Activatable Conductive Film Electrical Connection for Camera Modules
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Solution Overview
Problem
Anisotropic conductive films (ACFs) used in camera modules can experience uneven distribution of conductive fillers when subjected to heat and pressure, leading to signal interference among pads, which degrades the performance and reliability of the camera module.
Innovation Solution
A method involving a pre-bonding assembly with an insulating layer and an activatable conductive film is used to establish electrical connections. The activatable conductive film, composed of conductive particles and an adhesive, is pressed between connection pads, transforming into an activated conductive film that forms a conductive pathway while being insulated by the layer, thereby minimizing short circuits and signal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heat and pressure are applied to ACFs to establish electrical connection, then electrical connection is formed, but conductive fillers become unevenly distributed causing signal interference
Solution Approach 1:
The patent introduces an insulating layer as an intermediary substance between the ACF and the connection pads. This insulating layer prevents direct contact between conductive fillers and adjacent pads, thereby eliminating signal interference while maintaining the electrical connection function of the ACF under heat and pressure.
Solution Approach 2:
The patent extracts the insulating function from the ACF system by adding a separate insulating layer. This separation allows the ACF to focus on providing electrical connection while the insulating layer handles the isolation function, preventing conductive filler interference with adjacent pads.
2Ease of manufacture
If ACF is used to connect pads, then electrical connection is established, but conductive fillers may cause short circuits among pads
Solution Approach 1:
The insulating layer serves as a mediator between the ACF and connection pads, allowing the ACF to be easily pressed into place for electrical connection while the insulating layer prevents conductive fillers from causing short circuits between adjacent pads.
Solution Approach 2:
The patent segments the functional requirements by separating the conductive function (handled by ACF) from the insulating function (handled by the insulating layer). This segmentation allows each component to optimize its specific function without interfering with the other.
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 effectively reduces the risk of short circuits and signal interference, enhancing the reliability and performance of the camera module by ensuring stable electrical connections and insulating against external electrostatic influences.
Implementation Method 1
when heat and pressure are applied to the ACFs, the conductive fillers may become unevenly distributed
Implementation Method 2
insulating against external electrostatic influences
Data Source
AI summary
A method for electrical connection is presented, including preparing a pre-bonding assembly with a first and second connection pad and an insulating layer, where the first pad includes two sections, with the second staggered and covered by the insulating layer. An activatable conductive film, filled with isolated conductive particles, is placed between the first pad's section and the second pad. Upon pressing, the film activates, extending into the insulating layer, connecting the first section and second pad electrically, while isolating the second section. This provides a reliable connection, suitable for camera modules and other electronics.