Multilayer Electronic Component Vanadium Oxide Glass Internal Electrode
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Solution Overview
Problem
Multilayer electronic components with metal magnetic particles face challenges in achieving high DC bias characteristics and electrical performance due to excessive oxidation during sintering, leading to insufficient sintering of internal electrodes and deteriorated electrical characteristics.
Innovation Solution
The use of a conductive metal and glass containing vanadium oxide in the internal electrode to promote sintering at a relatively low temperature, forming a dense fine structure and improving specific resistance characteristics, with the glass composition optimized to control the softening temperature and prevent excessive oxidation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sintering is performed at high temperature to achieve dense structure, then sintering density is improved, but excessive oxidation occurs leading to deteriorated electrical characteristics
Solution Approach 1:
The patent changes the sintering temperature parameter from conventional high temperature to relatively low temperature (e.g., 900-1100°C instead of higher temperatures), and combines this with specific glass composition parameters (vanadium oxide content: 20-40 wt%, zinc oxide: 10-30 wt%) to achieve dense sintering without excessive oxidation. This parameter optimization resolves the contradiction between achieving density and preventing oxidation damage.
Solution Approach 2:
The patent uses a composite glass composition containing multiple oxides (vanadium oxide, zinc oxide, boron oxide, silicon oxide, etc.) that work synergistically. The vanadium oxide promotes sintering and forms liquid phase to fill pores, while zinc oxide suppresses oxidation of magnetic particles. This composite material approach allows dense structure formation at lower temperatures without excessive oxidation.
2Object-generated harmful factors
If sintering temperature is reduced to prevent oxidation, then electrical characteristics are improved, but sintering density becomes insufficient
Solution Approach 1:
The patent optimizes the glass composition parameters, specifically setting vanadium oxide content at 20-40 wt% and zinc oxide at 10-30 wt%, which lowers the softening temperature of the glass to 400-600°C. This enables effective sintering at relatively low temperatures (900-1100°C) while maintaining dense structure formation, thus preventing oxidation damage without sacrificing sintering density.
Solution Approach 2:
The patent utilizes the phase transition of glass from solid to liquid state at its softening temperature (400-600°C). The glass undergoes this transition during sintering, forming a liquid phase that fills pores and binds particles, then solidifies upon cooling to create a dense structure. This phase transition mechanism enables effective sintering at lower temperatures.
3Ease of manufacture
If conventional glass composition is used, then manufacturing process is simple, but specific resistance and electrical characteristics are insufficient
Solution Approach 1:
The patent employs a composite glass composition with specifically controlled contents of multiple oxides: vanadium oxide (20-40 wt%) for sintering promotion, zinc oxide (10-30 wt%) for oxidation suppression, boron oxide (10-30 wt%) and silicon oxide (10-30 wt%) for glass network formation. This composite material provides both dense sintering and excellent electrical characteristics while maintaining relatively simple manufacturing process through conventional mixing and sintering steps.
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 formation of internal electrodes with excellent specific resistance and dense fine structures, enhancing electrical characteristics and reliability while maintaining high magnetic properties at reduced sintering temperatures.
Implementation Method 1
the glass contains a vanadium (V) oxide... promote sintering at a relatively low temperature
Implementation Method 2
promote sintering at a relatively low temperature, forming a dense fine structure
Implementation Method 3
glass composition optimized to control the softening temperature and prevent excessive oxidation
Data Source
AI summary
A multilayer electronic component may include a multilayer body including a plurality of magnetic material layers, and an internal electrode disposed in the multilayer body. The internal electrode may contain a conductive metal and glass, and the glass contains a vanadium (V) oxide. Also, a conductive paste composition for an internal electrode includes a conductive metal and glass, wherein the glass contains a vanadium (V) oxide.