Multimeric Dyes for Thermal Stability in Colored Dielectric Polymers
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Solution Overview
Problem
Conventional colored dielectric polymer materials used in electronic devices are prone to color degradation during high-temperature processing steps, such as the deposition of indium tin oxide films, which affects the stability and performance of next-generation display technologies.
Innovation Solution
The development of multimeric dyes with covalently linked chromophores, specifically tethered dye molecules such as dimers, trimers, or tetramers, which exhibit improved stability and maintain excellent coloration properties even under high-temperature annealing conditions, are incorporated into colored dielectric polymer materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional monomeric dyes are used in colored dielectric polymer materials, then the manufacturing process is simpler, but the color stability deteriorates during high-temperature processing steps
Solution Approach 1:
The dye molecule is segmented into multiple chromophore units (n=1-3) that are covalently linked but isolated from each other by non-conjugated bridging groups. This segmentation allows each chromophore to maintain its individual color properties while the multimeric structure provides enhanced thermal stability during high-temperature processing steps like indium tin oxide deposition
Solution Approach 2:
The patent creates a composite dye structure by combining multiple chromophore units with non-conjugated bridging groups (alkylene, alkenylene, or ring systems) to form multimeric dyes. This composite structure integrates the coloration properties of individual chromophores while adding thermal stability through the multimeric architecture, resolving the contradiction between manufacturing simplicity and color stability
2Ease of manufacture
If conventional dyes are used, then the deposition process is easier, but the resistance to degradation during high-temperature annealing deteriorates
Solution Approach 1:
The dye is segmented into multiple isolated chromophore units connected by non-conjugated bridging groups. This segmentation creates a multimeric structure where each chromophore remains individually functional for coloration while the overall multimeric architecture provides enhanced resistance to thermal degradation during annealing processes
Solution Approach 2:
The patent changes the structural parameter of the dye from monomeric to multimeric by covalently linking multiple chromophore units. This parameter change increases the molecular weight and structural complexity, which directly improves resistance to degradation during high-temperature annealing while maintaining ease of deposition through solution processing
3Stability of the object's composition
If chromophores are covalently linked to form multimeric dyes, then thermal stability is improved, but the device complexity increases
Solution Approach 1:
The dye molecule is segmented into repeatable chromophore units (n=1-3) connected by standardized non-conjugated bridging groups. This segmentation creates a modular multimeric structure that provides enhanced thermal stability while maintaining relatively simple synthesis through repetitive coupling reactions, thus limiting the increase in device complexity
Solution Approach 2:
The patent changes the chromophore multiplication parameter n to a small integer range (1-3), which provides sufficient thermal stability improvement without creating excessive molecular complexity. This parameter control ensures the multimeric dye remains manageable in terms of synthesis and device integration
Data Source
AI summary
The present disclosure relates generally to multimeric dyes, colored dielectric polymer materials, methods of making them and uses thereof. In particular, the application concerns a colored dielectric polymer material comprising a multimeric dye with structurewherein each D is independently a chromophoric unit; each L is independently absent or is a linking group comprising no more than 10 atoms in length as measured in the shortest path from D to A; A is a bridging group; and n is an integer in the range of 1 to 3.