Display Substrate Insulating Pattern for Contact Resistance
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Solution Overview
Problem
In display substrates, the existing insulating patterns cover both hollow areas and the space between them, leading to reduced contact area between conductive patterns, increased resistance, and poor display effects due to voltage drop and uneven brightness.
Innovation Solution
A display substrate design with a first conductive pattern having hollow areas as alignment marks, an insulating layer that does not completely cover the space between adjacent hollow areas, and a second conductive pattern electrically connected to the first, enhancing contact area and reducing resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insulating pattern covers both hollow areas and the space between them, then the insulation effect is improved, but the contact area between conductive patterns is reduced
Solution Approach 1:
The insulating pattern is designed with varying coverage: it completely covers the hollow areas (which require insulation to prevent oxidation) but intentionally leaves gaps between adjacent hollow areas. This local differentiation allows the insulating layer to provide protection where needed while preserving conductive contact areas where electrical connection is required, thus resolving the contradiction between insulation effectiveness and contact area maintenance.
2Object-affected harmful factors
If the insulating pattern covers the space between hollow areas, then oxidation protection is improved, but contact resistance increases
Solution Approach 1:
The insulating pattern applies protection selectively: hollow areas are fully covered to prevent oxidation of the conductive material, while the spaces between hollow areas remain uncovered to maintain low-resistance electrical contact. This localized application strategy resolves the contradiction by providing oxidation protection only where it is necessary, without compromising electrical connectivity.
Solution Approach 2:
The design accepts that complete coverage would provide maximum oxidation protection but converts the potential harm of reduced contact area into a benefit by strategically leaving gaps. The uncovered regions between hollow areas, which might seem to reduce insulation effectiveness, actually serve the beneficial purpose of maintaining electrical contact paths, thus converting what would be a harmful reduction in insulation into a useful preservation of electrical connectivity.
3Ease of manufacture
If the insulating layer completely covers the first conductive pattern, then manufacturing simplicity is improved, but display uniformity deteriorates
Solution Approach 1:
Rather than applying a uniform insulating layer across the entire conductive pattern, the design implements localized coverage that varies by region. The hollow areas receive complete coverage for oxidation protection, while inter-hollow areas remain exposed for electrical contact. This non-uniform but strategically differentiated approach maintains manufacturing feasibility while ensuring uniform display performance through proper electrical connectivity.
Data Source
AI summary
Embodiments of the present disclosure provide a display substrate, a method for manufacturing the same, and a display device, and relate to the field of display technology. The contact area between a first conductive pattern and a second conductive pattern may be increased. The display substrate includes a display area and a peripheral area surrounding the display area. The peripheral area includes a first conductive pattern including at least two first hollow areas as alignment marks, an insulation layer disposed on the first conductive pattern, the insulation layer including a first insulating pattern, the first insulating pattern covering the first hollow area, and the first insulating pattern being incompletely covering space between adjacent first hollow areas, a second conductive pattern disposed on the insulating layer, the second conductive pattern penetrating through the hollow area on the first insulating pattern and electrically connected to the first conductive pattern.