Flexible Device Transfer Apparatus with Adhesion Layer
Solution Overview
Problem
Conventional methods for fabricating flexible electronic devices face issues such as substrate distortion, misalignment of circuits, and a slow throughput due to peeling problems between flexible substrates and glass carriers, particularly during the debonding process.
Innovation Solution
A transferring apparatus and method involving a carrier substrate with a release layer and an adhesion layer, where the adhesion layer surrounds the release layer and is adjacent to its sidewall, allowing for efficient separation of the flexible substrate from the carrier substrate using techniques like laser gasification or cutting, thereby preventing peeling and improving process stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a release film is deposited on a glass carrier to enable separation, then the flexible substrate can be separated from the carrier, but the deposition time becomes too long for practical fabrication
Solution Approach 1:
The patent changes the material parameters of the release layer from conventional long-deposition materials to organic release materials that can be rapidly deposited. This parameter change in material composition and deposition characteristics directly reduces the deposition time while maintaining the release function, resolving the contradiction between separation capability and deposition time.
2Reliability
If a laser beam scans the release layer to gasify it for separation, then the flexible substrate can be separated from the carrier, but the scanning time increases with substrate area reducing throughput
Solution Approach 1:
The patent replaces the mechanical scanning laser system with a stationary laser source combined with a moving substrate approach. The substrate is fed through the stationary laser beam, eliminating the need for time-consuming laser scanning across large areas. This substitution of the separation mechanism directly improves throughput while maintaining separation capability.
3Reliability
If a laser beam scans the release layer for separation, then the flexible substrate can be separated from the carrier, but the laser may pass through the substrate and destroy components reducing fabrication yield
Solution Approach 1:
The patent extracts the laser processing step from the substrate area and applies it only to the release layer region. By using a stationary laser that processes only the release layer at the interface, the harmful laser exposure to the flexible substrate and its components is eliminated, preventing damage while maintaining separation capability.
4Reliability
If conventional debonding methods are used, then separation can be achieved, but peeling problems occur between the flexible substrate and glass carrier
Solution Approach 1:
The patent introduces an organic release layer as an intermediary between the glass carrier and the flexible substrate. This release layer acts as a mediator that enables clean separation without direct peeling between the substrate and carrier, preventing damage to the substrate while maintaining separation capability.
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 approach prevents substrate distortion and misalignment, enhances process yield, and reduces fabrication costs by ensuring reliable separation of flexible electronic devices from carriers without the slow throughput and damage issues of conventional methods.
Implementation Method 1
An adhesion layer is disposed on a portion of the carrier substrate, surrounding the release layer and adjacent to a sidewall of the release layer
Implementation Method 2
A flexible substrate is separated from the carrier substrate by gasifying the release layer using a laser beam
Data Source
AI summary
The invention provides a transferring apparatus for a flexible electronic device and method for fabricating a flexible electronic device. The transferring apparatus for the flexible electronic device includes a carrier substrate. A release layer is disposed on the carrier substrate. An adhesion layer is disposed on a portion of the carrier substrate, surrounding the release layer and adjacent to a sidewall of the release layer. A flexible electronic device is disposed on the release layer and the adhesion layer, wherein the flexible electronic device includes a flexible substrate.