OLED Fluorinated Epoxy Sealing for Moisture Barrier
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Solution Overview
Problem
Existing OLED devices face challenges in maintaining longevity due to moisture and oxygen penetration, especially in high-temperature and high-humidity environments, which affects their reliability and contamination levels.
Innovation Solution
The use of a fluorinated epoxy sealing material with an inorganic layer, applied through either thin film or can-type encapsulation methods, provides enhanced water-proofing and protection for the OLED device, including a primer layer for improved adhesion and a choice of materials like silicon nitride or glass for the encapsulation substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sealing materials are used in OLED devices, then the device structure is simple and manufacturing is easier, but the device lifespan is reduced due to moisture and oxygen penetration in high-temperature and high-humidity environments
Solution Approach 1:
The patent employs a composite sealing structure consisting of an inorganic layer (silicon oxide, silicon nitride, or aluminum oxide) combined with an organic sealing material (epoxy resin or polyimide). This composite approach leverages the moisture and oxygen barrier properties of inorganic materials while utilizing the adhesive and sealing capabilities of organic materials, thereby significantly improving device lifespan against environmental degradation without excessive structural complexity
Solution Approach 2:
The patent utilizes thin film encapsulation layers with controlled thickness (inorganic layer: 50-200 nm, organic layer: 1-5 μm) to provide effective barrier protection against moisture and oxygen penetration. These thin films achieve reliable sealing while maintaining device compactness and minimizing the impact on device lifespan
2Reliability
If conventional sealing materials are used in OLED devices, then the manufacturing process is simpler, but contamination increases due to insufficient water-proofing ability in high-temperature and high-humidity environments
Solution Approach 1:
The patent optimizes the thickness parameters of sealing layers (inorganic layer: 50-200 nm, organic layer: 1-5 μm) to achieve the optimal balance between barrier performance and manufacturing feasibility. By controlling these dimensional parameters, the patent enhances contamination resistance through improved water-proofing ability while maintaining ease of manufacture within standard fabrication capabilities
Solution Approach 2:
The patent applies sealing materials and forms encapsulation structures before the OLED device is exposed to high-temperature and high-humidity environments during operation or testing. This preliminary encapsulation prevents moisture and oxygen from reaching the organic light-emitting layers, thereby minimizing contamination from the outset rather than addressing it after damage occurs
3Object-affected harmful factors
If thicker sealing layers are used to improve water-proofing, then moisture and oxygen penetration is reduced, but the device size and structural complexity increase
Solution Approach 1:
The patent employs a composite sealing structure consisting of an inorganic layer (silicon oxide, silicon nitride, or aluminum oxide) combined with an organic sealing material (epoxy resin or polyimide). This composite approach leverages the moisture and oxygen barrier properties of inorganic materials while utilizing the adhesive and sealing capabilities of organic materials, thereby significantly improving device lifespan against environmental degradation without excessive structural complexity
Solution Approach 2:
The patent utilizes thin film encapsulation layers with controlled thickness (inorganic layer: 50-200 nm, organic layer: 1-5 μm) to provide effective barrier protection against moisture and oxygen penetration. These thin films achieve reliable sealing while maintaining device compactness and minimizing the impact on device lifespan
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 solution significantly improves the lifespan of OLED devices by minimizing contamination and ensuring effective sealing against moisture and oxygen, applicable to both small and large-area displays.
Implementation Method 1
The sealing member includes a fluorinated epoxy sealing material including a fluorinated epoxy resin
Implementation Method 2
The inorganic layer may include an inorganic material of silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, silicon oxynitride (SiON), or combinations thereof
Data Source
AI summary
Disclosed is an organic light emitting diode (OLED) device, which includes: an organic light emitting diode including a first electrode, a second electrode, and an emission layer interposed between the first electrode and the second electrode; a base substrate supporting the organic light emitting diode; and a sealing member disposed on the base substrate while covering the organic light emitting diode. Herein, the sealing member includes a fluorinated epoxy sealing material including a fluorinated epoxy resin.