Silver-oxime catalytic composition for uniform conductive patterns
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Solution Overview
Problem
Current methods for producing electrically-conductive patterns using silver particles are complex and inefficient, requiring high concentrations of pre-formed silver particles and unstable reactants, which lead to agglomeration and poor stability, making high-speed production of uniform conductive films challenging.
Innovation Solution
A non-aqueous metal catalytic composition comprising a silver-oxime complex with reducible silver ions, a silver ion photoreducing composition, and a photocurable component, allowing in-situ generation of silver particles as catalytic sites for electroless plating, reducing the need for dispersing agents and improving stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high concentrations of pre-formed silver particles are used, then electrically-conductive patterns can be produced, but particle agglomeration occurs and stability deteriorates
Solution Approach 1:
The patent incorporates reducible silver ions and photoreducing agents into the photocurable composition before application, so that silver particles are generated in-situ after coating and UV irradiation. This preliminary preparation of precursors eliminates the need for pre-formed particles, preventing agglomeration while ensuring uniform distribution and stable conductive patterns.
Solution Approach 2:
The patent uses reducible silver ions as an intermediary form between stable precursors and functional silver particles. These ions remain stable in the composition until UV irradiation triggers their reduction to metallic silver, providing a stable intermediate state that avoids both premature particle formation and insufficient conductivity.
2Manufacturing precision
If complex dispersing procedures are used, then silver particles can be uniformly distributed, but manufacturing complexity increases and productivity decreases
Solution Approach 1:
The patent enables the composition to self-distribute silver particles uniformly through the photocurable matrix during the curing process. The in-situ generation of silver particles from precursors occurs directly within the polymerizing composition, eliminating the need for separate dispersing steps and enabling high-speed manufacturing without sacrificing uniformity.
Solution Approach 2:
The patent combines the silver particle generation process with the photocuring process into a single step. UV irradiation simultaneously triggers both the polymerization of the photocurable component and the reduction of silver ions to particles, merging multiple functions into one operation and eliminating sequential dispersing procedures.
3Reliability
If pre-formed silver particles are used, then conductive patterns can be created, but the process requires multiple steps and manufacturing complexity increases
Solution Approach 1:
The patent incorporates all necessary components (reducible silver ions, photoreducing agents, and photocurable components) into a single pre-formulated composition. This preliminary integration of multiple functional elements into one material eliminates the need for separate particle preparation, dispersal, and application steps, simplifying the overall manufacturing process while maintaining stability.
Solution Approach 2:
The patent creates a multi-functional photocurable composition that simultaneously provides adhesion, conductivity, and particle generation capabilities. The single composition performs multiple functions that would otherwise require separate materials and processes, reducing device complexity while ensuring reliable conductive patterns.
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
This approach enables the production of uniform electrically-conductive patterns with improved stability and efficiency, facilitating high-speed manufacturing of conductive films without the need for complex dispersing procedures, and provides a simpler process for generating silver particles in situ within photocurable compositions.
Implementation Method 1
a silver ion photoreducing composition... allowing in-situ generation of silver particles
Implementation Method 2
a photocurable component or non-curable polymer... UV-curable composition... photocuring the UV-curable composition
Data Source
AI summary
A non-aqueous metal catalytic composition includes (a) a complex of silver and an oxime comprising reducible silver ions in an amount of at least 2 weight %, (b) a silver ion photoreducing composition in an amount of at least 1 weight %, and (c) a photocurable component, a non-curable polymer, or a combination of a photocurable component and a non-curable polymer. This non-aqueous metal catalytic composition can be used to form silver metal particles in situ during suitable reducing conditions. The silver metal can be provided in a suitable layer or pattern on a substrate, which can then be subsequently subjected to electroless plating to form electrically-conductive layers or patterns for use in various articles or as touch screen displays in electronic devices.