Multilayer Coil Component Layout for Miniaturized Inductor Performance
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Solution Overview
Problem
The reduction in size and thickness of coil components for electronic devices poses a challenge in maintaining equivalent electrical properties, as increasing the ratio of magnetic material in the core is limited by the strength of the inductor body and changes in frequency properties.
Innovation Solution
A coil component design featuring a body with a support member, two coils connected by conductive vias, and external electrodes, where the line width of pads is greater than the connection portions, ensuring improved structural and electrical connectivity and sufficient core size for enhanced magnetic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size and thickness of the coil component are reduced, then the component can be miniaturized for electronic devices, but the electrical properties and magnetic performance deteriorate
Solution Approach 1:
The patent transitions from a single-layer coil structure to a multi-layer stacked structure with first and second coils wound in different directions around a support member. This dimensional change allows the component to maintain electrical properties while reducing overall footprint area, enabling miniaturization without sacrificing performance.
Solution Approach 2:
The patent employs a composite structure combining magnetic cores with specific permeability values (first core: 100-200, second core: 200-300) and copper coils wound in opposite directions. This composite material approach optimizes magnetic performance while maintaining electrical properties in a compact form factor.
2Reliability
If the ratio of magnetic material in the core is increased to maintain magnetic properties, then magnetic performance improves, but the strength of the inductor body deteriorates due to structural limitations
Solution Approach 1:
The patent divides the magnetic core into separate first and second cores with different permeability ranges (100-200 and 200-300 respectively). This segmentation allows optimization of magnetic properties in each layer while distributing structural stress, preventing body strength deterioration even with high magnetic material ratios.
Solution Approach 2:
Different regions of the magnetic path are assigned different core materials with optimized permeability values. The first core uses material with permeability 100-200 while the second core uses material with permeability 200-300, creating local quality variations that optimize both magnetic performance and structural integrity in different areas.
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 design improves electrical properties and magnetic performance while enabling miniaturization, maintaining excellent properties and core size, thus addressing the limitations of reduced size and thickness in coil components.
Implementation Method 1
a plurality of conductive vias connecting the first coil to the second coil
Implementation Method 2
a first coil disposed on one surface of the support member, a second coil disposed on the other surface of the support member
Data Source
AI summary
A coil component includes a body, a support member disposed in the body, a first coil disposed on one surface of the support member, a second coil disposed on the other surface of the support member, a plurality of conductive vias connecting the first coil to the second coil, a first external electrode disposed on the body and connected to one end of the first coil, and a second external electrode disposed on the body and connected to one end of the second coil, wherein the first coil includes a plurality of first pads connected to the plurality of conductive vias and a first connection portion disposed between the plurality of first pads, and a line width of at least one of the plurality of first pads is greater than a line width of the first connection portion.