Flexible Display Graphene Release Layer Separation
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Solution Overview
Problem
Existing flexible display apparatuses face difficulties in being easily separated from support substrates during manufacturing, leading to handling challenges and potential damage to the flexible substrates.
Innovation Solution
A flexible display apparatus is manufactured with a flexible substrate having a display layer, graphene on its surface, and an encapsulation layer, where the substrate features nano-sized concave portions filled with graphene, and a method involving a metal layer with microprotrusions, a polymer layer, and an adhesive layer is used to facilitate easy separation from the support substrate using minimal physical force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a flexible substrate is used in display apparatus manufacturing, then flexibility and lightweight characteristics are improved, but handling difficulty and separation difficulty from support substrate worsen
Solution Approach 1:
A release layer is introduced as an intermediary between the flexible substrate and the support substrate. This release layer has controlled adhesion properties that allow the flexible substrate to be easily separated from the support substrate after manufacturing, solving the handling difficulty while maintaining the weight advantage of flexible substrates.
Solution Approach 2:
The adhesion strength between layers is dynamically controlled by changing the properties of the release layer. The release layer is designed with specific adhesion characteristics that provide strong bonding during manufacturing but enable easy separation afterward, thus improving ease of operation without sacrificing substrate flexibility or weight benefits.
2Weight of moving object
If a flexible substrate is used in display apparatus manufacturing, then flexibility and lightweight characteristics are improved, but separation difficulty from support substrate worsens
Solution Approach 1:
The release layer serves as a mediator that facilitates easy separation. It is positioned between the flexible substrate and support substrate, providing controlled adhesion that allows for simple separation processes while maintaining the lightweight advantage of flexible substrates throughout manufacturing.
Solution Approach 2:
The release layer is extracted or removed after serving its purpose during manufacturing and separation. This temporary layer enables easy separation of the flexible substrate from the support substrate without becoming part of the final product, thus improving separation ease while preserving substrate properties.
3Ease of manufacture
If graphene layer is added on flexible substrate, then adhesion control for easy separation is improved, but device structure complexity worsens
Solution Approach 1:
Graphene's unique structure and properties are utilized to control adhesion. The graphene layer provides controlled interaction with the support substrate through its atomic structure, enabling easy separation while adding minimal structural complexity. The two-dimensional nature of graphene allows it to function as an effective release layer without significantly increasing device complexity.
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 easy separation of the flexible substrate from the support substrate with minimal damage, improving handling and manufacturing efficiency by leveraging the weak adhesion properties of graphene layers.
Implementation Method 1
the graphene may fill at least a portion of the concave portions
Implementation Method 2
forming the microprotrusions may include forming nanoprotrusions extended from the metal material layer, by heat treatment
Data Source
AI summary
A flexible display apparatus includes a flexible substrate, a display layer disposed on one surface of the flexible substrate and including a plurality of pixels, graphene disposed on a surface opposing the one surface of the flexible substrate, and an encapsulation layer covering the display layer.