Anisotropic Organic Thin Film via Ionic Liquid Alignment

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Solution Overview

Problem

Existing methods for manufacturing anisotropic organic thin films, such as mechanical stretching and mechanical friction, result in films of large thickness and are unsuitable for stereoscopic components due to defects caused by particles generated in friction.

Innovation Solution

A method involving the deposition of a mixed solution containing an ionic liquid and a polymerizable material on a substrate, aligning the material using an external electric field, and subsequent polymerization to form aligned thin films, followed by the deposition and polymerization of liquid crystal molecules to create a thin film with aligned properties, eliminating the need for mechanical friction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If mechanical stretching method is used to manufacture anisotropic organic thin film, then the film can be obtained with relative large thickness suitable for subsequent attachment, but the film thickness is too large for stereoscopic components requiring thin films

Engineering Contradiction:

Improvefilm thickness controlVSAvoidapplicability to stereoscopic components

Core Design Contradiction:

Manufacturing precisionVSAdaptability or versatility

Solution Approach 1:

The patent changes the manufacturing parameters by using electrostatic deposition instead of mechanical stretching, controlling the electric field strength and deposition time to achieve precise thin film thickness control suitable for stereoscopic components

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the mechanical stretching method with an electrostatic field-based deposition method, where charged particles are deposited onto the substrate under the influence of an electric field, eliminating the need for mechanical contact and enabling thin film formation

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Manufacturing precision

If mechanical friction method is used to manufacture anisotropic organic thin film, then the film can be obtained on planar surfaces, but particles generated in friction cause electronically invalidation of component and the method has shadow effect on patterned stereoscopic component

Engineering Contradiction:

Improvesurface orientation qualityVSAvoidparticle contamination and shadow effect

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The patent replaces mechanical friction with electrostatic field action, where charged particles are guided by electric field lines to achieve uniform deposition without mechanical contact, eliminating particle generation and shadow effects

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces charged particles as an intermediary carrier that transfers the anisotropic structure information from the electric field to the film material, avoiding direct mechanical contact between the processing tool and the substrate

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This method allows for the production of anisotropic organic thin films with a relative thin thickness, suitable for stereoscopic components, without defects from friction, and is realized through a simple and cost-effective process.

Implementation Method 1

separating positive ions from negative ions in the ionic liquid, so that the polymerizable material is aligned

Methodology Applied

Scientific EffectIon separation in electric field: Electrophoresis

Implementation Method 2

polymerizing the aligned polymerizable material, so that an aligned first thin film is obtained after cured

Methodology Applied

Scientific EffectPhotopolymerization: Photopolymerisation

Implementation Method 3

depositing liquid crystal molecules on the first thin film after removing the ionic liquid, and polymerizing the liquid crystal molecules to form a second thin film

Methodology Applied

Scientific EffectPhysical vapor deposition: Physical Vapour Deposition

Data Source

PatentEP3199576B1Anisotropic organic thin film and method for preparation thereof

Publication Date: 2019.07.17 BOE TECHNOLOGY GROUP CO LTD

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AI summary

Disclosed are an anisotropic organic thin film and its manufacturing method. The method includes steps of: depositing a mixed solution including an ionic liquid and a polymerizable material on a substrate; separating positive ions from negative ions in the ionic liquid, so that the polymerizable material is aligned; polymerizing the aligned polymerizable material, so that an aligned first thin film is obtained after cured; and depositing liquid crystal molecules on the first thin film, and polymerizing the liquid crystal molecules to form a second thin film, wherein the second thin film is aligned in a way that matches with the first thin film, and the first thin film and the second thin film constituent the anisotropic organic thin film.