Solvent-Free Low-K Curable Compositions for Inkjet Layers
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Solution Overview
Problem
Existing optical devices face challenges in achieving thin, precise, and optically clear layers with low dielectric constants that are resistant to plasma etching and do not require solvents for inkjet printing, as they often suffer from crystallinity, viscosity issues, and solvent-induced defects.
Innovation Solution
A curable composition comprising alkyl (meth)acrylate monomers with 12 or more carbon atoms, crosslinking monomers, and copolymeric additives of polycarbosilane or polycarbosiloxane, which form non-crystalline, optically transparent layers with a dielectric constant of 3.0 or less at 1 MegaHertz, suitable for inkjet printing without solvents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional organic polymeric compositions are used to form thin layers in optical devices, then the layers can be processed with ease, but the layers tend to crystallize and lose optical clarity
Solution Approach 1:
The patent changes the chemical composition parameters by using specific monomers with 12 or more carbon atoms and polycarbosilane/polycarbosiloxane additives, which alter the physical properties of the cured layer to prevent crystallization while maintaining ease of processing and achieving optical clarity
Solution Approach 2:
The patent creates a composite material system combining alkyl (meth)acrylate monomers with polycarbosilane or polycarbosiloxane copolymeric additives, where the synergistic interaction between components prevents crystallization and maintains optical clarity while enabling easy processing
2Device complexity
If layers are made thinner to improve device integration, then device complexity is reduced, but manufacturing precision becomes more difficult to achieve
Solution Approach 1:
The patent replaces traditional solvent-based printing mechanisms with solvent-free inkjet printing of curable compositions, which cures upon deposition to form precise thin layers, eliminating solvent evaporation issues that compromise thickness control and manufacturing precision
3Ease of operation
If solvents are used in inkjet printing to achieve proper flow, then ease of operation is improved, but solvent-induced defects and plasma etching resistance are worsened
Solution Approach 1:
The patent extracts and eliminates solvents from the inkjet printing composition, using instead curable monomer compositions that can be printed without solvents and cure upon deposition, thereby eliminating solvent-induced defects while maintaining printability and improving plasma etching resistance
Solution Approach 2:
The patent changes the physical state parameters of the printing composition by using curable monomers with appropriate viscosity characteristics that enable direct inkjet printing without solvents, transforming the material from a solvent-based liquid to a curable composition that solidifies upon curing
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 solution provides thin, precise, and optically clear layers with low dielectric constants, resistant to plasma etching, and suitable for inkjet printing, maintaining thickness and smoothness without solvent-induced defects.
Implementation Method 1
The curable composition, upon curing forms a non-crystalline, optically transparent layer with a dielectric constant of less than or equal to 3.0 at 1 MegaHertz
Implementation Method 2
a curable composition comprises at least one monomer comprising an alkyl (meth)acrylate monomer with 12 or more carbon atoms, a crosslinking monomer, a copolymeric additive comprising a polycarbosilane or polycarbosiloxane, and at least one initiator
Data Source
AI summary
Low dielectric constant curable compositions include a first alkyl (meth)acrylate monomer with 12 or more carbon atoms, a crosslinking monomer, a copolymeric additive of a polycarbosilane or a polycarbosiloxane, and at least one initiator. The curable composition is solvent free and inkjet printable. Upon curing the curable composition forms a non-crystalline, optically transparent layer with a dielectric constant of less than or equal to 3.0 at 1 MegaHertz.