technique

[0002] During the processing of flexible printed circuit (FPC) boards, in order to use etching solution to etch the FPC to form a circuit structure, the oxidant in the etching solution, that is, copper chloride, has more or less components, which will cause unfavorable factors. For example, when the oxidant component is small That is, when the content is low, the etching speed becomes slow or even impossible to etch, while too much will cause unnecessary waste. Therefore, manufacturers of FPC boards usually provide an etching solution concentration control device in the etching pool (also known as a working pool), and the etching pool is connected to the test box of the etching solution concentration control device by a pipeline, and the et...

Examples

Embodiment Construction

[0017] Please refer to the accompanying drawings, the test box 1 equipped with a controller 11, an oxidant probe 12, a hydrochloric acid probe 13 and a hydrometer 14 can be purchased from the market. The name is Oxidizer Regeneration Addition Controller. The aforementioned oxidant probe 12 , hydrochloric acid probe 13 and hydrometer 14 are all electrically connected to the controller 11 by lines. A hydrometer test barrel 16 is separated in the chamber cavity 15 of the test box 1, and the hydrometer 14 is corresponding to the barrel chamber of the hydrometer test barrel 16, and a liquid introduction hole 161 is provided at the bottom of the hydrometer test barrel 16, and the liquid introduction The hole 161 communicates with the tank cavity 15 .

[0018] One end of a liquid inlet pipe 3, namely the right end shown in the figure, is connected to the lower part of the etching pool 2 and communicated with the etching pool 2. The middle part of the liquid inlet pipe 3 is equipped ...

technical field

[0001] The invention belongs to the technical field of etching liquid detection and control devices, and in particular relates to a flexible circuit board etching liquid concentration control device. Background technique

[0002] During the processing of flexible printed circuit (FPC) boards, in order to use etching solution to etch the FPC to form a circuit structure, the oxidant in the etching solution, that is, copper chloride, has more or less components, which will cause unfavorable factors. For example, when the oxidant component is small That is, when the content is low, the etching speed becomes slow or even impossible to etch, while too much will cause unnecessary waste. Therefore, manufacturers of FPC boards usually provide an etching solution concentration control device in the etching pool (also known as a working pool), and the etching pool is connected to the test box of the etching solution concentration control device by a pipeline, and the et...

Examples

Embodiment Construction

[0017] Please refer to the accompanying drawings, the test box 1 equipped with a controller 11, an oxidant probe 12, a hydrochloric acid probe 13 and a hydrometer 14 can be purchased from the market. The name is Oxidizer Regeneration Addition Controller. The aforementioned oxidant probe 12 , hydrochloric acid probe 13 and hydrometer 14 are all electrically connected to the controller 11 by lines. A hydrometer test barrel 16 is separated in the chamber cavity 15 of the test box 1, and the hydrometer 14 is corresponding to the barrel chamber of the hydrometer test barrel 16, and a liquid introduction hole 161 is provided at the bottom of the hydrometer test barrel 16, and the liquid introduction The hole 161 communicates with the tank cavity 15 .

[0018] One end of a liquid inlet pipe 3, namely the right end shown in the figure, is connected to the lower part of the etching pool 2 and communicated with the etching pool 2. The middle part of the liquid inlet pipe 3 is equipped ...

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