Display Panel Wire Spacing Layout for Dry Film Adhesion
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Solution Overview
Problem
The reliability of wiring on the side/back surfaces of display panels, particularly in Micro LED displays, is compromised due to the propensity of patterned dry films to detach during the removal of supporting films, affecting product yield.
Innovation Solution
The display panel design features a substrate with first and second surfaces, where the maximum distance between adjacent wires in the first division is greater than in the second division, increasing the area of the patterned dry film attached to the panel, thereby reducing the risk of detachment and improving yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distance between adjacent first wires is increased in the first division, then the area of the patterned dry film attached to the display panel is increased, but the wiring density is reduced
Solution Approach 1:
The second surface of the substrate is divided into a first division and a second division, with different wire spacing configurations in each division. This segmentation allows different regions to serve different functions: the first division prioritizes adhesion reliability with larger spacing, while the second division maintains wiring density with smaller spacing.
Solution Approach 2:
Different regions of the substrate surface are assigned different wire spacing characteristics. The first division has larger maximum distance H1 between adjacent wires to ensure patterned dry film adhesion, while the second division has smaller maximum distance H2 to maintain wiring density. This local differentiation resolves the contradiction between adhesion reliability and wiring density.
2Reliability
If the area of the patterned dry film attached to the display panel is increased, then the risk of detachment during supporting film removal is reduced, but the manufacturing complexity is increased
Solution Approach 1:
The substrate surface is segmented into first and second divisions with different wire spacing, allowing the patterned dry film to have varying attachment areas in different regions. This segmentation increases detachment resistance in critical areas while keeping the overall manufacturing process manageable through systematic regional differentiation.
Solution Approach 2:
The manufacturing process applies local quality by implementing different wire spacing configurations in different divisions of the substrate. The first division uses larger spacing to maximize patterned dry film attachment area and detachment resistance, while the second division uses smaller spacing. This localized approach balances reliability improvement with manufacturing complexity management.
Data Source
AI summary
A display panel, a method for manufacturing the display panel, a display screen, and a display device are provided. The display panel includes a substrate and multiple first wires. The substrate includes a first surface and a second surface that are opposite. The first surface faces a display face of the display panel. The multiple first wires are arranged on a side of the first surface away from the second surface. The second surface includes a first division and a second division. A maximum distance between adjacent first wires in the first division is H1, and a maximum distance between adjacent first wires in the second division is H2. H1 is greater than H2. The distance between adjacent first wires in the first division is increased to be greater than the distance between adjacent first wires in the second division.