OLED Display Panel Peripheral Layout to Prevent Metal-Residue Shorts
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Solution Overview
Problem
The integration of a touch structure on an encapsulation layer of an OLED display panel leads to short-circuiting defects in the peripheral region, reducing the yield of the display panel due to metal residue formation during the fabrication of metal structures.
Innovation Solution
A display panel design that eliminates the second organic insulating layer in the transition region, ensuring direct contact between metal structures and avoiding metal residue formation by etching it during the patterning of the second metal structure, thereby preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a second organic insulating layer is provided in the transition region, then metal structures are isolated and short circuits are prevented, but metal residue forms during fabrication reducing yield
Solution Approach 1:
The patent removes the second organic insulating layer specifically from the transition region while maintaining it in other areas. This selective extraction eliminates the source of metal residue formation during fabrication, thereby improving manufacturing yield without completely sacrificing the insulation function elsewhere in the device
Solution Approach 2:
The patent applies different structural configurations to different regions: the transition region has no second organic insulating layer to prevent metal residue, while other regions maintain the full insulating structure for electrical isolation. This local differentiation resolves the contradiction by optimizing each region for its specific functional requirements
2Productivity
If the organic insulating layer is eliminated in the transition region, then metal residue is avoided during patterning, but electrical isolation between metal structures is compromised
Solution Approach 1:
The patent maintains the second organic insulating layer in regions where electrical isolation is critical, while selectively removing it only from the transition region where metal residue formation occurs. This localized approach preserves electrical isolation functionality where needed while eliminating the harmful effect where it occurs
Solution Approach 2:
The patent introduces a spacing structure (such as a dielectric layer or physical gap) in the transition region to provide electrical isolation between metal structures in place of the removed organic insulating layer, thereby maintaining isolation functionality through an alternative mechanism
Data Source
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AI summary
The present invention provides a display panel and a display apparatus. The display panel comprises: a substrate, the substrate comprising a display area and a peripheral area, and the peripheral area comprising a binding area and a transition area located between the binding area and the display area; a source/drain metal layer, which comprises a binding part at least located in the binding area and a connecting part located in the transition area; a planarization layer, which is provided on the substrate and is provided with a first opening located in the binding area and a first via located in the transition area, respectively; a first organic insulation layer, which is provided on the side of the planarization layer away from the substrate and is provided with a third via corresponding to the first via; a first metal structure, which is located in the peripheral area and is at least provided on the side of the first organic insulation layer away from the substrate, the orthographic projection of the first metal structure on the substrate at least covering the first opening and the first via; and a second metal structure, which is provided on the side of the first metal structure away from the substrate and is in contact with the first metal structure. According to the display panel provided by the present invention, the problem of short circuiting caused by metal residue during process manufacturing can be solved, and product yield is increased.