Inorganic De-bonding Layer for Flexible Substrate Separation
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Solution Overview
Problem
The manufacturing process of flexible active device substrates often faces difficulties in separating the flexible substrate from a glass plate due to strong attractive forces, which can damage the active devices.
Innovation Solution
Incorporating an inorganic de-bonding layer made of metal or metal oxide on the flexible substrate, which covers the surface opposite to where the active devices are disposed, allowing for easier separation by reducing the attractive forces between the substrate and the glass plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible substrate is fixed on the glass plate to form the flexible active device substrate, then the manufacturing process becomes convenient and stable, but the attractive forces between the flexible substrate and the glass plate become too large making it difficult to separate them
Solution Approach 1:
An inorganic de-bonding layer is introduced as an intermediary between the flexible substrate and the glass plate. This layer has strong adhesion to both surfaces, providing stable fixation during manufacturing while enabling easy separation when needed. The de-bonding layer acts as a mediator that temporarily bonds the substrate to the plate but can be cleanly removed afterward.
Solution Approach 2:
The bonding interface is segmented into multiple functional layers: the flexible substrate, the inorganic de-bonding layer, and the glass plate. This segmentation allows each layer to perform its specific function - the de-bonding layer specifically manages the bonding and debonding process, while the substrate and plate maintain their structural roles.
2Reliability
If strong attractive forces exist between the flexible substrate and the glass plate, then stable fixation is achieved during manufacturing, but the active devices may be damaged during the peeling process
Solution Approach 1:
The inorganic de-bonding layer serves as a protective intermediary that absorbs the mechanical stress during peeling. Instead of the substrate and glass plate being directly bonded and torn apart, the de-bonding layer fails in a controlled manner, protecting the active devices on the flexible substrate from damage.
Solution Approach 2:
The de-bonding layer is positioned beforehand between the substrate and glass plate to cushion against potential damage. Its presence before the peeling process ensures that when separation occurs, the stress is distributed through the de-bonding layer rather than concentrating on the active devices.
3Strength
If the flexible substrate is directly bonded to the glass plate without a de-bonding layer, then strong adhesion is achieved, but complete separation becomes difficult and time-consuming
Solution Approach 1:
The inorganic de-bonding layer is designed with specific adhesion characteristics - strong enough to provide stable fixation during manufacturing but engineered to allow controlled separation. This intermediary layer enables the process to achieve both strong bonding and easy debonding, resolving the contradiction between adhesion strength and separation ease.
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
The inorganic de-bonding layer effectively reduces the attractive forces, preventing damage to the active devices during the peeling process and enabling a more efficient manufacturing method for flexible active device substrates.
Implementation Method 1
when the attractive forces between the flexible substrate and the glass plate is too large, it is difficult to completely separate the flexible substrate and the glass plate
Data Source
AI summary
An active device substrate includes a flexible substrate, an inorganic de-bonding layer, and at least one active device. The flexible substrate has a first surface and a second surface opposite to the first surface, wherein the first surface is a flat surface. The inorganic de-bonding layer covers the first surface of the flexible substrate, and the material of the inorganic de-bonding layer is metal, metal oxide or combination thereof. The active device is disposed on or above the second surface of the flexible substrate.