Particle-Free Electrode Composition for MLCC Short-Circuit Prevention
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Solution Overview
Problem
Existing conductive pastes for multilayer ceramic capacitors contain coarse metal particles that cause short-circuiting due to breakage through dielectric layers during stacking, leading to inefficiencies in miniaturization and increased short-circuiting during firing.
Innovation Solution
A conductive composition comprising an organometallic compound and an organic solvent, free of metal particles, is used to form electrodes, ensuring no metal particles break through dielectric layers, thereby reducing short-circuiting and enabling miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal particles are used in conductive paste, then electrical conductivity is achieved, but coarse particles cause short-circuiting during stacking and pressing
Solution Approach 1:
The patent changes the fundamental parameter of metal particle size to the molecular level by using organometallic compounds. These compounds decompose during firing to form metal electrodes without requiring pre-formed metal particles, thereby eliminating the short-circuiting problem caused by coarse particles while maintaining electrical conductivity.
Solution Approach 2:
The patent introduces organometallic compounds as an intermediary substance that serves as a precursor to metal electrodes. These compounds act as a mediator between the conductive paste formulation and the final metal electrode structure, allowing controlled formation of fine metal particles during the firing process rather than using pre-formed coarse particles.
2Reliability
If metal particles are removed to prevent short-circuiting, then reliability improves, but conductivity formation becomes difficult
Solution Approach 1:
The patent applies preliminary action by incorporating organometallic compounds into the conductive paste before the stacking and firing processes. These compounds are pre-positioned to decompose and form metal electrodes in-situ during firing, eliminating the need for subsequent metal particle formation steps and simplifying the manufacturing process.
Solution Approach 2:
The patent replaces the mechanical system of metal particle handling and placement with a chemical system. Instead of physically manipulating metal particles through classification and filtration, the invention uses chemical decomposition of organometallic compounds during firing to form metal electrodes, thereby simplifying the manufacturing process.
3Object-affected harmful factors
If classification or filtration is used to remove coarse particles, then short-circuiting is reduced, but production time increases and accuracy is insufficient
Solution Approach 1:
The patent extracts the problematic coarse metal particles from the conductive paste formulation entirely by replacing them with organometallic compounds. This extraction eliminates the need for classification or filtration processes to remove coarse particles, as the compounds decompose to form only fine metal particles during firing.
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 conductive composition effectively prevents short-circuiting during firing, allowing for the miniaturization of multilayer ceramic capacitors with improved manufacturing yield and insulation properties.
Implementation Method 1
The conductive composition contains an organometallic compound containing a metal element... significantly reduces short-circuiting during the firing process
Data Source
AI summary
A conductive composition for electrode formation contains an organometallic compound containing a metal element, and an organic solvent. The conductive composition is substantially free of metal particles.