Stacked Eight-Shaped Inductor Layout for Higher Inductance Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing inductor devices, such as spiral and eight-shaped inductors, face limitations in mutual inductance and coupling efficiency, with eight-shaped inductors occupying large areas and having low inductance per unit area, restricting their applications.
Innovation Solution
The design incorporates a stacked structure with overlapping wires, featuring an eight-shaped inductor structure formed by multiple sub-wires arranged in specific patterns and directions, enhancing inductance per unit area and canceling common mode inductance while increasing differential mode inductance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an eight-shaped inductor is used to reduce mutual inductance and coupling, then the coupling between coils is reduced, but the device occupies a large area
Solution Approach 1:
The patent transitions from a planar eight-shaped inductor to a three-dimensional stacked configuration where multiple inductor layers are vertically arranged and interconnected. This dimensional change allows the inductor to achieve compact footprint while maintaining low mutual inductance through optimized inter-layer coupling structures
Solution Approach 2:
The patent implements a nested structure where multiple inductor loops are stacked vertically with interconnections that allow inner loops to be electrically connected to outer loops. This nesting approach maximizes the use of vertical space, reducing the horizontal area occupied while preserving the low mutual inductance characteristic
2Stability of the object's composition
If a traditional stacked eight-shaped inductor is used to achieve good symmetry, then the symmetry is improved, but the inductance value per unit area is low
Solution Approach 1:
The patent divides the inductor into multiple segmented loops arranged in a stacked configuration, where each loop contributes to the total inductance. By segmenting the inductor structure into multiple functional units that can be vertically stacked, the design achieves both symmetry through careful arrangement and increased inductance density through the cumulative effect of multiple segments
Solution Approach 2:
The patent employs composite conductor structures combining multiple metal layers with different properties, optimized for both symmetry and inductance enhancement. The composite structure allows simultaneous achievement of symmetric geometric arrangement for stability and optimized electromagnetic characteristics for higher inductance per unit area
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 achieves a high inductance value per unit area and improves circuit characteristics in differential mode, while minimizing common mode inductance, thus expanding the scope of inductor device applications.
Implementation Method 1
the inductance value is canceled in the common mode and increased in the differential mode
Data Source
AI summary
An inductor device includes a first wire, a second wire, a third wire, a fourth wire and an 8-shaped inductor structure. The first wire is disposed in a first area. The second wire is disposed in a second area. The third wire is disposed in the first area and at least partially overlapped with the first wire in a vertical direction. The third wire includes at least two third sub-wires, and the at least two third sub-wires are arranged with an interval between each other. The fourth wire is at least partially overlapped with the second wire in the vertical direction. The fourth wire includes at least two fourth sub-wires, and the at least two fourth sub-wires are arranged with an interval between each other. The eight-shaped inductor structure is disposed on an outer side of the third wire and the fourth wire.