Surfactant-Modified Lower Layer for Uniform Organic EL Lamination
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Solution Overview
Problem
Inkjet methods for manufacturing organic electroluminescence displays face issues with uniformity of the organic EL layer due to low wettability of droplets, leading to non-uniform film thickness and productivity concerns, especially when the lower layer pattern has low plasma resistance and requires plasma treatment.
Innovation Solution
Incorporating a surfactant with both hydrophilic and lipophilic functional groups into the lower layer pattern to improve wettability of upper layer droplets, eliminating the need for surface treatments and enhancing the uniformity and productivity of the laminated pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the lower layer pattern is subjected to plasma treatment to improve wettability, then the uniformity of the laminated pattern is improved, but the productivity decreases due to additional processing steps
Solution Approach 1:
The surfactant is incorporated into the lower layer pattern during the initial formation process, so that the wettability improvement function is already present before the upper layer droplets are discharged. This eliminates the need for subsequent plasma treatment steps while maintaining uniform lamination.
Solution Approach 2:
The surfactant acts as an intermediary substance between the lower layer pattern and the upper layer droplets. It mediates the interaction by improving wettability, allowing the droplets to spread uniformly without requiring plasma treatment of the lower layer.
2Manufacturing precision
If the lower layer pattern is subjected to plasma treatment to improve wettability, then the shape uniformity of the organic EL layer is improved, but the lower layer pattern with low plasma resistance is damaged
Solution Approach 1:
The surfactant is added to the lower layer pattern during its formation, so that the wettability enhancement is already in place before the upper layer is applied. This preliminary action eliminates the need for plasma treatment that would damage the low plasma resistance material.
Solution Approach 2:
The surfactant serves as an intermediary that provides the necessary wettability improvement without requiring plasma treatment. This protects the lower layer pattern from damage while still achieving uniform droplet distribution and shape uniformity.
3Stability of the object's composition
If material with low wettability is selected for the upper layer pattern to prevent dissolution, then the lower layer pattern must undergo plasma treatment, increasing process complexity
Solution Approach 1:
The surfactant is incorporated into the lower layer pattern during its formation, so that wettability improvement is already present before the upper layer droplets are discharged. This eliminates the need for plasma treatment steps while maintaining the material selection requirements for preventing dissolution.
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 surfactant ensures uniform lamination of the upper layer over the lower layer without additional surface treatments, improving the shape uniformity and productivity of the organic electroluminescence display.
Implementation Method 1
the wettability of the discharged droplets be improved... the lower layer pattern contains a surfactant that is lyophilic with respect to the droplets that form the upper layer pattern
Data Source
AI summary
A patterned substrate has a laminated pattern having laminating patterns formed by drying droplets containing a pattern formation material. A lower layer pattern contains a surfactant that is lyophilic with respect to droplets that form an upper layer pattern.