Photocurable Composition for Inkjet Planarization
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Solution Overview
Problem
Current Inkjet Adaptive Planarization (IAP) materials lack high glass transition temperature and improved dry etch performance, which are essential for forming planar cured layers suitable for subsequent processing steps in electronic circuit fabrication.
Innovation Solution
A photocurable composition comprising a polymerizable material with a multi-functional monomer of Formula (1), such as allyloxymethyl acrylate, in specific weight percentages, along with other monomers and a photo-initiator, is used to form a cured layer with a glass transition temperature of at least 120°C, suitable for inkjet-based adaptive planarization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional IAP materials are used, then the planarization process can be performed, but the glass transition temperature is insufficient and dry etch performance is poor
Solution Approach 1:
The patent changes the chemical composition parameters of the photocurable material by incorporating specific multi-functional monomers (Formula 1) with allyloxymethyl acrylate structures in controlled amounts (5-20 wt%). This compositional parameter change simultaneously achieves higher glass transition temperature (≥120°C) and improved dry etch performance, resolving the contradiction between thermal properties and process compatibility
Solution Approach 2:
The patent creates a composite photocurable composition by combining multiple components: multi-functional monomers of Formula (1), other multi-functional monomers, mono-functional monomers, and photo-initiators. This composite material approach allows synergistic effects where the combination achieves both high glass transition temperature and good dry etch performance that individual components cannot achieve alone
2Manufacturing precision
If the composition is made highly viscous to improve planarization quality, then surface flatness improves, but inkjet dispensing becomes difficult
Solution Approach 1:
The patent optimizes the viscosity parameter of the photocurable composition by controlling monomer selection and ratios, achieving a balanced viscosity range that enables both inkjet dispensing and high-quality planarization. The specific composition of multi-functional and mono-functional monomers is tuned to achieve optimal rheological properties for the inkjet process while maintaining surface flatness
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 composition achieves a high glass transition temperature and low viscosity, enabling effective planarization and improved dry etch performance, making it suitable for subsequent processing steps in electronic circuit fabrication.
Implementation Method 1
a photocurable composition can comprise a polymerizable material and a photo-initiator
Data Source
AI summary
A photocurable composition can comprise a polymerizable material and an initiator. The polymerizable material can include at least one first multi-functional monomer containing an allyloxymethyl methacrylate structure in an amount at least 5 wt % and not greater than 20 wt % based on the polymerizable material. The photocurable composition can be suitable for use in inkjet adaptive planarization and may be adapted to form cured layers having a glass transition temperature of at least 120° C.