Sensing Coil Overlap Layout for Selective Semiconductor Coupling
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Solution Overview
Problem
In semiconductor technology, existing inductor/transformer designs face challenges in signal coupling efficiency due to differences in the number of turns between coils, where coils with fewer turns often experience reduced coupling effectiveness compared to those with more turns.
Innovation Solution
A semiconductor device configuration that includes a first coil, a second coil, and a third sensing coil, where the overlapped area between the third coil and the first coil is larger than between the third coil and the second coil, enhancing coupling between the sensing coil and the first coil while minimizing the impact on the second coil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of turns of a coil is increased to improve signal coupling, then coupling effectiveness is improved, but device complexity and area increase
Solution Approach 1:
The patent applies local quality by creating non-uniform overlapping areas between coils. Specifically, the first overlapping area between the third coil and first coil is made larger than the second overlapping area between the third coil and second coil. This localized variation in overlap area allows different coupling strengths for different coil pairs, enabling selective signal coupling without requiring all coils to have uniform high-turn configurations.
Solution Approach 2:
The patent transitions from considering only the number of turns (one-dimensional parameter) to incorporating spatial overlapping area (two-dimensional parameter) as a key factor in coupling effectiveness. By controlling the overlapping area between coils in the vertical dimension, the patent achieves enhanced coupling for the first coil without necessarily increasing the number of turns, thus resolving the contradiction between coupling effectiveness and device complexity.
2Reliability
If the overlapping area between sensing coil and first coil is increased to enhance coupling, then signal coupling is improved, but the area occupied by the device increases
Solution Approach 1:
The patent implements local quality by concentrating the overlapping area enhancement specifically between the third sensing coil and the first coil, while maintaining a smaller overlapping area between the third coil and second coil. This localized approach ensures that the area increase is targeted only where needed for enhanced coupling, rather than uniformly increasing the area of all coils or their mutual overlaps throughout the device.
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 enhances signal coupling between the sensing coil and the first coil with fewer turns, improving overall performance in specific applications by maintaining effective coupling without affecting the second coil.
Implementation Method 1
The third coil is configured to sense a signal on the first coil
Implementation Method 2
A first capacitor value between the third coil and the first coil is larger than a second capacitor value between the third coil and the second coil
Data Source
AI summary
A semiconductor device includes a first coil, a second coil, and a third coil. The second coil is disposed with respect to the first coil. The third coil is configured to sense a signal on the first coil. A first overlapped area, on a projection plane, of the third coil and the first coil is larger than a second overlapped area, on the projection plane, of the third coil and the second coil.