Device for preparing thin film by liquid level drawdown method

A thin film and liquid surface technology, which is applied to the device and coating of the surface coating liquid, can solve the problems of uncontrollable coating environment, uneven coating, complex and expensive equipment, etc.

Inactive Publication Date: 2010-11-17
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem of the present invention is to improve the shortcomings of the existing sol coating technology such as uneven coating, ...

Method used

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  • Device for preparing thin film by liquid level drawdown method
  • Device for preparing thin film by liquid level drawdown method

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, technical scheme of the present invention is described further: figure 1 Shown, a kind of device that the liquid level drops method prepares thin film, this device comprises:

[0024] A transparent outer cover 1 is a cylinder with a movable upper cover 14 on the top for fixing the substrate support 12 and sealing and dustproof;

[0025] A substrate support 12, which can be a hook-shaped body, is fixed at the center of the upper cover 14;

[0026] A partition 8, located in the middle of the cylindrical transparent cover 1, separates the transparent cover into upper and lower spaces; the partition 8 is provided with a plurality of air holes 9, and the center of the partition is provided with a hole of the same size as the piston sleeve; The above-mentioned multiple air holes 9 are evenly distributed on the surface of the partition, and are used for gas circulation between the upper and lower parts of the transparent outer c...

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PUM

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Abstract

The invention relates to a device for preparing a thin film by a liquid level drawdown method, which controls the stable liquid level drawdown of sol by utilizing the principle of hydraulics and realizes uniform film coating on a substrate. The device mainly comprises a hydraulic piston, a hydraulic piston sleeve, a substrate bracket and the like. The uniform film coating of the sol on the surface of the substrate is implemented by the following steps: hanging the substrate with a clean surface on a sample bracket at a top end, fixing a container accommodating the sol at the top end of the hydraulic piston, closing a liquid outlet of a hydraulic pipeline at the lower end of the device, injecting liquid (water or oil) into the piston sleeve through a liquid inlet by using a hydraulic pump, driving the container accommodating the sol to move upwards by using the piston, and gradually impregnating the hung sample substrate in the sol so as to finish a substrate impregnation process; and stopping injecting the liquid, opening the liquid outlet and making the piston move downwards. The device controls the injection flow rate and drainage flow rate of the liquid by utilizing a flow-limiting valve so as to accurately control the film coating speed and can be charged with a drying gas to control the atmosphere of the film coating environment by a gas passage arranged on the device. Due to the design of small holes on a baffle plate in the device, the airflow disturbance is reduced, thereby ensuring more stable film coating process.

Description

technical field [0001] The invention relates to a device for preparing thin films by a liquid level drop method, which is suitable for various thin films prepared by sol, and relates to the fields of materials, chemistry, physics, machinery, electronics and the like. Background technique [0002] The traditional immersion-pulling method generally adopts the substrate-pulling method to prepare thin films, that is, after the substrate is immersed in the sol, the transmission device is used to lift the substrate out of the liquid surface to realize the coating process. The device provided by the invention fixes the substrate, and uses a simple hydraulic principle to realize the lifting of the liquid level of the sol, thereby completing the coating process on the surface of the substrate. [0003] The advantage of the device over the traditional pull-coating method is that a stable and uniform immersion pull-coating process can be achieved by using a simple current limiting devi...

Claims

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Application Information

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IPC IPC(8): B05C3/02B05C3/09B05D1/18
Inventor 张俊英潘锋朱海玲王天民张巍巍
Owner BEIHANG UNIV
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