Transparent Conductive Laminate with Integrated Conductive Line
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Solution Overview
Problem
Transparent conductive films, such as those made from ITO and ZnO, suffer from low conductivity and increased surface roughness due to auxiliary electrodes, leading to issues with post-processing and reduced efficiency in electronic devices.
Innovation Solution
A transparent conductive laminate is developed with transparent conductive patterns and a conductive line on the same substrate, where the conductive line contacts the patterns, reducing sheet resistance and surface steps, and enhancing electrical conductivity and light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an auxiliary electrode is formed on a transparent conductive film to improve conductivity, then electrical conductivity is improved, but surface roughness and surface step are increased
Solution Approach 1:
The patent merges the auxiliary electrode function with the transparent conductive film by forming the auxiliary electrode from the same transparent conductive material (ITO) and integrating it into the same layer structure. This eliminates the need for separate auxiliary electrodes made from different materials that would create surface steps, while still achieving the desired conductivity enhancement through patterned transparent conductive layers.
2Reliability
If a metal pattern auxiliary electrode is formed to improve conductivity, then electrical conductivity is improved, but post-processing coating is hindered
Solution Approach 1:
The patent changes the material parameter of the auxiliary electrode from metal to transparent conductive oxide (ITO), and changes the structural parameter by forming it as an integrated layer rather than a separate component. This maintains the conductivity function while creating a smooth surface that is compatible with subsequent coating processes, as the entire structure has uniform material properties and surface characteristics.
3Reliability
If transparent conductive film thickness is increased to improve conductivity, then electrical conductivity is improved, but light transmittance is reduced
Solution Approach 1:
The patent segments the conductive function into multiple thin transparent conductive layers rather than using a single thick layer. The first transparent conductive layer is patterned to form main conductive paths, while the second transparent conductive layer fills the spaces between patterns to provide additional conductivity. This segmented approach achieves enhanced overall conductivity while maintaining low thickness in each layer, thereby preserving light transmittance.
Data Source
AI summary
Provided are a transparent conductive laminate, a transparent electrode including the transparent conductive laminate, and a manufacturing method for the transparent conductive laminate.