Magnetic Laminate Structure for Higher DC Superposition
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Solution Overview
Problem
Existing electronic components, such as thin film inductors, require improved DC superposition characteristics and reduced magnetic saturation, which current magnetic materials fail to achieve effectively.
Innovation Solution
A magnetic laminate structure is developed with alternately laminated magnetic and non-magnetic metal layers, where the non-magnetic layer contains elements like Cr, Ru, Rh, Ir, or Cu and has an average thickness of 0.4 nm to 1.5 nm, allowing the magnetic layers to be coupled in an antiparallel manner, and the magnetic layers contain amorphous material with nanocrystalline grains, enhancing anisotropic magnetic fields and suppressing magnetic saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional magnetic materials are used in thin film electronic components, then the component size and height are reduced, but the DC superposition characteristics deteriorate and magnetic saturation occurs
Solution Approach 1:
The magnetic layer is divided into multiple sub-layers with alternating magnetization directions (up-up-down-down pattern), creating a segmented magnetic structure that reduces net magnetic saturation while maintaining compact size. Each sub-layer contributes to the overall magnetic performance but with opposing orientations that cancel saturation effects
Solution Approach 2:
The invention uses a composite magnetic layer structure combining multiple magnetic sub-layers with different magnetization directions and compositions, creating a composite material system that achieves both small size and improved DC superposition characteristics through the synergistic effect of alternating magnetic orientations
2Reliability
If magnetic saturation is suppressed by increasing anisotropic magnetic field, then DC superposition characteristics improve, but the device complexity increases
Solution Approach 1:
The invention changes the magnetization direction parameter of adjacent magnetic sub-layers to be opposite (antiparallel), creating an alternating up-up-down-down pattern. This parameter change increases the anisotropic magnetic field and suppresses magnetic saturation, improving DC superposition characteristics while maintaining a relatively simple layered structure
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 results in further suppressed magnetic saturation and improved DC superposition characteristics, enhancing the frequency characteristics of electronic components like thin film inductors by increasing the anisotropic magnetic field and resonant frequency.
Implementation Method 1
the magnetic metal layers being coupled in an antiparallel manner with the non-magnetic metal layer interposed therebetween
Implementation Method 2
enhancing anisotropic magnetic fields and suppressing magnetic saturation
Implementation Method 3
a material having a high magnetic permeability and a high saturation magnetic flux density is required
Data Source
AI summary
A magnetic laminate having further suppressed magnetic saturation and higher DC superposition characteristics, a magnetic structure including the same, and an electronic component including the magnetic laminate or the magnetic structure. A magnetic laminate in which magnetic metal layers and non-magnetic metal layers are alternately laminated, wherein the non-magnetic metal layer is disposed between the magnetic metal layers; the magnetic metal layer contains an amorphous material; and the non-magnetic metal layer contains at least one element selected from the group consisting of Cr, Ru, Rh, Ir, Re, and Cu, and has an average thickness of 0.4 nm or more and 1.5 nm or less (i.e., from 0.4 nm to 1.5 nm).