Nanoscale Sintering Paste for Bonding Oxidized Aluminum Conductors
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Solution Overview
Problem
Aluminum conductors with a high-melting Al2O3 oxide layer pose challenges for joining to electronic components due to the need for complex and elaborate methods, limiting their use as a cost-effective alternative to copper conductors.
Innovation Solution
A sintering paste with nanoscale non-ferrous metal particles is used to form an electrically conductive, materially bonded connection between an aluminum conductor covered with an oxide layer and an electronic component, utilizing diffusion through lattice defects under low pressure and temperature, eliminating the need for aggressive fluxes and complex joining methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional joining methods are used for aluminum conductors with Al2O3 oxide layer, then reliable electrical connection can be achieved, but the process becomes complex and elaborate
Solution Approach 1:
A sintering paste comprising nanoscale particles (1-100 nm) is introduced as an intermediary substance between the aluminum conductor with Al2O3 oxide layer and the electronic component. The nanoscale particles enable diffusion through the oxide layer under reduced pressure and temperature conditions, achieving reliable material bonding without complex conventional joining methods
Solution Approach 2:
The invention changes the physical parameters of the joining process by using nanoscale particles that can diffuse through the oxide layer at lower temperatures and pressures compared to conventional methods. This parameter change enables simpler processing while maintaining connection reliability
2Ease of manufacture
If aluminum conductors are used instead of copper conductors, then cost-effectiveness and conductivity-to-density ratio are improved, but the Al2O3 oxide layer creates joining difficulties
Solution Approach 1:
The sintering paste with nanoscale particles serves as a mediator that enables easy joining of aluminum conductors, eliminating the complexity associated with aluminum's oxide layer while preserving the cost-effectiveness and conductivity-to-density advantages of aluminum over copper
3Strength
If high pressure and temperature are applied to join aluminum conductor through oxide layer, then material bonding is achieved, but the process becomes elaborate and costly
Solution Approach 1:
By using nanoscale particles (1-100 nm) that can diffuse through the oxide layer, the invention reduces the pressure and temperature parameters required for joining compared to conventional methods, achieving strong material bonding through simpler and less costly processes
Solution Approach 2:
The sintering paste forms a composite structure comprising nanoscale particles that facilitate bonding between the aluminum conductor and electronic component, creating a multi-material system that achieves strong joints under reduced processing conditions
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 method enables reliable, cost-effective, and efficient bonding of aluminum conductors to electronic components at lower temperatures and pressures, enhancing the service life and reliability of connections while allowing the use of aluminum as a less expensive conductor material.
Implementation Method 1
nanoscale particles which are suitable for forming an electrically conductive, materially bonded connection of the aluminum conductor covered with an oxide layer to the electronic component by diffusion under the influence of pressure and temperature
Implementation Method 2
the material of the aluminum conductor can be alloyed using the nanoscale particles and under the influence of pressure and temperature
Data Source
AI summary
A sintering paste may be utilized for the electrically conductive, materially bonded connection of an aluminum conductor covered with an oxide layer to an electronic component. The sintering paste may include nanoscale particles suitable for forming an electrically conductive, materially bonded connection of the aluminum conductor covered with the oxide layer to the electronic component via diffusion under the influence of pressure and temperature.