Integrated Capacitor-Coil Layout for RF Coupling Across Voltage Domains
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Solution Overview
Problem
Existing apparatuses with capacitors and coils for voltage domain isolation require additional space and complexity due to discrete components, making them challenging for efficient DC isolation and RF signal transmission across different voltage domains.
Innovation Solution
A substrate-based apparatus with conductive pads and coils in multiple layers, utilizing dielectric materials and BEOL processes to form capacitors and coils, allowing for compact integration and efficient coupling between circuit sections across different voltage domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If discrete capacitors and coils are used for voltage domain isolation, then DC isolation and RF signal transmission are achieved, but space requirements increase and assembly complexity increases
Solution Approach 1:
The patent combines discrete capacitors and coils into an integrated apparatus where capacitive elements and inductive elements are merged into a single compact structure. The capacitive element with conductive plates and the inductive element with conductive windings are integrated within the same housing, allowing both DC isolation and RF signal transmission functions to be achieved in one component rather than requiring separate discrete components.
Solution Approach 2:
The patent implements a nested configuration where the capacitive element is positioned within or alongside the inductive element. The conductive plates of the capacitive element are arranged between the windings of the inductive element, creating a compact nested structure that reduces overall space requirements while maintaining both isolation and signal transmission capabilities.
2Reliability
If discrete capacitors and coils are used for voltage domain isolation, then DC isolation and RF signal transmission are achieved, but assembly complexity increases
Solution Approach 1:
The patent merges multiple discrete components into a single integrated apparatus with a unified housing that contains both capacitive and inductive elements. This integration eliminates the need for separate assembly steps for mounting discrete capacitors and coils, reducing assembly complexity while maintaining reliable DC isolation and RF signal transmission.
Solution Approach 2:
The integrated apparatus serves multiple functions simultaneously: it provides DC isolation, transmits RF signals, and offers common-mode rejection all within a single component. This multi-functionality reduces the number of components that need to be assembled and configured, thereby reducing overall assembly complexity.
3Area of stationary object
If integrated capacitors and coils are used, then space requirements are reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs different conductive materials and structural configurations in different regions of the integrated apparatus. The capacitive element uses conductive plates with specific geometries optimized for capacitance, while the inductive element uses windings with specific patterns optimized for inductance. This localized optimization allows each element to achieve its required electrical properties within the compact integrated structure.
Solution Approach 2:
The patent adjusts key parameters such as the spacing between conductive plates, the number of windings, the core material properties, and the geometric dimensions of conductive elements to optimize the electrical characteristics of both capacitive and inductive components. By carefully controlling these parameters during manufacturing, the apparatus achieves the required performance in a compact form factor.
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
Enables effective DC isolation and RF signal transmission while reducing space requirements and assembly complexity, ensuring reliable common-mode rejection and efficient voltage domain coupling.
Implementation Method 1
the capacitors can be used to decouple DC voltages, while AC signals, in particular radio-frequency (RF) signals, can be transmitted
Implementation Method 2
Apparatuses that comprise a capacitor and a coil are used for various applications, for example for resonant circuits
Implementation Method 3
In the case of a differential configuration, in which differential signals are transmitted, a filter containing coils and also capacitors can then be used to bring about common-mode rejection
Data Source
AI summary
An apparatus is provided that includes a substrate. In addition, the apparatus includes a first electrically conductive path arranged in a second layer above the substrate and forming a first connection of the apparatus, and a second electrically conductive pad arranged in the second layer and forming a second connection of the apparatus. An electrically conductive element is arranged in a first layer spaced apart from the second layer. The electrically conductive element forms a first capacitor with either the first pad or the second pad. In addition, a first coil is arranged in the first layer, the second layer, or in both layers. A first end of the first coil is connected to the second pad.