Mesh-Patterned Touch Panel Oxide Interlayer for Corrosion Resistance
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Solution Overview
Problem
Existing touch panels with metal electrodes suffer from poor adhesion and environmental reliability due to corrosion, particularly when a mesh-patterned metal electrode layer and blackening layer are used, as evidenced by low adhesion ratios and significant corrosion after 240 hours.
Innovation Solution
Incorporating a transparent oxide layer, such as IZO or AZO, between the base layer and the metal electrode layer, and optionally on top of the blackening layer, to enhance adhesion and prevent corrosion, with specific thickness ranges to optimize performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal electrode layer with mesh structure and blackening layer is used, then resistance is reduced and reflectance is lowered, but adhesion is poor and environmental reliability deteriorates due to corrosion
Solution Approach 1:
An organic layer is introduced as an intermediary between the metal electrode layer and the blackening layer. This organic layer acts as a mediator that prevents direct contact between the metal and the blackening layer, thereby stopping the corrosion process while maintaining the electrical and optical functions of the electrode structure.
Solution Approach 2:
The patent creates a composite structure by combining the metal electrode layer, the organic layer, and the blackening layer into a multi-layered system. This composite material approach allows each layer to perform its specific function while working together to achieve both low resistance and corrosion resistance.
2Strength
If a metal electrode layer with mesh structure and blackening layer is used, then resistance is reduced and reflectance is lowered, but adhesion is poor
Solution Approach 1:
The organic layer serves as an adhesion promoter and intermediary that bonds the metal electrode layer to the blackening layer. This mediator layer improves interfacial adhesion strength, preventing delamination while the overall layer structure remains manageable through standard deposition techniques.
Data Source
AI summary
A mesh-patterned touch panel includes a base layer, a first transparent oxide layer formed on the base layer, a metal electrode layer formed on the first transparent oxide layer, and a blackening layer formed on the metal electrode layer.