Single Anisotropic Conductive Film for Driver IC Assembly
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Solution Overview
Problem
Conventional assembly methods for driver components in flat display panels, such as LCDs, are economically undesirable due to complex connector structures and the use of multiple anisotropic conductive layers, leading to high material costs and processing times.
Innovation Solution
A connection structure using a single anisotropic conductive film to connect driver ICs and a flexible printed circuit to a common wire on a substrate, with the flexible printed circuit overlapping the common wire between ICs, allowing for a simplified assembly process and reduced material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional connector structures or multiple anisotropic conductive layers are used to connect driver ICs and flexible printed circuits, then reliable electrical connections are achieved, but material costs and device complexity increase significantly
Solution Approach 1:
The patent merges the functions of multiple anisotropic conductive layers into a single anisotropic conductive film that simultaneously connects both driver ICs and the flexible printed circuit to the common wire, eliminating the need for separate connector structures and reducing overall assembly complexity while maintaining reliable electrical connections
Solution Approach 2:
The single anisotropic conductive film serves multiple functions: it acts as both the connection medium for the driver ICs and the flexible printed circuit, and provides the common wire interconnection function, thereby reducing the number of components needed and simplifying the overall device structure
2Reliability
If conventional assembly methods with multiple anisotropic conductive layers are used, then driver components are properly connected, but processing time and material costs increase
Solution Approach 1:
By combining multiple assembly steps into a single operation where one anisotropic conductive film performs the work of multiple layers, the patent reduces the number of processing steps required, thereby increasing assembly productivity without compromising connection reliability
Solution Approach 2:
The flexible printed circuit is designed with a portion that overlaps the common wire in advance, and the single anisotropic conductive film is prepared to connect all components simultaneously, allowing for streamlined assembly processing that reduces overall manufacturing time
3Reliability
If complex connector structures are used to interconnect driver ICs and flexible printed circuits, then electrical connections are established, but manufacturing costs increase
Solution Approach 1:
The patent replaces expensive, complex connector structures with a simpler, more cost-effective single anisotropic conductive film that achieves the same electrical connection function, thereby reducing material costs and making the manufacturing process more economically viable
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 approach reduces material costs and processing time by enabling efficient electrical connections between driver ICs and flexible printed circuits using a single anisotropic conductive film, minimizing assembly space and preventing signal loss.
Implementation Method 1
one anisotropic conductive film that connects the two driver ICs and the flexible printed circuit to the common wire
Implementation Method 2
The ICs and the flexible printed circuit then are pressed against the substrate while the anisotropic conductive film is heated
Data Source
AI summary
A flat display panel comprises a plurality of driver ICs and one or more flexible printed circuit, a plurality of common wires formed on the substrate to electrically connect the ICs to the one or more flexible printed circuit, and at least one anisotropic conductive film that connects respective connecting terminals of the driver ICs and flexible printed circuit to terminals pads of the common wires. The anisotropic conductive film is laminated over the substrate to cover the terminal pads. The driver ICs and flexible printed circuit are aligned and attached on the anisotropic conductive layer by thermocompression bonding.