Dielectric Substrate with Laser-Treated Regions for RF Wave Decay
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Solution Overview
Problem
High-frequency electronic devices face challenges in reducing manufacturing costs while minimizing the decay of electromagnetic waves during propagation, which is exacerbated by the special features of high-frequency operation.
Innovation Solution
A high-frequency electronic device design featuring a dielectric substrate with distinct etching rates in different regions, where a first region with higher crystallinity and lower loss tangent is treated with a laser, allowing for a patterned metal layer that reduces electromagnetic wave decay, and a second region with lower crystallinity, enabling efficient high-frequency transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a uniform dielectric substrate is used, then manufacturing process is simple, but electromagnetic wave decay is high due to higher loss tangent
Solution Approach 1:
The dielectric substrate is divided into a first region with higher crystallinity and lower loss tangent, and a second region with lower crystallinity. The first region is specifically treated with laser irradiation to enhance crystallinity locally where electromagnetic wave propagation occurs, reducing energy loss without requiring the entire substrate to be highly crystalline, thus balancing performance and manufacturing complexity.
Solution Approach 2:
The crystallinity parameter of the dielectric substrate is changed through selective laser irradiation in the first region. This changes the physical and chemical properties of the substrate material, resulting in a lower loss tangent and reduced electromagnetic wave decay in the irradiated region while maintaining manufacturing feasibility.
2Loss of energy
If the entire dielectric substrate is treated to achieve high crystallinity, then electromagnetic wave decay is reduced, but manufacturing cost increases
Solution Approach 1:
Instead of treating the entire substrate uniformly, only the first region where electromagnetic wave propagation occurs is treated with laser irradiation. This localized treatment achieves the necessary low loss tangent where needed while avoiding the high manufacturing costs associated with treating the entire substrate, thus resolving the contradiction between performance and cost.
Solution Approach 2:
The laser irradiation treatment is applied partially to only the necessary region (first region) rather than the entire substrate. This partial action is sufficient to achieve the desired reduction in electromagnetic wave decay without incurring the excessive costs of full-substrate treatment, optimizing the balance between performance improvement and manufacturing cost.
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 effectively reduces the decay rate of electromagnetic waves and lowers manufacturing costs by utilizing a dielectric substrate with selectively treated regions, optimizing the substrate's crystallinity for improved high-frequency transmission.
Implementation Method 1
A laser is applied to a first region of the dielectric substrate but not a second region adjacent to the first region of the dielectric substrate
Data Source
AI summary
A high-frequency electronic device including a dielectric substrate, a first patterned metal layer and a second patterned metal layer is provided. The dielectric substrate has a first region and a second region. The first patterned metal layer is disposed on a first side of the dielectric substrate and corresponds to the first region, wherein the first region and the second region have different etching rates with respect to an etching solution. The second patterned metal layer is disposed on the first side or a second side opposite to the first side of the dielectric substrate.