OLED Pixel Definition Layer via Metal Oxidation
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Solution Overview
Problem
The manufacturing process of top-emission OLED display panels is complex and costly due to the use of organic materials for the pixel definition layer, which requires a large quantity of organic solvents and increases environmental pollution.
Innovation Solution
The method involves forming metal pixel definition layer transition patterns and oxidizing them to create an insulative inorganic pixel definition layer, reducing the need for organic materials and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If organic materials are used for the pixel definition layer, then the manufacturing process can be completed, but the production cost increases and environmental pollution worsens due to large quantity of organic solvents required
Solution Approach 1:
The patent changes the material parameter of the pixel definition layer from organic material to inorganic metal oxide material. This fundamental material parameter change eliminates the need for organic solvents in the manufacturing process, thereby reducing environmental pollution while maintaining manufacturing feasibility through established metal oxide formation processes
Solution Approach 2:
The patent employs a metal layer that can be readily oxidized to form the pixel definition layer. The metal layer serves as a temporary precursor that is converted to the final metal oxide form, eliminating the need for persistent organic materials and their associated solvents, thus reducing environmental impact
2Ease of manufacture
If organic materials are used for the pixel definition layer, then the pixel definition layer can be formed, but the production cost increases
Solution Approach 1:
The patent changes the material composition parameter from organic to inorganic (metal oxide), which fundamentally alters the manufacturing approach. Instead of applying and curing organic materials requiring solvents, the process uses metal deposition followed by oxidation, eliminating solvent usage and associated costs
Solution Approach 2:
The patent replaces the chemical process of organic material application and solvent evaporation with a physical/chemical process of metal deposition and oxidation. This substitution eliminates the need for organic solvents and their associated handling, storage, and disposal costs
3Object-affected harmful factors
If metal layer is oxidized to form pixel definition layer, then environmental pollution is reduced, but additional oxidation process is required
Solution Approach 1:
The patent combines the pixel definition layer formation with the anode structure by using the same metal layer for both purposes. The metal layer serves dual functions as both the anode material and the pixel definition layer precursor, merging two manufacturing steps into one integrated process
Solution Approach 2:
The patent utilizes the oxidation state change of metal as a controllable parameter to differentiate between the anode region and pixel definition layer region. By controlling oxidation conditions and patterns, the process achieves both anode formation and pixel definition in an integrated manner
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 reduces production costs, minimizes environmental pollution by decreasing organic solvent usage, and simplifies the manufacturing process while maintaining high efficiency in OLED display substrate production.
Implementation Method 1
oxidizing the pixel definition layer transition patterns to form an insulative pixel definition layer
Data Source
AI summary
The present disclosure relates to the display technology, and provides an OLED display substrate, a method for manufacturing the OLED display substrate and a display device. The method includes: forming pixel definition layer transition patterns with metal; and oxidizing the pixel definition layer transition patterns to form an insulative pixel definition layer.