Liquid knife and automatic cleaning method using liquid knife

Abstract

The invention provides a liquid knife and an automatic cleaning method using the liquid knife. The liquid knife comprises a liquid knife body, a scraping blade, a driving module and a control module.The liquid knife body is provided with a liquid knife edge. One end of the scraping blade is inserted into the inner portion of the liquid knife edge, and the scraping blade is used for scraping and wiping the foreign matter in the liquid knife edge. The driving module is connected to the other end of the scraping blade and used for driving the scraping blade to move in the liquid knife edge. Thecontrol module is connected with the driving module and used for sending a control signal to the driving module to control operation of the driving module.

Description

technical field [0001] The invention relates to the field of liquid crystal display panels, in particular to a liquid knife and an automatic cleaning method using the liquid knife. Background technique [0002] In the TFT-LCD (Thin Film Transistor-Liquid Crystal Display) array substrate manufacturing process, patterning processes such as exposure, development, etching, and stripping are required. Among them, in the ITO (Indium tin oxide, indium tin oxide) thin film etching process, oxalic acid is generally used for etching, and after the glass substrate enters the etching process, it is necessary to perform cleaning work to remove the etching solution on the glass substrate. [0003] When cleaning, when the glass substrate enters the spray, first use a liquid knife for high-pressure cleaning to remove the etching solution on the glass substrate. When the volume of glass substrates processed by the liquid knife increases, or the liquid knife is not sprayed for a long time du...

AI Technical Summary

Problems solved by technology

When the volume of glass substrates processed by the liquid knife increases, or the liquid knife is not sprayed for a long time during this period, there may be some small foreign matter in the water used by the liquid knife, and these foreign matters will stay inside the liquid knife edge and easily cause crystallization blockage , which in turn causes the liquid knife to produce bifurcations during the water spraying process

When the glass substrate is cleaned by the liquid knife, the brightness will be uneven due to the bifurcation of the liquid knife, and the yield rate of the product cannot be guaranteed.

In addition, at this stage, the only way to stop the operation of the equipment is to remove the crystallization of the liquid knife by manual wiping by the operator, or to adjust the tightness of the screw on the edge of the liquid knife to eliminate foreign matter.

However, these methods require increased equipment downtime and affect productivity

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