Passive Device Cell Intermediary Layer Eddy Current Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In integrated circuits, passive devices formed on a substrate suffer from energy wastage due to induced eddy currents when current changes, which deteriorates their performance.
Innovation Solution
A passive device cell is designed with a substrate layer and an intermediary layer containing LC resonators or metamaterials between the substrate and the passive device, reducing eddy currents and enhancing performance by blocking magnetic field lines and stabilizing the fabrication process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If passive devices are formed directly on the substrate layer, then the fabrication process is simpler, but energy is wasted due to induced eddy currents in the substrate
Solution Approach 1:
An intermediary layer is introduced between the substrate and the passive device. This intermediary layer acts as a mediator that blocks magnetic field lines from reaching the substrate, thereby preventing eddy current induction while maintaining fabrication simplicity. The intermediary layer is formed using standard semiconductor processing techniques, making it an practical solution rather than a complex structural modification.
2Loss of energy
If high-resistance substrates are used to reduce eddy currents, then energy waste is reduced, but fabrication cost and complexity increase
Solution Approach 1:
Instead of modifying the substrate properties (which would increase cost and complexity), an intermediary layer is introduced that actively blocks magnetic field lines. This approach maintains the use of standard, cost-effective substrates while achieving the same energy-saving effect through the intermediary layer's magnetic field blocking capability.
Solution Approach 2:
The harmful function of the substrate (inducing eddy currents) is separated from the system by extracting the magnetic field interaction to the intermediary layer. The intermediary layer takes on the role of managing magnetic field interactions, allowing the substrate to be used in its standard, cost-effective form without the harmful eddy current effect.
3Loss of energy
If thick metal layers are used to reduce eddy currents, then energy waste is reduced, but device complexity and fabrication difficulty increase
Solution Approach 1:
The intermediary layer provides magnetic field blocking functionality without requiring thick metal layers. By using materials with appropriate magnetic properties in the intermediary layer, the same energy-saving effect is achieved with a much thinner and less complex structure than would be required using traditional thick metal shielding approaches.
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 intermediary layer decreases energy wastage, improves passive device performance, and makes the fabrication process more robust, reducing the need for high-resistance substrates and thick metals, while minimizing parasitic capacitances and fabrication costs.
Implementation Method 1
decreases energy wastage by blocking magnetic field lines from reaching the substrate
Implementation Method 2
The intermediary layer includes a plurality of LC resonators
Data Source
AI summary
An implementation of the invention is directed to a passive device cell having a substrate layer, and intermediary layer formed above the substrate layer, and a passive device formed above the intermediary layer. The intermediary layer includes a plurality of LC resonators and a plurality of segmented conductive lines, wherein the plurality of segmented conductive lines are disposed between the plurality of LC resonators.