Wiring Substrate Transformer With Stacked Plane Coils
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Solution Overview
Problem
Conventional transformer designs lack design flexibility as they either require adjusting self-inductance when modifying mutual inductance or increase the layout area to achieve desired magnetic coupling, which is not suitable for miniaturized electronic products integrated into wiring substrates.
Innovation Solution
A transformer design with a first and second plane coil, where inner loops are positioned to vary the overlapping area without affecting the positions of outer loops, allowing for adjustable mutual inductance without altering self-inductance, and configured within a wiring substrate to maintain compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the distance between two plane coils is adjusted to change mutual inductance, then mutual inductance is adjusted, but the layout area increases
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement to a three-dimensional stacked configuration. The first and second plane coils are positioned on different layers of the wiring substrate, with conductive vias providing vertical connections. This dimensional change allows the coils to be closer in terms of magnetic coupling while maintaining a compact footprint on the substrate, thereby adjusting mutual inductance without significantly increasing the layout area.
Solution Approach 2:
The patent employs a nested structure where the first plane coil and second plane coil are arranged in overlapping configurations. The loops of the two coils are positioned such that they interleave vertically, with some loops of the first coil positioned between loops of the second coil and vice versa. This nesting arrangement maximizes magnetic coupling efficiency within a minimized spatial footprint.
2Adaptability or versatility
If the sizes of two plane coils are adjusted to change mutual inductance, then mutual inductance is adjusted, but self-inductance also changes
Solution Approach 1:
The patent divides each plane coil into multiple loops that can be independently positioned and configured. The first plane coil includes multiple first loops, and the second plane coil includes multiple second loops. By selectively adjusting the positioning and configuration of individual loops or loop bundles, the design enables independent optimization of mutual inductance and self-inductance parameters, providing enhanced design flexibility.
Solution Approach 2:
The patent implements local quality by allowing different segments of the coils to have different configurations. The loops are sequentially arranged with varying positions and orientations, enabling local adjustments to magnetic coupling characteristics without uniformly changing the entire coil structure. This localized control allows precise tuning of mutual inductance while maintaining stable self-inductance values.
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 design provides improved flexibility in adjusting mutual inductance without affecting self-inductance and minimizing the layout area, enhancing the transformer's performance in miniaturized electronic components.
Implementation Method 1
mutual inductance can be obtained by mutual coupling magnetic field between two inductors of a transformer
Data Source
AI summary
A transformer, adapted for being configured in a wiring substrate, is provided. The transformer includes a first plane coil and a second plane coil. The first plane coil includes a plurality of first loops. The second plane coil includes a plurality of second loops. A first bundle constituted by at least two adjacent first loops and a second bundle constituted by at least two adjacent second loops are stridden one over another.