Conductive Member with Nanowires and Light-Scattering Layer
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Solution Overview
Problem
Conductive materials like ITO face issues with indium metal scarcity, high haze values, low durability under humidity and temperature, and visible electrode patterns in display devices, while alternative metal nanowires struggle with insulation failure and pattern visibility.
Innovation Solution
A conductive member is created with a conductive layer of metal nanowires and a light-scattering layer of insulating fine particles, where the haze ratio between the two layers is controlled to minimize pattern visibility and prevent insulation failure, using a specific matrix and manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal nanowires are used as conductive material, then transparency and low resistance are improved, but haze value increases and durability under high humidity and temperature deteriorates
Solution Approach 1:
The patent uses composite materials by combining metal nanowires with a corrosion inhibitor layer and an insulating layer. This composite structure maintains the excellent conductive properties and transparency of metal nanowires while adding protection against corrosion and reducing haze, thereby improving overall durability and optical quality
Solution Approach 2:
The patent applies parameter changes by controlling the thickness and composition of the corrosion inhibitor layer and insulating layer. By optimizing these parameters, the patent achieves a balance between maintaining low resistance (conductive performance) and reducing haze value while improving durability under high humidity and temperature conditions
2Ease of operation
If transparent electrode is patterned in display apparatus, then electrode function is achieved, but haze difference between conductive and non-conductive sections causes pattern visibility
Solution Approach 1:
The patent applies local quality by creating different layer configurations in different regions. The corrosion inhibitor layer and insulating layer are selectively formed in non-conductive sections while metal nanowires are present in conductive sections. This local differentiation reduces the haze difference between conductive and non-conductive areas, making the electrode pattern less visible while maintaining proper electrode functionality
3Object-affected harmful factors
If conductive nanofiber is forcibly oxidized to insulate it, then environment resistance is improved, but insulation failure occurs due to electrochemical migration
Solution Approach 1:
The patent uses an intermediary approach by introducing a corrosion inhibitor layer between the metal nanowires and the environment. This intermediate layer prevents direct oxidation and electrochemical migration by acting as a protective barrier, thereby improving environment resistance without compromising insulation stability. The subsequent insulating layer further enhances this protection
Solution Approach 2:
The patent applies preliminary action by forming the corrosion inhibitor layer before the nanowires are exposed to harsh environments. This pre-formed protective layer prevents electrochemical migration and oxidation from occurring in the first place, maintaining insulation stability while providing environment resistance
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 solution provides a conductive member with favorable conductivity and transparency, reducing pattern visibility and insulation failure, and enhancing durability in touch panels and display apparatus.
Implementation Method 1
a light-scattering layer including insulating light-scattering fine particles
Data Source
AI summary
A method for manufacturing of a conductive member includeforming one of a conductive layer including metal nanowires or a light-scattering layer including insulating light-scattering fine particles on a substrate in a pattern shape; andforming the other of the conductive layer including metal nanowires or the light-scattering layer including insulating light-scattering fine particles on a space of the substrate wherein the one of the conductive layer or the light-scattering layer is not formed.