Aluminum Conductive Paste with Vanadium Oxide for Moisture-Resistant Electrodes
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Solution Overview
Problem
Electronic components, such as those in solar battery cells, face performance degradation due to moisture reacting with aluminum oxide films, leading to increased resistance and reduced reliability, which is not adequately addressed by existing conductive pastes.
Innovation Solution
A conductive paste containing aluminum particles and a glass phase oxide with vanadium valence of 4 or less is used, dispersed in a binder resin, to form an electrode wire that is fired and provides high water resistance and reliability by covering the aluminum particles and bonding them to a substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If glass particles are added to conductive paste, then adhesion and densification are improved, but manufacturing complexity increases
Solution Approach 1:
Multiple functions are merged into a single firing process. The glass particles simultaneously provide adhesion to the substrate, densification of the electrode wire structure, and facilitate the formation of the vanadium oxide-aluminum chemical compound layer. This consolidation of functions into one step reduces overall manufacturing complexity despite the added material component
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 solution effectively reduces the specific resistance and improves the water resistance of the electrode wire, enhancing the reliability and longevity of electronic components by forming a densified chemical compound layer on the aluminum particles.
Implementation Method 1
An electrode wire is formed by firing a conductive paste in the atmosphere at a high temperature
Implementation Method 2
the oxide contains vanadium (V) with a valence of 4 or less... forming a densified chemical compound layer on the aluminum particles
Implementation Method 3
the glass particles become soft and flow when heated to a temperature higher than or equal to the softening point of the glass particles during firing of the conductive paste
Implementation Method 4
the glass particles become soft and flow... so that an electrode wire becomes densified and firmly adhered
Implementation Method 5
a conductive paste with metal particles of aluminum may have a high resistance... adding vanadium (V) or vanadium oxide (V2O5) is presented... effectively reduces the specific resistance
Data Source
AI summary
The conductive paste contains the following dispersed in a binder resin dissolved in a solvent: a plurality of particles comprising aluminum and/or an aluminum-containing alloy; and an oxide-comprising powder. The oxide contains vanadium with a valence no greater than 4 and a glass phase. In the method for manufacturing an electronic component, the conductive paste is applied to a substrate and fired, forming electrode wiring. The electronic component is provided with electrode wiring that has: a plurality of particles comprising aluminum and/or an aluminum-containing alloy; and an oxide affixing the particles to a substrate. The oxide contains vanadium with a valence no greater than 4. A compound layer containing vanadium and aluminum is formed on the surfaces of the particles, and the vanadium in the compound layer includes vanadium with a valence no greater than 4. This results in an electrode wiring with high reliability and water resistance.