Coil Component Structure Balancing Q-Value and Mechanical Strength
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Solution Overview
Problem
Electronic components with insulative bodies and coil conductors face challenges in achieving high mechanical strength while maintaining high-frequency performance, as low dielectric constant materials used for high Q-values compromise mechanical integrity and lead to cracking.
Innovation Solution
The integration of a high-hardness layer with a higher filler content than the conductor-containing layer, positioned parallel to the mounting surface, enhances mechanical strength by providing additional structural support without compromising electrical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If an insulating material of low dielectric constant is used for the element body part, then a high Q-value is obtained, but the mechanical strength drops and cracks generate easily
Solution Approach 1:
The element body part is divided into two distinct layers: a conductor-containing layer with low dielectric constant material for high-frequency performance, and a high-hardness layer with high filler content for mechanical strength. This segmentation allows each layer to optimize its specific function without compromising the other.
Solution Approach 2:
Different regions of the element body part are assigned different material properties: the conductor-containing layer uses low dielectric constant material (higher silicon content) for electrical performance, while the high-hardness layer uses high filler content material (higher metal oxide or silicon oxide content) for mechanical support. Each layer has locally optimized quality for its specific role.
2Loss of energy
If the coil axis is oriented in parallel with the mounting surface, then high-frequency resistance loss decreases and Q-value increases, but mechanical strength is compromised
Solution Approach 1:
The element body part is constructed as a composite structure combining two different insulating materials: one optimized for electrical performance (low dielectric constant) and another optimized for mechanical properties (high hardness and filler content). This composite approach allows simultaneous achievement of high Q-value and mechanical strength.
Data Source
AI summary
In an exemplary embodiment, an electronic component includes: an element body part 10 constituted by an insulative body of rectangular solid shape; an internal conductor 30 provided inside the element body part 10; and external electrodes 50 provided at least on the bottom face 14 (mounting surface) of the element body part 10 and electrically connected to the internal conductor 30; wherein the element body part 10 has: a conductor-containing layer 20 in which a coil conductor 36 (functional part) that will become a part of the internal conductor 30 to demonstrate electrical performance, is provided; and a high-hardness layer 22 which is provided side by side with the conductor-containing layer 20 in a direction parallel with the bottom face 14 (mounting surface) of the element body part 10, and which has a higher hardness compared to the conductor-containing layer 20. The electronic component has improve mechanical strength.