Flexible Substrate Separation Patterns for Static Electricity Control
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Solution Overview
Problem
Conventional flexible display devices are prone to damage from static electricity when the flexible substrate is peeled from the support substrate during manufacturing, which can harm the organic light emitting diode.
Innovation Solution
A flexible substrate with separation patterns and grooves is designed to control static electricity, featuring poly indium tin oxide and an organic material like polyimide, and a method involving a separation layer, photosensitive patterns, and dry etching to form the substrate, ensuring the substrate can be peeled without damaging the organic light emitting diode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the flexible substrate is peeled from the support substrate during manufacturing, then the flexible display device can be assembled, but static electricity is generated and discharged which can damage the organic light emitting diode
Solution Approach 1:
A separation layer made of amorphous indium tin oxide (a-ITO) is introduced between the flexible substrate and support substrate. This intermediary layer controls static electricity generation during peeling by providing a controlled interface that reduces harmful electrostatic discharge to the organic light emitting diode, while still allowing the peeling process to proceed for device assembly.
Solution Approach 2:
The separation layer's material properties (amorphous indium tin oxide with specific thickness of 300-1100 Å) are optimized to control electrical parameters during peeling. By adjusting the layer's composition and thickness, the static electricity generation is regulated to safe levels that prevent damage to sensitive components while maintaining manufacturing feasibility.
2Reliability
If a separation layer is added to control static electricity, then damage to the organic light emitting diode is prevented, but the device structure becomes more complex
Solution Approach 1:
The separation layer is designed with specific parameter ranges (amorphous indium tin oxide, 300-1100 Å thick) that optimize its protective function while minimizing structural complexity. These controlled parameters ensure reliable static electricity management without requiring overly complex multi-layer structures or additional processing steps.
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 solution effectively reduces static electricity generation during the peeling process, enhancing the reliability and efficiency of flexible display device manufacturing by preventing damage to the organic light emitting diode.
Implementation Method 1
forming a separation layer on a support substrate; depositing amorphous indium tin oxide (a-ITO) on the support substrate; forming the separation layer to be 300 Å to 1100 Å thick
Implementation Method 2
controlling generation of static electricity; effectively reduces static electricity generation during the peeling process
Implementation Method 3
forming a photosensitive pattern on the separation layer; etching the separation layer using the photosensitive pattern as a mask
Implementation Method 4
etching the separation layer using the photosensitive pattern as a mask to form a support pattern corresponding to the photosensitive pattern and a plurality of separation patterns; using a dry etching method using an etchant adapted to remove the amorphous indium tin oxide
Data Source
AI summary
A flexible substrate includes: a flexible substrate main body including an organic material; a plurality of separation patterns distributed across one side of the flexible substrate main body; and a separation groove on the one side of the flexible substrate main body adjacent to at least one of the separation patterns, and the separation groove being recessed from a surface of the one side of the flexible substrate main body.