Coil Component with Non-Parallel Axes for Reduced Coupling
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Solution Overview
Problem
The challenge is to reduce the size and thickness of coil components in electronic devices while maintaining their magnetic characteristics, and to minimize the area occupied by the coil component, which is difficult due to limitations in increasing the magnetic material ratio in the core and the need to reduce the coupling coefficient between coil units.
Innovation Solution
A coil component design featuring non-parallel core axes for two types of coil units, one being a thin-film type and the other a wire-wound type, with external electrodes and an insulating portion, allowing for reduced coupling without increasing the distance between coil units, thereby achieving size reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ratio of magnetic material in the core is increased to maintain magnetic characteristics in reduced-size coil components, then magnetic performance is improved, but frequency characteristics change due to limitations in increasing magnetic material ratio
Solution Approach 1:
The patent divides the coil component into multiple independent coil units (first coil unit and second coil unit) with different configurations. Each coil unit has its own support member and coil pattern arrangement, allowing independent optimization of magnetic material ratio and frequency characteristics for each unit while maintaining overall magnetic performance
2Reliability
If the distance between coil units is increased to reduce the coupling coefficient, then coupling coefficient is reduced, but the size of the coil component increases
Solution Approach 1:
The patent employs asymmetric configurations of the coil units, where the first coil unit has a different structural arrangement than the second coil unit. This asymmetry allows the coil units to be positioned closer together while maintaining low coupling through differences in their magnetic field orientations and distributions rather than relying solely on increased distance
3Volume of moving object
If the size and thickness of coil components are reduced to meet electronic device requirements, then device integration is improved, but it becomes difficult to maintain magnetic characteristics and reduce coupling coefficient simultaneously
Solution Approach 1:
The patent transitions from a single-plane coil configuration to a three-dimensional arrangement with coil units positioned at different heights and orientations within the compact body. The first and second coil units are disposed at different positions in the vertical direction, utilizing the third dimension to achieve low coupling and maintain magnetic performance within a reduced footprint
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 effectively reduces the coupling coefficient between coil units, enabling smaller coil components without increasing size, while maintaining magnetic performance.
Implementation Method 1
a first coil unit disposed in the body, and including a support member and a coil pattern disposed on at least one surface of the support member
Implementation Method 2
a second coil unit disposed in the body, and including a wire-wound type coil
Implementation Method 3
there is a limit in increasing the ratio of the magnetic material in the core to be filled with the magnetic material
Data Source
AI summary
A coil component includes a body including a first surface and a second surface disposed to oppose each other in a first direction, a first coil unit disposed in the body, and including a support member and a coil pattern disposed on at least one surface of the support member, a second coil unit disposed in the body, and including a wire-wound type coil; and a plurality of external electrodes connected to the first and second coil units, wherein a core axis of the first coil unit is not parallel to a core axis of the second coil unit.