OLED Substrate Adhesive Strength Segmentation for Bendable Display Fabrication
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Solution Overview
Problem
Conventional methods for fabricating OLED display panels with narrow frames are complicated and result in low yield due to the difficulty in removing protective layers without damaging the substrate, leading to inefficient production processes.
Innovation Solution
A method involving the formation of a first protective layer with distinct adhesive portions, where a third adhesive portion with lower strength is selectively removed to create a bendable portion, allowing the substrate to be bent and reducing the need for a frame, using ultraviolet light and a mask plate to differentiate adhesive strengths and simplify the removal process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods are used to remove protective layers, then the protective layer can be removed, but the substrate is damaged and yield is low
Solution Approach 1:
The protective layer is divided into multiple adhesive portions with different adhesive strengths. The first adhesive portion has strong adhesion to remain on the substrate, while the second adhesive portion has weak adhesion to be easily removed. This segmentation allows selective removal without damaging the substrate.
Solution Approach 2:
Different regions of the protective layer are given different local properties through varying adhesive strengths. The first adhesive portion maintains strong bonding in areas requiring protection, while the second adhesive portion has reduced adhesion in areas intended for removal, enabling precise control over which portions are removed.
2Ease of manufacture
If the protective layer is completely removed, then the substrate can be accessed, but the process is complicated and yield is low
Solution Approach 1:
The protective layer is pre-treated to create distinct adhesive portions with different removal characteristics before the actual removal process. This preliminary differentiation of adhesive strengths simplifies the subsequent removal operation, allowing operators to easily remove only the intended portions without complex procedures.
3Strength
If adhesive strength is increased to secure the protective layer, then protection is improved, but removal becomes difficult and damages substrate
Solution Approach 1:
The adhesive layer is segmented into regions with different adhesive strengths. The first adhesive portion maintains strong adhesion for secure protection, while the second adhesive portion has weak adhesion for easy removal, resolving the contradiction between protection strength and removal ease.
Solution Approach 2:
The adhesive strength parameter is varied across different portions of the protective layer. By changing the adhesive strength parameter from high in the first portion to low in the second portion, the system achieves both strong protection where needed and easy removal where intended.
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 simplifies the fabrication process, increases production yield, and enables the creation of OLED display panels with narrower frames by accurately forming and removing adhesive portions, improving the efficiency and accuracy of substrate bending.
Implementation Method 1
treating the first protective layer comprises exposing a first portion of the first protective layer with ultraviolet light, thereby forming the first adhesive portion; and exposing a second portion of the first protective layer with the ultraviolet light, thereby forming the second adhesive portion
Data Source
AI summary
A method of fabricating a display panel is provided. The method includes providing a substrate including a plurality of light emitting elements; forming a first protective layer on a side of the substrate; treating the first protective layer to obtain a first adhesive portion, a second adhesive portion, and a third adhesive portion, the third adhesive portion having an adhesive strength smaller than an adhesive strength of the first adhesive portion, and smaller than an adhesive strength of the second adhesive portion; and removing the third adhesive portion from the substrate to form a bendable portion of the substrate. The bendable portion of the substrate spaces apart a first portion of the substrate from a second portion of the substrate.