Gradient Indium Transparent Conductive Layer Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increased metal content in transparent conductive oxides used in touch display devices reduces the adhesion of sensing electrodes to other units, leading to poor film forming ability and decreased conductivity.
Innovation Solution
A display device with a transparent conductive layer having a gradient distribution of indium (In) atomic content, where the In atomic amount is higher in the top zone than the bottom zone, improving adhesion and conductivity, and optionally including zinc (Zn) or tin (Sn) for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal content in transparent conductive oxides is increased to enhance conductivity, then conductivity is improved, but adhesion to other units deteriorates
Solution Approach 1:
The patent applies local quality by creating a transparent conductive layer with non-uniform metal content distribution. The metal content varies through the thickness of the layer, with higher metal content near the substrate and lower metal content toward the top surface. This gradient structure allows different regions of the same layer to serve different functions: the bottom region provides strong adhesion to the substrate while the top region maintains high conductivity and optical transparency.
Solution Approach 2:
The patent employs parameter changes by systematically varying the metal atomic content parameter through the thickness of the transparent conductive layer. By controlling the metal content to increase from the top surface toward the substrate interface, the patent optimizes both adhesion and conductivity simultaneously. This parameter gradient approach resolves the contradiction by allowing the layer to exhibit different effective properties at different locations.
2Reliability
If metal content in transparent conductive oxides is increased to enhance conductivity, then conductivity is improved, but film forming ability deteriorates
Solution Approach 1:
The patent applies local quality by creating a transparent conductive layer with non-uniform metal content distribution. The metal content varies through the thickness of the layer, with higher metal content near the substrate and lower metal content toward the top surface. This gradient structure allows different regions of the same layer to serve different functions: the bottom region provides strong adhesion to the substrate while the top region maintains high conductivity and optical transparency.
Solution Approach 2:
The patent employs parameter changes by systematically varying the metal atomic content parameter through the thickness of the transparent conductive layer. By controlling the metal content to increase from the top surface toward the substrate interface, the patent optimizes both adhesion and conductivity simultaneously. This parameter gradient approach resolves the contradiction by allowing the layer to exhibit different effective properties at different locations.
Data Source
AI summary
A display device having a first substrate with a first surface and a second surface opposite to the first surface; and a first patterned transparent conductive layer disposed on the first surface of the first substrate and having a first thickness, wherein the first patterned transparent conductive layer has at least a first zone and a second zone, the first zone locates between the second zone and the first substrate, and the first zone is a part of the first patterned transparent conductive layer neighboring to the first substrate and having a two-third (⅔) thickness of the first patterned transparent conductive layer, wherein a material of the first patterned transparent conductive layer incldues In, and an atomic amount of In in the second zone is larger than that in the first zone.