Conductive Adhesive Sheet for Transparent Electrodes
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Solution Overview
Problem
Conventional transparent adhesives lack electrical conductivity and are costly due to metal particles, limiting their use in applications requiring both transparency and conductivity, such as solar cells and touch screens.
Innovation Solution
An adhesive sheet with a nano-wire-based adhesive layer and a grid electrode, using conductive metals or metal oxides, achieving high light transmittance, surface conductivity, and strong adhesion at a lower manufacturing cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal particles are used to provide conductivity, then electrical conductivity is improved, but manufacturing cost increases and light transparency deteriorates
Solution Approach 1:
The patent replaces expensive metal particles with conductive flakes that are more cost-effective, achieving conductivity without the high manufacturing costs associated with traditional metal-based conductive adhesives
Solution Approach 2:
The patent changes the physical parameters of the conductive filler by using flakes with specific aspect ratios and sizes, optimizing the balance between conductivity, transparency, and cost by controlling the density and distribution of conductive elements
2Reliability
If metal particles are used to provide conductivity, then electrical conductivity is improved, but light transparency deteriorates
Solution Approach 1:
The patent applies local quality by using conductive flakes with specific aspect ratios and orientations that concentrate conductivity in certain directions while maintaining transparency in others, allowing the adhesive to have different properties in different directions
Solution Approach 2:
The patent optimizes the size, shape, and distribution parameters of conductive flakes to achieve the right balance between conductivity and transparency, using controlled densities that prevent light blocking while ensuring sufficient electrical conduction
3Reliability
If conductive flakes are added to resin, then electrical conductivity is improved, but uniformity deteriorates due to density differences
Solution Approach 1:
The patent uses composite materials by combining conductive flakes with specifically formulated resin systems that match densities and promote uniform distribution, creating a homogeneous conductive adhesive composition
Solution Approach 2:
The patent modifies the physical parameters of both the conductive flakes and resin to match densities and optimize mixing characteristics, ensuring uniform distribution of conductive elements throughout the adhesive matrix
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 adhesive sheet provides excellent adhesion, transparency, and conductivity while maintaining low manufacturing costs, suitable for applications like solar cells, display devices, and touch screens, with light transmittance greater than 60% and surface resistance less than 1000Ω/□.
Implementation Method 1
an adhesive layer including a nano-wire
Implementation Method 2
an adhesive sheet comprising an adhesive layer including a nano-wire
Data Source
AI summary
The present invention relates to an adhesive sheet. As the adhesive sheet of one embodiment of the present invention retains the properties of conventional adhesive sheet, such as excellent adhesion and durability in high temperature and humidity environment, it can be utilized for manufacturing large-scale electrodes at low prices, and the electrodes manufactured above can be used for various applications such as solar cell, display, and touch panel.