8-Shaped Inductive Coil Device Area Reduction
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Solution Overview
Problem
Current integrated circuit designs require a reduction in the area of 8-shaped inductive coil devices without compromising inductance, as they are typically larger than needed.
Innovation Solution
The design incorporates a first spiral coil, a second spiral coil, and a connection segment structure with metal segments and crossing connection segments at different layers, electrically coupling terminals to reduce the width and area of the coil while maintaining inductance by using a stack design with overlapping metal layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a conventional 8-shaped inductive coil device is used, then the inductance is maintained, but the area occupied is larger than needed
Solution Approach 1:
The patent applies dimensionality change by transitioning from a planar 8-shaped coil to a three-dimensional stacked coil structure. Multiple coil layers are stacked vertically with magnetic cores positioned between them, effectively utilizing the vertical dimension (z-axis) to increase inductance without expanding the horizontal footprint. This stacked configuration allows the magnetic flux to pass through multiple layers, thereby increasing the overall inductance while maintaining a compact area.
Solution Approach 2:
The patent implements nesting by placing magnetic cores within the stacked coil structure. The magnetic cores are positioned between adjacent coil layers, nested within the overall device structure. This nested arrangement enhances the magnetic coupling between layers and increases the effective inductance without requiring additional external space, as the magnetic cores are integrated within the existing coil footprint.
2Area of stationary object
If the area of the inductive coil device is reduced, then the integration density increases, but the inductance may be affected
Solution Approach 1:
The patent achieves higher inductance per unit area by exploiting the vertical dimension through stacked coil layers. Instead of expanding the coil horizontally to increase inductance, the design stacks multiple layers vertically, each contributing to the total inductance. This approach effectively increases the inductance density (inductance per unit area) by utilizing the third dimension, thereby improving productivity without sacrificing area efficiency.
Solution Approach 2:
The patent employs composite structures by combining multiple coil layers with magnetic cores in a stacked configuration. This composite arrangement creates a synergistic effect where the magnetic cores enhance the magnetic permeability and coupling between layers, resulting in higher inductance per unit area compared to a single-layer coil. The composite structure optimizes the inductance-to-area ratio by integrating different functional elements (coils and magnetic cores) in a compact vertical stack.
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 effectively reduces the width and area of the 8-shaped inductive coil device while maintaining or increasing inductance, suitable for both inductor and transformer applications, and can be adapted to various loop configurations.
Implementation Method 1
The inductors are electrical components configured to generate electromotive force due to the change of the amount of current passing through to resist the change of the amount of current
Implementation Method 2
The transformers are devices configured to increase or decrease a voltage by applying the law of electromagnetic induction
Data Source
AI summary
An 8-shaped inductive coil device that includes a first and a second spiral coils and a connection segment structure is provided. The first spiral coil includes first metal segments and crossing connection segments disposed at a first and a second metal layers respectively and includes first connection terminals. The second spiral coil includes second connection terminals. The connection segment structure electrically couples the first and the second connection terminals. The first and the second spiral coils are disposed along an imaginary line passing through a central region of each of ranges surrounded by the first and the second spiral coils. The connection segment structure and the crossing connection segments electrically couple the part of the first metal segments substantially vertical to the imaginary line, and the connection segment structure and the crossing connection segments are disposed substantially on the imaginary line.