Anisotropic Conductive Adhesive Demagnetization Prevents Particle Aggregation
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Solution Overview
Problem
Anisotropic conductive films using magnetic conductive particles, such as nickel-coated resin particles, face issues with particle aggregation during the connection process, leading to conduction failures and short circuits due to the melting and flowing of insulating adhesive components, which affects connection reliability and insulation.
Innovation Solution
Demagnetizing the conductive particles before their use in the anisotropic conductive adhesive, either in powder form, as a paste, or in a film, to prevent particle aggregation and ensure stable connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic conductive particles (nickel-coated resin particles) are used in anisotropic conductive adhesive, then conductivity and deformability are improved, but particle aggregation occurs during the connection process leading to conduction failure and short circuits
Solution Approach 1:
The patent applies preliminary action by demagnetizing the magnetic conductive particles before they are incorporated into the anisotropic conductive adhesive. This pre-demagnetization treatment prevents magnetic attraction between particles during subsequent processing and connection operations, thereby maintaining stable particle distribution and preventing aggregation that would lead to conduction failures or short circuits.
Solution Approach 2:
The patent employs preliminary anti-action by applying a demagnetization treatment that counteracts the magnetic attraction forces between conductive particles before they can cause aggregation. This preliminary counter-action ensures that particles remain dispersed throughout the adhesive matrix during the connection process, preventing the harmful aggregation effect while maintaining the beneficial conductivity and deformability of magnetic particles.
2Reliability
If conductive particles are used to establish anisotropic conductive connection, then electrical connection is achieved, but insulating adhesive melts and flows causing conductive particles to move and aggregate
Solution Approach 1:
The patent applies preliminary action by demagnetizing the conductive particles before the anisotropic conductive connection process. This pre-treatment ensures that when the insulating adhesive melts and flows during connection, the demagnetized particles do not experience magnetic attraction forces that would cause them to move and aggregate, thereby maintaining ease of operation without compromising particle position control.
3Ease of manufacture
If nickel-coated resin particles are used as conductive particles, then cost-effective conductivity is achieved, but magnetic aggregation occurs during the connection process
Solution Approach 1:
The patent applies preliminary action by demagnetizing the nickel-coated resin particles before incorporation into the adhesive. This cost-effective pre-treatment prevents magnetic aggregation during the connection process, thereby maintaining manufacturing cost efficiency while ensuring insulation reliability by preventing particle aggregation that would cause short circuits.
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 demagnetization of conductive particles significantly improves connection reliability and insulation reliability by preventing particle aggregation, maintaining optimal connection resistance and insulation properties.
Implementation Method 1
demagnetizing the conductive particles, for example, nickel-coated resin particles, at least partially composed of a magnetic material and to be added to the anisotropic conductive adhesive
Data Source
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AI summary
In an anisotropic conductive adhesive including a magnetic powder such as nickel-coated resin particles used as conductive particles, the conductive particles are present in an insulating adhesive composition without being aggregated. The magnetic powder used as the conductive particles is at least partially composed of a magnetic material. In this case, demagnetization has been performed on the conductive particles in a powder form that have not been dispersed in the insulating adhesive composition, the conductive particles in a paste obtained by dispersing the conductive particles in the insulating adhesive composition, or the conductive particles in a film formed from the paste, before establishment of an anisotropic conductive connection using the anisotropic conductive adhesive.