LDS Antenna Substrate with Decorative Ink and FPC Connection
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Solution Overview
Problem
Existing methods for manufacturing antennas in electronic devices, such as those using Laser Direct Structuring (LDS), face challenges in saving space and cost, and are prone to misalignment, particularly when directly coating the surface of the substrate, which hinders miniaturization and aesthetics.
Innovation Solution
The implementation of a substrate with a decorative ink layer and multiple LDS ink layers, where LDS antennas are formed using laser direct structuring technology, and connected via a flexible printed circuit and anisotropic conductive adhesive, allowing for efficient signal transmission and reception while optimizing space usage and manufacturing simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LDS coating is directly coated on the surface of the substrate, then the antenna can be formed quickly, but it causes misalignment of the antenna and is not conducive to saving space and cost
Solution Approach 1:
The patent applies preliminary action by pre-coating the substrate with LDS coating material before the actual antenna pattern formation. This preliminary coating layer ensures proper alignment and positioning of the antenna patterns during subsequent laser processing, eliminating misalignment issues while maintaining rapid production speeds.
Solution Approach 2:
The patent introduces an intermediary layer or positioning structure between the substrate and the LDS coating application process. This intermediary element serves as a reference or guide that ensures precise alignment of the antenna patterns during laser direct structuring, thereby improving manufacturing precision without sacrificing productivity.
2Adaptability or versatility
If more antennas are built into electronic devices, then wireless communication functions are enhanced, but space consumption increases
Solution Approach 1:
The patent merges multiple antenna functions into a single integrated substrate structure. By using the same substrate and LDS coating process for multiple antenna patterns, the design consolidates what would traditionally require separate components, thereby enhancing wireless communication capabilities while minimizing space consumption.
Solution Approach 2:
The patent utilizes the surface area of the substrate in another dimension by arranging multiple antenna patterns in a compact, multi-dimensional layout. This allows multiple antennas to coexist in a limited space by optimizing their spatial arrangement on the substrate surface, thus enhancing functionality without proportionally increasing area usage.
3Manufacturing precision
If traditional etching or laser techniques are used to manufacture antenna shape, then antenna precision is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent replaces complex mechanical etching processes with laser direct structuring technology. The laser beam directly writes the antenna patterns onto the LDS-coated substrate without requiring mechanical masking, etching chemicals, or complex tooling, thereby achieving high precision antenna shapes while significantly simplifying the manufacturing process and reducing costs.
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 enhances signal transmission efficiency, meets the demands of miniaturization and flexibility, and simplifies the manufacturing process by reducing material waste and improving antenna stability, while maintaining a compact and aesthetically pleasing design.
Implementation Method 1
Laser direct structuring technology refers to make computer to control the movement of the laser in accordance with the trajectory of the conductive pattern, the laser is projected onto a molded three-dimensional plastic device
Implementation Method 2
the laser is projected onto a molded three-dimensional plastic device to activate the circuit pattern within a few seconds
Implementation Method 3
the conductive member comprises a flexible printed circuit and an anisotropic conductive adhesive connecting the flexible printed circuit and feed-in portion
Data Source
AI summary
An electronic device includes a substrate with a plurality of LDS antennas and a conductive member, the substrate defines a first surface and a second surface opposite to the first surface. A decorative ink layer coats to the first surface of the substrate facing the interior of the electronic device, several LDS ink layers coat to the decorative ink layer, the LDS antennas are disposed on the corresponding LDS ink layers. The LDS antenna defines feed-in portion connecting with the conductive member, the conductive member comprises a flexible printed circuit and an anisotropic conductive adhesive connecting the flexible printed circuit and feed-in portion. Therefore, the transmission and reception of signal data can be realized through the connection between the flexible print circuit and the LDS antenna thereby enhance the effect of signal transmission and meet the needs of flexibility and miniaturization.