Laminated Coil Component with Overlapping Openings
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Solution Overview
Problem
In the miniaturization of electronic devices, the proximity of multiple coils leads to unnecessary coupling, which deteriorates their characteristics, and existing solutions like inserting a ground conductor layer between coil layers result in significant space requirements and reduced Q values.
Innovation Solution
A laminated coil component design where the first coil conductor pattern generates a magnetic flux in one direction and the second coil conductor pattern generates fluxes in both the same and opposite directions, allowing for overlapping coil openings to reduce interlayer distance and minimize coupling, enabling coils to be arranged closely without significant interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a ground conductor layer is inserted between the layers of each coil conductor pattern to reduce coupling, then the coupling between coils is reduced, but the Q value deteriorates and large space is required between the coil conductor pattern and ground conductor layer
Solution Approach 1:
An insulating layer is introduced as an intermediary between the first and second coil conductor patterns. This insulating layer has a permeability coefficient μr of 1.05 to 1.2, which is specifically controlled to minimize magnetic coupling while avoiding the Q value deterioration caused by ground conductor layers. The insulating layer acts as a magnetic field mediator that reduces coupling effects without the adverse impacts of ground conductor insertion.
Solution Approach 2:
The permeability coefficient μr of the insulating layer is precisely controlled within the range of 1.05 to 1.2. By adjusting this magnetic parameter, the invention achieves optimal balance between reducing coupling and maintaining Q value. This parameter control allows the insulating layer to provide magnetic shielding effects without causing significant energy loss or Q value deterioration.
2Volume of moving object
If multiple coils are arranged in proximity to achieve miniaturization, then the device size is reduced, but unnecessary coupling between adjacent coils increases
Solution Approach 1:
The first and second coil conductor patterns are arranged in a nested configuration on different insulating layers, with their openings overlapping in the plan view. This nested arrangement allows the coils to be positioned in close proximity while the insulating layer between them provides magnetic decoupling. The overlapping opening arrangement combined with the specific permeability insulating layer enables miniaturization without excessive coupling.
Solution Approach 2:
The insulating layer with controlled permeability (μr = 1.05 to 1.2) serves as a magnetic intermediary between closely spaced coil conductor patterns. This intermediary structure enables the coils to be arranged in proximity for miniaturization while maintaining low coupling levels, as the insulating layer modulates the magnetic field interaction between adjacent coils.
3Device complexity
If the interlayer distance between coil conductor patterns is reduced to increase integration, then the device complexity is reduced, but coupling between coils increases
Solution Approach 1:
The permeability coefficient μr of the insulating layer is precisely controlled within the range of 1.05 to 1.2 to compensate for reduced interlayer distance. By adjusting this magnetic parameter, the invention maintains low coupling levels even when coils are positioned close together, enabling high integration without excessive coupling. The parameter control of the insulating layer material allows interlayer distance reduction while preventing coupling increase.
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 configuration significantly reduces or prevents unnecessary coupling between coils, allowing for a compact arrangement of multiple coils while maintaining desired inductance, and allows for precise control of coupling strength, facilitating the creation of small matching circuits with band pass filters and transformer impedance conversion circuits.
Implementation Method 1
the first coil conductor pattern defines a coil opening that generates a magnetic flux in a first direction
Implementation Method 2
the second coil conductor pattern defines a first coil opening that generates a magnetic flux in the first direction and a second coil opening that generates a magnetic flux in a second direction opposite to the first direction
Implementation Method 3
even if a magnetic flux penetrates a coil defined by the first coil conductor pattern and a coil defined by the second coil conductor pattern, both of the coils are in an uncoupled state or in a relatively weak coupled state
Data Source
AI summary
In a laminated coil component, first coil conductor patterns define a coil opening that generates a magnetic flux in a first direction, second coil conductor patterns define a first coil opening that generates a magnetic flux in the first direction, and a second coil opening that generates a magnetic flux in a second direction. A difference in area between the first coil opening and the second coil opening determines a degree of coupling of the coil defined by the first coil conductor pattern and the coil defined by the second coil conductor pattern. This provides a close proximal arrangement of a plurality of coils proximally while significantly reducing or preventing unnecessary coupling between the coils.