Fine Metal Particle Composition with Organic Coating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fine metal particles, such as silver, are difficult to handle due to aggregation issues, which impairs the quality and productivity of conductive pastes used in printed circuit boards, requiring re-dispersion that is not easily achievable.
Innovation Solution
A fine metal particle-containing composition with a surface-coating organic compound, where the weight ratio of the organic compound to the total composition is between 2% and 15%, is manufactured by dispersing a silver compound in a liquid, precipitating fine silver particles, and binding a second organic compound to the particles' surface, preventing aggregation and improving handleability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If extremely small particles (nano particles) are used to obtain excellent printing characteristic and conductivity, then printing characteristic and conductivity are improved, but handleability deteriorates due to difficulty in handling fine particles
Solution Approach 1:
An organic compound is introduced as an intermediary substance that coats the surface of fine metal particles. This coating layer acts as a mediator between the fine particles and the external environment, improving handleability while preserving the excellent printing characteristics and conductivity achieved through using nano particles.
Solution Approach 2:
The invention creates a composite structure where fine metal particles are combined with an organic compound coating. This composite material approach allows the system to simultaneously achieve the electrical conductivity and printing precision of metal particles while gaining the handling benefits of organic materials through the coating layer.
2Reliability
If extremely small particles (nano particles) are used to obtain excellent conductivity, then conductivity is improved, but handleability deteriorates due to difficulty in handling fine particles
Solution Approach 1:
The organic compound serves as a protective intermediary that maintains the conductivity properties of fine metal particles while making them easier to handle. The coating preserves the electrical functionality while improving operational characteristics.
Solution Approach 2:
By forming a composite of fine metal particles with organic compound coating, the invention achieves both high conductivity (from the metal particles) and improved handleability (from the organic coating), resolving the contradiction between reliability and ease of operation.
3Manufacturing precision
If fine metal particles are used, then printing characteristic is improved, but aggregation occurs easily which impairs quality
Solution Approach 1:
The organic compound acts as a separating intermediary between fine metal particles, preventing direct contact and aggregation. This coating layer maintains particle dispersion and compositional stability while preserving the printing characteristics achieved through using fine particles.
Solution Approach 2:
A thin film of organic compound coats each fine metal particle, creating a protective shell that prevents aggregation. This flexible coating maintains particle individuality and prevents clumping, thereby preserving both printing characteristics and compositional stability.
4Reliability
If fine metal particles are used, then conductivity is improved, but aggregation occurs easily which impairs quality
Solution Approach 1:
The organic compound coating serves as a stabilizing intermediary that prevents aggregation of conductive metal particles. This maintains both the electrical conductivity provided by the fine particles and the compositional stability needed to prevent quality degradation.
Solution Approach 2:
A thin organic film coats each particle, creating a protective barrier that maintains particle separation. This prevents aggregation while preserving the conductivity benefits of fine metal particles, thereby maintaining both reliability and compositional stability.
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 ensures excellent handleability and dispersion of metal particles, suppressing aggregation and resulting in conductive pastes with enhanced conductivity and printing characteristics, eliminating the need for special re-dispersion devices.
Implementation Method 1
an organic compound that coats a surface of each particle
Implementation Method 2
dispersing a silver compound in a carrier that is a liquid to obtain a dispersion liquid
Implementation Method 3
precipitating, in the dispersion liquid, a fine silver particle
Data Source
AI summary
A fine silver particle-containing composition includes a large number of fine silver particles 2 and a coating layer 4 that covers a surface of each silver particle 2. The silver particle 2 is a so-called nano particle. The silver particle 2 has a scale-like shape. The coating layer 4 consists of an organic compound. The organic compound binds to the silver particle 2. The organic compound suppresses aggregation of the silver particle 2. The composition is in a cake form. A weight ratio of the organic compound with regard to the total amount of the composition is not lower than 2% but not higher than 15%.