Copper-Nickel Oxide Conductive Structure for Touch Screens
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Solution Overview
Problem
Large-area touch screen panels face challenges in maintaining performance under heat resistance, salt water resistance, and high humidity environments while ensuring excellent visibility and etching properties of micropatterns, and existing solutions suffer from high electrode resistance and visibility issues due to reflectance and diffraction problems.
Innovation Solution
A conductive structure comprising a substrate with a metal layer and a light reflection reducing layer made of copper-nickel oxide, where the copper content is between 15 at% and 55 at%, nickel content is between 1 at% and 30 at%, and the nickel to copper ratio is between 0.01 and 1.8, which is applied using a method involving sputtering under an oxygen atmosphere to enhance durability and reduce reflectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal layer is used to ensure electrical conductivity, then conductivity is improved, but light reflectance increases causing visibility deterioration
Solution Approach 1:
A light reflection reducing layer comprising copper-nickel oxide is introduced as an intermediary between the metal layer and the external environment. This intermediate layer absorbs or reduces the light reflected by the metal layer, thereby maintaining the electrical conductivity of the metal layer while improving visibility by reducing the dazzle effect.
Solution Approach 2:
The patent uses a composite structure consisting of a metal layer and a copper-nickel oxide light reflection reducing layer. The copper-nickel oxide layer has specific compositional ratios (Cu: 15-55 at%, Ni: 1-30 at%) that provide both optical absorption properties to reduce reflectance and chemical stability to protect the underlying metal layer, thus resolving the contradiction between conductivity and visibility.
2Illumination intensity
If a light reflection reducing layer is added to improve visibility, then visibility is improved, but manufacturing complexity increases
Solution Approach 1:
The patent specifies precise compositional parameters for the copper-nickel oxide layer (Cu: 15-55 at%, Ni: 1-30 at%) to achieve the desired light reflection reducing effect. By controlling these compositional parameters within specific ranges, the patent optimizes the balance between visibility improvement and manufacturing feasibility, ensuring that the layer can be deposited using conventional sputtering techniques without excessive complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The conductive structure maintains excellent electrical conductivity, chemical and physical durability, and visibility by minimizing reflectance and diffraction, effectively preventing performance decline in harsh environments and improving visibility in touch screen panels and display devices.
Implementation Method 1
a light reflection reducing layer comprising a copper-nickel oxide provided on at least one surface of the metal layer
Implementation Method 2
applied using a method involving sputtering under an oxygen atmosphere
Data Source
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AI summary
The present specification relates to a conductive structure and a method for manufacturing the same.