Photosensitive Resin Composition for Fine Conductive Patterns
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Solution Overview
Problem
The existing methods for forming fine electrically conductive patterns using photosensitive resin compositions with silver fine particles coated with carbon substances result in poor appearance and reliability issues, especially when used on substrates with organic components, due to residue formation.
Innovation Solution
A photosensitive resin composition comprising electrically conductive particles with a carbon surface coating, an alkali-soluble resin containing an acid-dissociation group, and a metal chelate compound, which prevents particle fusion and enhances pattern resolution and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If silver fine particles coated with carbon simple substance and/or carbon compound are used to form fine patterns, then fine pattern resolution is achieved, but residues are formed on substrates particularly on films containing organic components
Solution Approach 1:
The invention changes the chemical composition parameters of the photosensitive resin by incorporating specific components (metal chelate compounds, alkali-soluble resins with acid-dissociation groups, and non-alkali-soluble resins) that modify the development characteristics and reduce residue formation while maintaining fine pattern resolution
Solution Approach 2:
The invention uses a composite photosensitive resin composition combining multiple resin types (alkali-soluble and non-alkali-soluble), metal chelate compounds, and specifically controlled silver particles with carbon coating, creating a material system that achieves both fine pattern formation and reduced residues on organic substrates
2Manufacturing precision
If electrically conductive particles with finer particle size are used to form super fine patterns of 5 μm or less, then pattern fineness is improved, but particle agglomeration becomes more likely
Solution Approach 1:
The invention introduces surface-coated electrically conductive particles where a carbon coating layer acts as an intermediary between the metal core and the photosensitive resin matrix, preventing direct interaction that causes agglomeration while maintaining electrical conductivity and enabling fine pattern formation
Solution Approach 2:
The invention controls the particle size parameter within a specific range (0.01-10 μm, preferably 0.05-5 μm) and modifies surface properties through coating, achieving a balance between pattern fineness and dispersion stability by optimizing these physical parameters
3Reliability
If carbon-coated silver fine particles are used to prevent particle fusion, then electrical conductivity is maintained, but residues are formed on organic component films
Solution Approach 1:
The invention modifies the chemical environment parameters during development by introducing metal chelate compounds and alkali-soluble resins with acid-dissociation groups, changing the development mechanism to reduce residue formation while preserving the carbon-coated particle structure and electrical conductivity
Solution Approach 2:
The invention creates a transferable pattern by using the carbon-coated particles as a stable conductive element that can be precisely positioned through photolithography, then transferred to the substrate with minimal residue, effectively copying the desired pattern without leaving harmful remnants
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 fine conductive pattern with good appearance and high reliability by preventing particle fusion and residue formation, while maintaining desired electrical conductivity.
Implementation Method 1
a metal chelate compound (C)
Implementation Method 2
an alkali-soluble resin (B) containing an acid-dissociation group
Implementation Method 3
UV light or the like is irradiated thereto through a photomask on which a shape of a fine circuit pattern is drawn, to form exposed portions and unexposed portions on the coating film
Implementation Method 4
electrically conductive particles (A) whose surfaces are coated with a carbon simple substance and/or a carbon compound
Data Source
AI summary
A photosensitive resin composition includes electrically conductive particles (A) whose surfaces are coated with a carbon simple substance and/or a carbon compound; an alkali-soluble resin (B) containing an acid-dissociation group; and a metal chelate compound (C) wherein the metal chelate compound (C) includes at least one selected from the group consisting of Au, Ag, Cu, Cr, Fe, Co, Ni, Bi, Pb, Zn, Pd, Pt, Al, Ti, Zr, W and Mo.