Coil Component With Perpendicular Magnetic Particles
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Solution Overview
Problem
Current electronic components face challenges in achieving high inductance and Q value in the high-frequency GHz band due to limitations in magnetic loss and permeability, necessitating the development of coil and LC composite components with improved magnetic properties.
Innovation Solution
A coil component and LC composite component utilizing a composite magnetic material with magnetic particles having a specific average minor-axis length and aspect ratio, oriented perpendicularly to the coil axis and randomly within a perpendicular plane, and a saturation magnetization of 80 emu/g or more, which includes Fe and/or Co and an oxygen-containing layer, enhance inductance and Q value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If magnetic particles with high aspect ratio (3 or more and less than 60) are used, then permeability is improved, but manufacturing precision and orientation control become more difficult
Solution Approach 1:
The patent changes the aspect ratio parameter of magnetic particles from the conventional range (3-60) to a specific range (2.0 or more and 10.0 or less), which balances permeability improvement with manufacturability. This parameter optimization allows particles to achieve adequate magnetic performance while being easier to orient and manufacture
Solution Approach 2:
The patent applies local quality by orienting magnetic particles perpendicular to the coil axis in the high-frequency region, creating a specific orientation pattern that optimizes inductance and Q value. This localized orientation strategy addresses the manufacturing difficulty by providing a clear, achievable orientation target
2Area of stationary object
If magnetic particles with larger size are used, then permeability increases, but Q value decreases due to increased magnetic loss
Solution Approach 1:
The patent optimizes the size parameter of magnetic particles by specifying an average minor-axis length of more than 5.0 nm and 50 nm or less. This size range balances permeability (which benefits from larger particles) with Q value (which suffers from magnetic loss in larger particles), achieving both high inductance and low magnetic loss
Solution Approach 2:
The patent uses composite magnetic material containing Fe and/or Co with saturation magnetization of 80 emu/g or more, combining multiple elements to achieve optimal magnetic properties that balance permeability and loss characteristics
3Speed
If saturation magnetization is increased to improve inductance, then inductance increases, but manufacturing complexity increases
Solution Approach 1:
The patent sets saturation magnetization at 80 emu/g or more, which is achievable with conventional Fe and/or Co-based materials. This parameter level provides high inductance without requiring exotic or difficult-to-manufacture materials, maintaining manufacturing simplicity
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 described configuration significantly increases inductance and Q value in the high-frequency region, addressing the limitations of existing components by optimizing magnetic particle orientation and material composition.
Implementation Method 1
a composite magnetic material containing magnetic particles... the composite magnetic material has a saturation magnetization σs of 80 emu/g or more
Data Source
AI summary
A coil component includes a coil and a composite magnetic material containing magnetic particles. The magnetic particles have an average minor-axis length of more than 5.0 nm and 50 nm or less and an average aspect ratio of 2.0 or more and 10.0 or less. The magnetic particles are orientated substantially perpendicularly to a central axis of the coil and are orientated randomly within a perpendicular plane to the central axis of the coil. The composite magnetic material has a saturation magnetization σs of 80.0 emu/g or more.