OLED Display Panel Isolation Structure for High-Resolution Adhesion
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Solution Overview
Problem
The existing manufacturing process of organic light emitting diode display panels faces issues with peeling of the isolation structure from the substrate due to poor adhesion, which is exacerbated by the need for narrower isolation structures to achieve high-resolution displays.
Innovation Solution
The design involves a first isolation structure with through holes and a second isolation structure laminated on top, filling these holes, enhancing adhesion by using inorganic or organic materials for the first and second isolation structures respectively, and optimizing their dimensions and orientations to prevent peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the width of the isolation structure is decreased to achieve high-resolution display, then the resolution is improved, but the adhesion between the isolation structure and substrate deteriorates, leading to peeling
Solution Approach 1:
The patent applies the nesting principle by placing a second isolation structure inside and filling the through-holes of the first isolation structure. This nested configuration allows the thinner first isolation structure to maintain structural integrity while the second isolation structure provides additional adhesion to the substrate, resolving the contradiction between reduced width for high resolution and sufficient adhesion to prevent peeling
Solution Approach 2:
The patent employs composite materials by using different materials for the first and second isolation structures. The first isolation structure can be made from inorganic materials (such as silicon oxide or silicon nitride) while the second isolation structure uses organic materials (such as photoresist). This material differentiation allows each layer to contribute its specific properties - the inorganic layer provides structural stability at reduced width while the organic layer enhances adhesion to the substrate
2Manufacturing precision
If the width of the isolation structure is decreased to achieve high-resolution display, then the resolution is improved, but the isolation structure becomes more prone to peeling from the substrate
Solution Approach 1:
The nested configuration of the second isolation structure within the through-holes of the first isolation structure creates a mechanically interlocked system. This nesting provides multiple attachment points to the substrate, significantly reducing the peeling risk even when the overall isolation structure width is reduced for high-resolution requirements
Solution Approach 2:
The patent addresses the peeling risk by transitioning from a single-layer planar structure to a multi-layer vertical structure. The second isolation structure adds a vertical dimension of adhesion, filling the through-holes to create anchoring points that distribute stress and prevent peeling, thereby enabling reduced width without compromising structural reliability
Data Source
AI summary
A display panel includes a substrate, a first isolation structure, a second isolation structure and a plurality of light emitting structures. The first isolation structure is disposed on the substrate and includes a plurality of through holes. The second isolation substrate is laminated on the first isolation substrate and fills up the plurality of through holes of the first isolation substrate. The plurality of light emitting structures are disposed on the substrate and are isolated from each other via the second isolation structure.