Display Panel Backplane Electrode Protection Against Oxidation
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Solution Overview
Problem
The oxidation resistance of the driving backplane in display panels is inadequate, leading to oxidation of lead-out electrodes and affecting signal transmission, which is not effectively addressed by existing technologies.
Innovation Solution
Incorporating a first inorganic protective layer over the circuit layer of the driving backplane, exposing portions of the first electrode, and using anti-oxidation metal materials for the electrode, along with strategic via hole designs to protect the electrodes from oxidation and enhance connection stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driving backplane uses conventional protective layers, then the manufacturing process is simple, but the oxidation resistance of lead-out electrodes is insufficient
Solution Approach 1:
The patent applies composite material principle by using a multi-layer structure consisting of an inorganic protective layer (such as silicon nitride or silicon oxide) combined with an organic protective layer. This composite structure provides superior oxidation resistance compared to single-material layers, while the inorganic layer specifically addresses the electrode protection need and the organic layer provides additional environmental barrier.
Solution Approach 2:
The protective layer is segmented into multiple functional layers: an inorganic protective layer directly covering the lead-out electrode for oxidation prevention, and an organic protective layer on top for additional environmental protection. This segmentation allows each layer to perform its specific function optimally, with the inorganic layer providing chemical resistance and the organic layer providing mechanical and environmental protection.
2Reliability
If the lead-out electrode is fully exposed for connection, then the connection reliability is improved, but the electrode is more susceptible to oxidation
Solution Approach 1:
The patent applies local quality principle by providing differential protection: the inorganic protective layer covers the lead-out electrode in the non-display region to prevent oxidation, while connection holes are selectively formed to expose only the specific portions of the electrode needed for electrical connection. This localized exposure strategy maintains connection reliability while minimizing oxidation exposure by protecting all non-connection areas.
3Ease of manufacture
If conventional protective layers are used, then the manufacturing process is simple, but film peeling occurs during connection process
Solution Approach 1:
The composite structure of inorganic and organic protective layers provides enhanced adhesion and structural stability. The inorganic layer serves as a strong bonding interface to the electrode, while the organic layer provides mechanical protection. This multi-layer composite structure prevents film peeling during the connection process by distributing mechanical stresses across multiple layers with different mechanical properties.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a driving backplane and a connection member located on one side of the driving backplane. The driving backplane includes a substrate; a circuit layer over the substrate; a first film layer located on a side of the circuit layer away from the substrate, and a first inorganic protective layer located on a side of the first film layer away from the substrate. The first film layer includes a planarization layer and a first electrode layer, and the first electrode layer includes a first electrode; and at least a portion of the first electrode is exposed by the first inorganic protective layer, and the connection member is electrically connected to the first electrode.