Anisotropic Conductive Film Particle Sorting for Fewer Conduction Defects
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The manufacturing of anisotropic conductive films with conductive particles of varying diameters results in high costs and conduction defects due to inefficiencies in particle distribution and arrangement, leading to hindered connectivity.
Innovation Solution
A method involving a member with multiple opening parts to sort and hold conductive particles, achieving a specific particle diameter distribution graph shape that ensures infinite slope at or above the maximum peak diameter, thereby reducing manufacturing costs and suppressing conduction defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conductive particles of significantly different particle diameters are arranged in a plan view, then the particle diameter distribution becomes sharp, but insufficiencies in the pushing in of the conductive particles are generated causing conduction defects
Solution Approach 1:
The invention changes the particle diameter distribution parameters by controlling the slope to be substantially infinite in a specific range (at or above maximum peak particle diameter). This parameter control ensures that particles are pushed in sufficiently while maintaining sharp distribution, resolving the contradiction between manufacturing precision and reliability
Solution Approach 2:
The invention performs preliminary classification of conductive particles before they are transferred to the adhesive film. By pre-establishing the specific particle diameter distribution graph shape, the system prevents conduction defects before they occur, rather than attempting to correct them afterward
2Manufacturing precision
If conductive particles are classified to ensure sharp particle diameter distribution, then anisotropic connection is not hindered, but manufacturing costs become high
Solution Approach 1:
The invention defines a specific particle diameter distribution graph shape with a substantially infinite slope in a particular range. This precise parameter definition enables effective particle classification without requiring excessive sorting steps, thereby reducing manufacturing costs while maintaining sharp particle diameter distribution
Solution Approach 2:
The invention uses a mold with opening parts as a template to automatically sort and arrange particles. This copying approach replicates the desired particle distribution pattern efficiently, reducing the need for complex manual classification processes and lowering manufacturing costs
3Ease of manufacture
If conductive particles with varying particle diameters are used, then manufacturing costs are reduced, but conduction defects occur due to inefficiencies in particle distribution
Solution Approach 1:
The invention controls the particle diameter distribution by establishing a specific graph shape with substantially infinite slope. This parameter control allows the use of particles with varying diameters while preventing conduction defects, thus maintaining both cost-effectiveness and reliability
Solution Approach 2:
The mold with opening parts serves as an intermediary that sorts and arranges particles of varying diameters. This intermediary structure enables cost-effective use of mixed-size particles while ensuring proper distribution and preventing conduction defects
Data Source
AI summary
Provided is an anisotropic conductive film manufacturing method capable of reducing manufacturing costs. Also provided is an anisotropic conductive film capable of suppressing the occurrence of conduction defects. The anisotropic conductive film manufacturing method includes: a holding step of supplying conductive particles having a plurality of particle diameters on a member having a plurality of opening parts, and holding the conductive particles in the opening parts; and a transfer step of transferring the conductive particles held in the opening parts to an adhesive film. In the particle diameter distribution graph (X-axis: particle diameter (μm), Y-axis: number of particles) of the conductive particles held in the opening parts, the shape of the graph is such that the slope is substantially infinite in a range at or above a maximum peak particle diameter.