Antenna Circuit Board Layout for Uniform Bonding Conductivity
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Solution Overview
Problem
Existing bonding intermediate films used to couple antennas with circuit boards suffer from non-uniform distribution of resin and conductive particles, leading to degraded adhesive strength and conductivity due to deviations during heat-pressing processes.
Innovation Solution
A circuit board design featuring a co-planar ground with line patterns around signal wiring, which acts as a buffer to evenly distribute heat and pressure, enhancing adhesive strength and conductivity through the use of a bonding intermediate film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bonding intermediate film is used to couple the antenna and the circuit board, then adhesive strength and conductivity are provided, but non-uniform distribution of resin material and conductive particles occurs during heat-pressing process, degrading both adhesive strength and conductivity
Solution Approach 1:
The co-planar ground is segmented into multiple line patterns arranged in parallel. This segmentation allows the bonding intermediate film to be applied more uniformly across each individual line pattern, preventing the non-uniform distribution of resin material and conductive particles that occurs when bonding over a large continuous area. The segmented structure enables better control of the heat-pressing process across the bonding interface.
Solution Approach 2:
The co-planar ground structure provides different local properties: the line patterns provide bonding surfaces with controlled geometry for uniform material distribution, while the spaces between lines allow for heat and pressure dissipation. This local quality differentiation ensures that the bonding intermediate film achieves consistent adhesive strength and conductivity across the bonding interface.
2Reliability
If a bonding intermediate film is used to couple the antenna and the circuit board, then adhesive strength and conductivity are provided, but deviation of conductive activation occurs during heat-pressing process, degrading conductivity
Solution Approach 1:
The co-planar ground is divided into multiple discrete line patterns, which segments the conductive path into multiple parallel channels. This segmentation ensures that conductive activation occurs uniformly across all line patterns during the heat-pressing process, preventing deviations in conductivity that would occur with a single large bonding area.
Solution Approach 2:
The line pattern geometry (width, spacing, length) is specifically designed to control the thermal and electrical parameters during bonding. By adjusting these geometric parameters, the heat-pressing process achieves uniform conductive activation across all line patterns, ensuring consistent conductivity throughout the bonding 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
The design improves physical and electrical reliability of the bonding structure by ensuring uniform adhesive force and conductivity, maintaining mechanical and electrical stability of the antenna package.
Implementation Method 1
The line patterns may serve as buffer patterns for evenly distributing heat and pressure during a bonding process using a bonding intermediate film
Data Source
AI summary
A circuit board for an antenna may include a core layer, a signal wiring disposed on a surface of the core layer, and a co-planar ground disposed around the signal wiring on the surface of the core layer. The co-planar ground may include line patterns adjacent to a front end portion of the signal wiring.