Flexible Display Oxide and Insulating Layers Moisture Barrier
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Solution Overview
Problem
Conventional flexible electronic devices with glass substrates are prone to oxidation and damage when bent multiple times due to inadequate moisture and gas blocking, leading to instability and reliability issues.
Innovation Solution
A flexible display device design featuring a supporting substrate, a first flexible substrate, an oxide layer, a first insulating layer, a light emitting unit, and a protective layer, where the oxide layer and insulating layers effectively block moisture and gas, enhancing the device's durability and reliability through the use of silicon oxide and silicon nitride materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible substrate is used instead of glass substrate, then flexibility and deformability are improved, but moisture and gas blocking capability deteriorates
Solution Approach 1:
The patent employs a composite structure consisting of a flexible substrate combined with multiple protective layers including an oxide layer and an insulating layer. This composite material approach allows the device to maintain flexibility while achieving effective moisture and gas blocking capabilities that a single flexible substrate cannot provide alone.
Solution Approach 2:
The patent uses thin film structures (oxide layer and insulating layer) deposited on the flexible substrate to provide protective functions. These thin films create effective barriers against moisture and gas penetration while maintaining the overall flexibility of the device, allowing it to be bent and deformed without compromising protection.
2Reliability
If multiple protective layers are added to block moisture and gas, then reliability is improved, but device complexity increases
Solution Approach 1:
The insulating layer in the patent serves multiple functions simultaneously: it provides electrical insulation, acts as a barrier against moisture and gas penetration, and contributes to the overall structural integrity of the device. This multi-functionality reduces the need for separate dedicated layers, thereby limiting the increase in device complexity while still improving reliability.
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 significantly improves the stability and reliability of flexible electronic devices by preventing oxidation and damage from moisture and gas, allowing them to withstand multiple bending cycles without failure.
Implementation Method 1
the oxide layer is disposed on the first flexible substrate... The first insulating layer is disposed on the oxide layer... general flexible substrate cannot effectively block moisture or gas (oxygen), so circuit formed on the flexible substrate is easily oxidized
Data Source
AI summary
A display device is provided and includes a supporting substrate, a first flexible substrate, an oxide layer, a first insulating layer, a light emitting unit, and a protective layer. The first flexible substrate is disposed on the supporting substrate, and the oxide layer is disposed on the first flexible substrate. The first insulating layer is disposed on the oxide layer, and in a cross-sectional view, the first insulating layer has at least one opening. The light emitting unit is disposed on the first insulating layer, the protective layer is disposed on the light emitting unit, and at least a portion of the protective layer is disposed in the at least one opening.