JPS62102852A - Apparatus for producing thin organic film - Google Patents

Abstract

PURPOSE:To easily form a monomolecular film consisting of a material having softness by moving a belt toward the lateral side with respect to the direction where the film is pressurized in the central part thereby releasing the pressure in the stage of compressing the monomolecular film on the boundary face by the belt. CONSTITUTION:This invention relates to an apparatus for producing a thin org. film by sticking and accumulating the monomolecular film developed on the liquid-liquid or gas-liquid boundary face to a substrate, in which the belt is put on in such a manner as to release part of the compression in the direction lateral with the compression direction in the central part of the compression corresponding to lateral side of the immersing position of the substrate 5. Then the apparatus is made applicable widely to dynamic sticking methods except a horizontal sticking method is sufficiently in a vertical dipping method, etc., the method is successfully operable at a high accumulating of 3-7 times the speed and the productivity of the uniform and stable film is remarkably im proved. A material which is required to considerably decrease the accumulating speed is particularly stably formed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for producing an organic thin film by depositing and accumulating a monomolecular film developed on a liquid-liquid or gas-liquid interface on a substrate.

The organic thin films obtained in this way can be controlled in thickness on the order of angstroms and have high functionality, and are widely used in optical, electrical and electronic components and their manufacturing processes, metal surface treatment, pharmaceuticals, etc. There are fields of use.

[Summary of the invention]

The present invention uses a belt to compress the monolayer on the liquid-liquid or gas-liquid interface to deposit and accumulate the monolayer on the substrate, while applying pressure in the central part of the substrate where the immersion takes place. By moving the belt sideways to the direction of the movement and releasing a portion of the pressure, the monomolecular film on the interface is prevented from collapsing, and the monomolecular film of a material with low flexibility, which was difficult to produce in the past, can be formed. It can be easily made.

[Conventional technology]

Conventionally, Bloc was used to compress the monomolecular film on the gas-liquid interface in order to adhere and accumulate it on the substrate.
Compression using piston oil and the method of compressing by moving a float, devised by John Lgett, have been carried out on an experimental scale. In addition, as shown in Part 2, there is also a method in which the membrane material is moved and compressed using a rotating cylinder.

In addition, a compression method in which a belt is wrapped in a concave shape and the concave portion of the belt is moved inward as shown in Figure 3, which can be applied to the compression of monomolecular films on both gas-liquid and liquid-liquid interfaces, is an electronic balance. It has good compatibility with the interfacial pressure feedback mechanism proposed by et al., and is widely used.

[Problems and objectives to be solved by the invention] However, with the above-mentioned method using piston oil or float, it is not possible to increase the size of the substrate, contamination of the monomolecular film due to leakage of piston oil, and problems due to gaps in the float. There are problems such as difficulty in forming a stable film due to leakage. Furthermore, the method using a rotating cylinder is not suitable for high surface pressure, and has drawbacks such as adhesion to the cylinder and peeling, which disturbs the structure of the monomolecular film.

In compression caused by the movement of a belt placed in a concave shape, the movement of the belt and monomolecular film is basically inconsistent at the part where they are in contact, so stress acts and destroys the structure of the monomolecular film. There is. This is not limited to only this type of work, but in general, the movement of the film material due to compression and the movement of the film material due to adhesion to the substrate has never failed, and stress such as rubbing and slipping is working in the boundary area. , due to its relaxation, the speed of compression and adhesion to the membrane material could not be increased.

The present invention aims to eliminate the destruction and contamination of the monomolecular film structure as described above, and to obtain a uniform and stable organic thin film even if the productivity is increased by increasing the film compression and adhesion speed. It is.

[Means for solving problems]

The basic structure of the present invention is to apply a belt so as to release part of the compression in the direction transverse to the compression direction at the center of the compression, which is next to the immersion position of the substrate, as shown in Figure 1. It is characterized by FIG. 1 merely shows the basic concept, and the present invention does not necessarily take this form;
As shown in Figure 6, this is applicable to all systems that partially release compression at the center of the compression.

〔Example〕

A hexane solution of stearic acid (concentration 0.05 g/100 ml) was gently dropped onto the interface between water and air, which was further distilled from pure water that had been subjected to double-field reverse osmosis and ion exchange twice.
After adding Cl so that the aqueous layer was 10-'M, the solvent hexane was removed, and the free cadmium salt on the water surface was replaced with the cadmium salt in the monolayer, as shown in Figures 3 to 6. Compressed with a Teflon-coated glass belt placed in the shape shown,
It adhered and accumulated on the substrate. Surface pressure is 30dyn/am
In the conventional compression using a concave belt, the film structure becomes unstable when the immersion rate of the substrate exceeds 2 On+m/win, but with the method of the present invention, the film structure becomes unstable when the substrate immersion rate exceeds 100+ am/m.
A stable film could be formed even when the film was injected, and no disturbance in the surface structure was found even when observed using a polarizing microscope and SEM.

Further, the orientation of the film material was confirmed by FT-IH measurement, and the interplanar spacing by X-ray diffraction was also unchanged.

Furthermore, monomolecular membranes were similarly applied to film materials containing unsaturated alkyls such as octadecyl acrylic acid, diacetylene carboxylic acid derivatives, and omega-tricosenic acid, and LB film materials containing dyes such as cyanine, merocyanine, and squarylium. Compression, adhesion, and accumulation were carried out, and uniform and stable film formation was possible in all cases up to a cumulative speed of 3 to 7 times.

Furthermore, when applied to a rotating cylinder, a similar improvement in cumulative speed was observed, but the degree of improvement was low, ranging from 1.5 to 4 times.

〔Effect of the invention〕

The present invention can be widely applied to dynamic adhesion methods other than horizontal adhesion, and can improve the productivity thereof.

In particular, the vertical immersion method and similar substrate immersion methods can accommodate a 3 to 7 times higher accumulation rate, and can greatly improve the productivity of uniform and stable films. Furthermore, it is possible to form a particularly stable film with respect to substances that are conventionally difficult to produce and require an extremely low accumulation rate.

[Brief explanation of drawings]

FIG. 1 is an example of a top view of how the belt is applied, and FIG. 2 is a sectional view of compression by a rotating cylinder. Also, Figures 3 to 6
The figure is another example of a top view of how to put on the belt. that's all

Claims (1)

[Claims] When the monomolecular film on the interface is compressed by a belt in order to spread the monomolecular film on the liquid-liquid or gas-liquid interface and deposit it on the substrate, the center part of the film is compressed in the direction of compression. An organic thin film production device characterized by setting and moving a belt so as to release part of the pressure laterally.