Atmospheric Plasma Diffusion Barrier for Optoelectronic Encapsulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current encapsulation techniques for optoelectronic components, such as OLEDs, are prone to pinholes and defects, leading to moisture ingress and damage, especially for large-area and thin components, and existing housing technologies are complex, costly, and inefficient.
Innovation Solution
A method involving the deposition of a diffusion barrier using atmospheric pressure plasma on the surface of optoelectronic components to create a dense, pinhole-free layer, which can be applied directly on the component under normal conditions, suitable for large-area and thin components, and can include multiple layers with varying thicknesses for enhanced tightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If common encapsulation techniques are used, then the optoelectronic component is protected to some extent, but pinholes or defects occur in the encapsulation layer leading to moisture ingress
Solution Approach 1:
The patent applies a multi-layer encapsulation structure combining organic encapsulation layers with inorganic diffusion barrier layers. This composite approach leverages the advantages of both material types: the organic layers provide flexibility and coverage while the inorganic layers provide pinhole-free diffusion protection, collectively achieving superior moisture barrier performance that neither layer could achieve alone.
Solution Approach 2:
The inorganic diffusion barrier layer acts as an intermediary between the optoelectronic component and the external environment. This intermediate layer specifically targets and blocks water and oxygen diffusion pathways, preventing harmful substances from reaching the sensitive organic components while allowing the encapsulation structure to remain flexible.
2Reliability
If housing technology with getters is used, then environmental protection is achieved, but the method is complicated and expensive
Solution Approach 1:
The patent extracts and eliminates the need for separate housing structures and getter materials by integrating the diffusion barrier function directly into the encapsulation layers of the optoelectronic component itself. This integration simplifies the overall structure by removing unnecessary intermediate components while maintaining protective functionality.
Solution Approach 2:
The patent merges the encapsulation and diffusion barrier functions into a single integrated multi-layer structure. By combining the protective encapsulation layers with the diffusion-blocking inorganic layers, the design achieves environmental protection without requiring separate housing and getter systems, thereby reducing structural complexity.
3Reliability
If housing technology is used, then environmental protection is provided, but the production cost increases significantly
Solution Approach 1:
The patent employs thin-film encapsulation layers that are cost-effective to produce at scale. The inorganic diffusion barrier layers can be deposited using conventional semiconductor manufacturing techniques that are already widely available, enabling cost-efficient mass production without requiring expensive specialized housing assemblies or getter materials.
Solution Approach 2:
The patent changes the scale and deposition parameters of the encapsulation layers to optimize for both performance and cost. By using thin-film deposition techniques with controlled layer thicknesses and leveraging existing manufacturing infrastructure, the solution achieves high protective performance at reduced production costs compared to traditional housing approaches.
4Length of moving object
If thin-film encapsulation is used, then the component remains thin, but the encapsulation layer contains pinholes and defects
Solution Approach 1:
The patent creates a composite encapsulation structure where thin organic encapsulation layers are combined with thin inorganic diffusion barrier layers. This composite approach maintains the overall thinness of the component while the inorganic layers provide pinhole-free protection, achieving both thinness and high manufacturing precision simultaneously.
Solution Approach 2:
The inorganic diffusion barrier layers are strategically positioned at critical interfaces where moisture ingress would be most harmful. By concentrating the high-precision barrier function at these specific locations rather than uniformly throughout the entire encapsulation structure, the design maintains thin overall dimensions while achieving superior local protection quality.
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 method provides a high level of environmental protection with improved tightness and cost-effectiveness, enabling the production of large-area and thin optoelectronic components without the limitations of traditional housing technologies.
Implementation Method 1
depositing a diffusion barrier to protect against environmental influences by means of an atmospheric pressure plasma on at least a partial area of the surface of the optoelectronic component
Implementation Method 2
depositing a diffusion barrier to protect against environmental influences by means of an atmospheric pressure plasma
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a method for encapsulating an optoelectronic component by depositing a diffusion barrier (12), which is used as protection from environmental influences, onto at least one partial region of the surface of the optoelectronic component using atmospheric-pressure plasma.