Anisotropic Conductive Film Preset Regions Capsule Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In anisotropic conductive films (ACFs) used in display modules, the random arrangement of microcapsules leads to uneven distribution of conductive particles, resulting in poor bonding and increased risk of defective conduction, affecting product yield.
Innovation Solution
The ACFs are designed with preset regions corresponding to electrodes, where a higher number of capsule structures are uniformly dispersed to ensure consistent conductive particle capture, improving the bonding process and reducing the risk of poor connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If microcapsules are randomly arranged in the ACF, then the manufacturing process is simple, but the distribution of conductive particles becomes uneven
Solution Approach 1:
The patent applies local quality by creating preset regions with different capsule structure densities. Specifically, regions corresponding to electrode areas have a first density of capsule structures, while regions corresponding to spacing areas have a second density. This localized differentiation ensures uniform conductive particle capture at electrode locations without requiring complete randomness throughout the entire ACF, thus resolving the contradiction between manufacturing simplicity and distribution uniformity.
Solution Approach 2:
The patent segments the ACF into multiple preset regions, each corresponding to either an electrode area or a spacing area. This segmentation allows independent control of capsule structure distribution in different functional zones. By dividing the continuous ACF into discrete regions with specific capsule densities, the patent achieves precise control over conductive particle distribution while maintaining a relatively simple manufacturing process.
2Manufacturing precision
If microcapsules are uniformly distributed throughout the ACF, then conductive particle capture is consistent, but the number of capsules in non-electrode areas increases unnecessarily
Solution Approach 1:
The patent implements local quality by assigning different capsule structure densities to different regions. Preset regions corresponding to electrode areas contain capsule structures at a first density optimized for conductive particle capture, while preset regions corresponding to spacing areas contain capsule structures at a lower second density. This localized approach ensures uniform particle capture where needed (at electrodes) while reducing unnecessary capsule quantities in non-functional areas (spacing regions).
Solution Approach 2:
The patent applies partial action by concentrating capsule structures only where they are functionally necessary - specifically in regions corresponding to electrodes. By omitting or reducing capsule structures in spacing areas where they serve no functional purpose, the patent avoids excessive material usage while maintaining adequate conductive particle capture capability in the electrode regions.
3Reliability
If high density of capsule structures is used in all regions, then conductive connections are ensured, but material cost and ACF thickness increase
Solution Approach 1:
The patent applies local quality by creating spatial variation in capsule structure density across the ACF. Regions corresponding to electrodes maintain a first density that ensures reliable conductive connections, while regions corresponding to spacing areas use a reduced second density. This localized density control maintains connection reliability where required while reducing overall ACF thickness and material consumption in non-critical regions.
Solution Approach 2:
The patent segments the ACF into functional regions with different capsule density requirements. By separating electrode-corresponding regions from spacing-corresponding regions and assigning appropriate capsule densities to each, the patent achieves reliable conduction in critical areas without uniformly increasing ACF thickness across the entire structure.
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 design enhances the uniformity of conductive particle capture, reducing the likelihood of poor bonding and improving product yield by ensuring adequate conductive connections between electrodes.
Implementation Method 1
When the microcapsule is subjected to extrusion in a direction perpendicular to an ACF surface, the insulating layer on the surface is cracked to expose the conductive ball inside, thus realizing the directional conductive connection in the direction perpendicular to the ACE surface
Data Source
AI summary
Embodiments of the present disclosure provide an anisotropic conductive film and a forming method thereof, an ACF roll, a bonding structure and a display device. The anisotropic conductive film (ACF) includes: an insulating adhesive layer, including a plurality of preset regions corresponding to electrodes to be bonded and spaced from each other; and capsule structures, dispersed in the insulating adhesive layer of the plurality of preset regions and configured to realize a electrical connection in a direction perpendicular to a surface of the ACF when the ACF is subjected to a pressure in the direction perpendicular to the surface of the ACF, wherein a number of the capsule structures in each of the plurality of preset regions is greater than a preset number.