2D Material Transfer via Adhesion Layer for Precise Patterning

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Solution Overview

Problem

Existing methods face challenges in handling and patterning 2D materials, including difficulty in controlling shape, position, and thickness, and are prone to damage or contamination during application to devices.

Innovation Solution

A method involving a substrate structure with multiple material layers, where the bonding forces between layers are manipulated to selectively separate and transfer 2D materials, allowing precise patterning and control over shape, position, and thickness, using van der Waals bonding to minimize damage and contamination.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional methods are used to handle and pattern 2D materials, then the processing can be performed, but the 2D materials are prone to damage or contamination and it is difficult to control shape, position, and thickness

Engineering Contradiction:

Improvecontrol of shape, position, and thickness of 2D materialVSAvoiddamage or contamination of 2D material

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an adhesion target layer as an intermediary between the 2D material and the substrate. This layer mediates the interaction by providing controlled adhesion forces that enable precise positioning and patterning of the 2D material without direct contact with the substrate, thereby preventing damage and contamination while achieving accurate control over shape, position, and thickness

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces conventional mechanical handling methods with van der Waals bonding mechanisms. By utilizing these weak intermolecular forces between the 2D material and the adhesion target layer, the system achieves precise control and positioning without the mechanical stress and damage associated with traditional handling techniques

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of manufacture

If 2D materials are applied to devices using existing methods, then device fabrication can proceed, but the 2D materials may be damaged or contaminated

Engineering Contradiction:

Improveease of applying 2D material to deviceVSAvoidintegrity of 2D material (damage-free, contamination-free)

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The adhesion target layer serves as a protective intermediary during the entire fabrication process. It enables easy transfer and application of 2D materials to devices while shielding them from direct exposure to harsh fabrication environments, thus maintaining material integrity and preventing contamination

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent creates a protected environment by using the adhesion target layer as a barrier that isolates the 2D material from external harmful factors during fabrication. This inert-like protection allows straightforward manufacturing processes while preserving the reliability and purity of the 2D material

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

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

Enables precise and damage-free patterning and transfer of 2D materials, applicable to various devices, including semiconductors, displays, and sensors, with controlled thickness and shape, and suitable for materials vulnerable to external environments.

Implementation Method 1

adhering the crystalline material member to a surface of the adhesion target layer so that a bond is formed between the crystalline material member and the adhesion target layer

Methodology Applied

Scientific Effectvan der Waals bonding: Van der Waals Force

Data Source

PatentUS12468222B2Method for selective separation and transfer of two-dimensional material and method of fabricating device using the same

Publication Date: 2025.11.11 SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION

AI summary

A disclosed method of selective separation and transfer of 2D material may include preparing a substrate structure including an adhesion target layer in which at least two different material layers are arranged to be in contact with each other laterally, preparing a crystalline material member including a 2D material, wherein the 2D material constitutes a unit layer, and a plurality of the unit layers form a layered structure through bonding, adhering the crystalline material member to a surface of the adhesion target layer so that a bond is formed between the crystalline material member and the adhesion target layer, and separating the crystalline material member and the adhesion target layer so that a 2D material layer pattern separated from the crystalline material member is formed on the surface of the adhesion target layer.