A wet etching device

Abstract

The invention provides a wet etching device. The wet etching device comprises a chemical tank, a resistance type pressure sensor, a chip, a single-chip and a displayer, wherein the chip is connected with the resistance type pressure sensor through a wire; the chip is connected with the single-chip through the wire; the single-chip is connected with the displayer through the wire; the resistance type pressure sensor, the chip and the single-chip are connected with a power source. The wet etching device is not affected by viscidity of an etching solution and can monitor the liquid level of the etching solution exactly.

Description

【Technical field】 [0001] The invention relates to the technical field of liquid crystal display screens, in particular to a wet etching device. 【Background technique】 [0002] In the manufacturing process of liquid crystal display, the wet etching process is one of the more important etching processes. In the state of automatic operation of the wet etching equipment, it is necessary to monitor the liquid level of the etching liquid in the chemical bath in real time, so as to discharge or replenish the etching liquid as required. At present, in the field of wet etching technology, the method for monitoring the liquid level of the etching liquid is to complete the monitoring of the liquid level of the etching liquid through multiple sets of magnetic induction buoy sensors, wherein each set of magnetic induction buoy sensors The indicator corresponds to a group of liquid level indicators. Under normal circumstances, there are six groups of important liquid level indicators, f...

AI Technical Summary

Problems solved by technology

Not only that, but in practical applications, the etching liquid is a liquid with a relatively high viscosity, and the magnetic induction buoy sensor is easily stuck in the liquid with a relatively high viscosity, resulting in inaccurate detection results or sending out wrong liquids. bit signal

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