Imprint Lithography Ink Composition Thermal Stability
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Solution Overview
Problem
Current ink compositions for imprint lithography and roll printing face challenges in maintaining pattern accuracy and linewidth integrity at high temperatures, leading to defects and reduced productivity due to inadequate adhesive forces and pattern deformation.
Innovation Solution
An ink composition comprising novolak resin, a thermal stability additive such as methyl gallate or propyl gallate, silicon-based surfactant, and hexamethylol melamine hexamethyl ether, with specific weight percentages that enhance thermal endurance and pattern formation capabilities, ensuring consistent linewidth and line interval maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional ink composition is used for imprint lithography and roll printing, then the printing process can be performed, but pattern accuracy deteriorates and linewidth integrity is lost at high temperatures
Solution Approach 1:
The patent modifies the chemical composition parameters of the ink by incorporating specific polymers (polymer 1 and polymer 2 with defined molecular weights and weight ratios), adhesion promoters, and curing agents to achieve optimal thermal stability and pattern accuracy at high temperatures
Solution Approach 2:
The ink composition uses a composite system combining multiple polymers (acrylonitrile-butadiene-styrene copolymer and polyacrylic acid), adhesion promoters, curing agents, and surfactants to simultaneously achieve thermal resistance, adhesion, and pattern fidelity at elevated temperatures
2Strength
If conventional ink composition is used, then the printing process can proceed, but adhesive force is insufficient leading to pattern deformation
Solution Approach 1:
The patent introduces adhesion promoters (such as silane coupling agents or titanium dioxide) as intermediary substances that enhance the bonding between the ink and substrate, preventing pattern deformation while maintaining printability
Solution Approach 2:
The ink formulation adjusts the weight ratio of polymers to adhesion promoters and curing agents to optimize adhesive force, ensuring patterns maintain their integrity without deformation during the printing process
3Strength
If high temperature processing is applied to improve adhesion, then adhesive force increases, but pattern linewidth and line interval deform
Solution Approach 1:
The patent optimizes the glass transition temperatures of the polymer components (Tg1 and Tg2 within specific ranges) to balance adhesion enhancement at elevated temperatures while preventing linewidth deformation, achieving both strong bonding and dimensional stability
Solution Approach 2:
The dual-polymer composite system with controlled molecular weights and weight ratios provides synergistic effects where one polymer enhances adhesion at high temperature while the other maintains pattern dimensional stability, preventing linewidth deformation
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 ink composition achieves superior pattern accuracy and increased productivity by maintaining pattern integrity at high temperatures, improving yield and process efficiency through enhanced thermal stability and adhesive properties.
Implementation Method 1
an ink composition consisting of novolak resin; an additive added to retain thermal stability; silicon-based surfactant; hexamethylol melamine hexamethyl ether
Implementation Method 2
silicon-based surfactant
Implementation Method 3
improving yield and process efficiency through enhanced thermal stability and adhesive properties
Data Source
AI summary
Disclosed are an ink composition for an imprint lithography and a roll printing, wherein in forming patterns of the LCD device using the imprint lithography and the roll printing, an ink composition with high thermal resistance, consisting of polymer resin and additive both endurable even at a high temperature is used to form fine patterns with constantly maintaining pattern linewidths and line intervals, and wherein the ink composition is endurable even at a high temperature of 90-250° C.