Electronic Component Spiral Conductor Ag Diffusion Control
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Solution Overview
Problem
In electronic components with spiral-shaped conductors and extended conductors containing Ag, diffusion of Ag into glass during the manufacturing process leads to reduced insulation reliability and connection reliability with external electrodes.
Innovation Solution
Incorporating an oxide such as Al2O3, SiO2, ZnO, TiO2, or ZrO2 into the spiral conductor while ensuring the extended conductors contain only Ag, without these oxides, to suppress Ag diffusion and maintain high connection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Ag is used in conductors for high conductivity, then electrical conductivity is improved, but Ag diffuses into glass during firing causing insulation reliability to deteriorate
Solution Approach 1:
A glass layer is introduced as an intermediary substance between the Ag-containing conductor and the glass-containing insulating layer. This glass layer acts as a diffusion barrier, preventing Ag atoms from migrating into the insulating glass during firing while still allowing the conductor to maintain its electrical conductivity. The intermediary glass layer absorbs or blocks the harmful diffusion effect.
Solution Approach 2:
The conductor structure is designed as a composite material system consisting of Ag particles embedded in a matrix material. This composite structure allows the conductor to maintain high electrical conductivity through Ag while the matrix material provides structural stability and reduced Ag diffusion tendency during the firing process.
2Manufacturing precision
If firing temperature is increased to improve sintering quality, then manufacturing quality is improved, but Ag diffusion into glass accelerates causing insulation problems
Solution Approach 1:
A glass layer is introduced as a thermal and diffusion barrier between the conductor and the insulating glass. This intermediary layer allows the firing temperature to be increased for better sintering quality while preventing excessive Ag diffusion into the insulating glass, as the glass layer itself acts as a buffer that absorbs or blocks the diffusion flux.
Solution Approach 2:
The conductor is designed as a composite material with Ag particles in a matrix that has different thermal and diffusion properties. This composite structure allows the material to withstand higher firing temperatures for improved sintering quality while the specific composition of the composite reduces the rate of Ag diffusion into the surrounding glass.
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 enhances insulation reliability by minimizing Ag diffusion into glass, reducing the incidence of short-circuiting and maintaining high connection reliability between extended conductors and external electrodes.
Implementation Method 1
the Ag in the conductors is likely to diffuse into the glass by firing in the manufacturing process of the electronic component
Data Source
AI summary
An electronic component includes a body containing glass, external conductors including a first external electrode and a second external electrode each disposed on an external surface of the body, a spiral conductor within the body, and extended conductors including a first extended conductor and a second extended conductor each disposed within the body. One end portion of the spiral conductor is electrically connected to the first external electrode with the first extended conductor therebetween and another end portion is electrically connected to the second external electrode with the second extended conductor therebetween. The spiral conductor contains Ag and at least one oxide selected from the group consisting of Al2O3, SiO2, ZnO, TiO2, and ZrO2, and the extended conductor contains Ag, but none of Al2O3, SiO2, ZnO, TiO2, and ZrO2.