Adhesive Layer Configuration for Organic Thin Film Transistor Migration Resistance
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Solution Overview
Problem
Existing organic thin film transistor arrays face challenges with electrochemical migration and organic semiconductor material degradation, particularly when using Ag materials, which can lead to increased fabrication costs when using barrier layers or metallic materials with high electrochemical migration resistance.
Innovation Solution
The proposed image display panel incorporates a specific adhesive layer configuration, including a first adhesive outside the second adhesive between the image display medium and conductive layer, with hydrophilic treatment on the gate insulating film, to enhance migration resistance and protect the organic semiconductor layer without increasing fabrication costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If Ag materials are used for wiring patterns in organic thin film transistor arrays, then fabrication cost is reduced and conductivity is improved, but electrochemical migration resistance deteriorates
Solution Approach 1:
A resin layer with specific properties (volume resistance of 10^8 to 10^12 Ω·cm) is introduced as an intermediary between the Ag wiring pattern and the environment. This resin layer acts as a mediator that prevents electrochemical migration while allowing the Ag material to maintain its low cost and high conductivity advantages, thus resolving the contradiction between fabrication cost and migration resistance.
Solution Approach 2:
The invention changes the parameter of volume resistance of the resin layer to a specific range (10^8 to 10^12 Ω·cm) to optimize both cost and performance. By controlling this parameter, the system achieves adequate migration resistance without requiring expensive alternative materials, thus resolving the contradiction between fabrication cost and electrochemical migration resistance.
2Reliability
If inorganic barrier layers are formed to prevent moisture intrusion and electrochemical migration, then reliability is improved, but fabrication cost increases
Solution Approach 1:
The invention uses a resin layer that is cheaper than inorganic barrier layers to achieve the protection function. Although the resin layer has shorter-term stability compared to inorganic barriers, it provides adequate protection against electrochemical migration at lower cost, thus resolving the contradiction between reliability and fabrication cost.
Solution Approach 2:
The invention changes from using inorganic barrier layers to using an organic resin layer with specifically controlled volume resistance (10^8 to 10^12 Ω·cm). This parameter change allows the system to achieve migration resistance through a lower-cost material, resolving the contradiction between reliability and fabrication cost.
3Reliability
If barrier layers are formed to protect organic semiconductor materials from oxidation and deterioration, then reliability is improved, but fabrication cost increases
Solution Approach 1:
The resin layer serves multiple functions simultaneously: it provides electrical insulation, prevents electrochemical migration, and protects the organic semiconductor material from environmental degradation. This multi-functionality eliminates the need for separate barrier layers, thus resolving the contradiction between reliability and fabrication cost.
Solution Approach 2:
The invention uses a cost-effective resin layer instead of expensive inorganic barrier layers to protect the organic semiconductor material. The resin layer provides adequate protection against oxidation and deterioration while maintaining lower fabrication costs, thus resolving the contradiction between reliability and fabrication cost.
4Power
If nano-metal ink with high Ag content is used for wiring patterns, then conductivity is improved and fabrication cost is reduced, but susceptibility to ion migration increases
Solution Approach 1:
The resin layer with specific volume resistance acts as an intermediary that isolates the high-conductivity Ag wiring pattern from environmental factors that cause ion migration. This allows the Ag material to maintain its superior conductivity while the resin layer prevents ion migration, thus resolving the contradiction between power (conductivity) and reliability.
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
This configuration effectively suppresses electrochemical migration and degradation of the organic semiconductor layer, improving the reliability and performance of the image display panel while maintaining cost-effectiveness.
Implementation Method 1
Electrochemical migration is a phenomenon where metal is deposited in the form of dendrites between electrodes as a result of voltage being applied between the electrodes under a high-humidity environment
Implementation Method 2
a first adhesive forms bonding between an inorganic film on which a second substrate is placed and a gate insulating film having a hydrophilic treatment
Data Source
AI summary
An image display panel includes a gate electrode; a gate insulating film over the gate electrode; a source electrode, a drain electrode, and a first adhesive on the gate insulating film; an organic semiconductor layer on the source and drain electrodes including a space; an interlayer insulating film covering the gate insulating film, source electrode, organic semiconductor layer, and part of the drain electrode; a conductive layer on the interlayer insulating film; a second adhesive formed over the interlayer insulating film and conductive layer; an image display medium on the second adhesive; an inorganic film on the image display medium and first adhesive; and a second substrate on the inorganic film, where the first adhesive is arranged outside the second adhesive between the display medium and the conductive layer, and forms bonding between the inorganic film and the gate insulating film having a hydrophilic treatment formed on the first substrate.