Integrated RC Architecture with Bridging Contacts for Resistance Tuning
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Solution Overview
Problem
Existing RC networks face challenges in achieving a wide range of resistance values without significant variations due to limitations in substrate thickness and resistivity, leading to impractical manufacturing and performance issues, especially in high-temperature and high-voltage applications.
Innovation Solution
An integrated RC architecture with a substrate, a thin-film top electrode, an insulating layer, and distributed bridging contacts across the capacitor's surface area, allowing resistance value adjustment by varying the number of contacts, enabling consistent physical properties and performance across different resistance values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If discrete resistor and capacitor are soldered onto a printed circuit board, then the RC network can be implemented, but the surface area occupied is large and high inductive parasitics arise
Solution Approach 1:
The patent merges the resistor and capacitor into a single integrated component structure. The capacitor is formed with bottom and top electrodes separated by a dielectric layer, and the resistor is formed as a conductive layer between these electrodes. This integration eliminates the need for separate discrete components and their interconnections, thereby reducing the overall surface area occupied on the mounting board while maintaining the RC network functionality.
Solution Approach 2:
The integrated structure serves multiple functions simultaneously: the bottom electrode and dielectric form the capacitor, the conductive layer between electrodes provides resistance, and the top electrode serves as a common terminal. This multi-functionality within a single structure reduces the number of components needed and minimizes the surface area required for implementation.
2Ease of manufacture
If discrete resistor and capacitor are soldered onto a printed circuit board, then the RC network can be implemented, but high inductive parasitics arise
Solution Approach 1:
By merging the resistor and capacitor into a single integrated component with direct internal connections, the patent eliminates the need for external solder joints and interconnecting traces that generate inductive parasitics. The conductive layer directly connects the capacitor electrodes to the resistor, minimizing loop areas and reducing parasitic inductance compared to discrete component assembly.
3Device complexity
If integrated capacitor and resistor are implemented using regular 2D semiconductor technology, then integration is achieved, but the ability to provide high capacitance density in combination with high operating voltage is insufficient
Solution Approach 1:
The patent transitions from 2D planar capacitor structures to 3D vertical capacitor structures. The bottom electrode extends vertically, the dielectric layer is deposited conformally on the vertical surfaces, and the top electrode caps the structure. This vertical stacking increases the effective capacitance area without increasing the planar footprint, thereby achieving high capacitance density while maintaining integration with the resistor in a compact 3D structure capable of withstanding high operating voltages.
4Adaptability or versatility
If substrate thickness or resistivity is varied to achieve different resistance values, then resistance range is achieved, but manufacturing complexity and performance consistency deteriorate
Solution Approach 1:
The patent achieves different resistance values by varying parameters of the conductive layer (such as thickness, width, length, or material composition) rather than changing the substrate thickness or resistivity. This allows for precise control of resistance values while maintaining consistent substrate properties across all devices, simplifying the manufacturing process and ensuring performance consistency. The conductive layer can be patterned with different geometries or made from conductive materials with different sheet resistances to achieve the desired resistance range.
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 solution provides well-controlled resistance values with minimal temperature drift and reduced parasitic inductance, facilitating standardized manufacturing and integration while maintaining high performance and versatility in various power circuits.
Implementation Method 1
a set of plural bridging contacts traversing the insulating layer and electrically connecting the thin-film top electrode portion of the capacitor to the plate-shaped contact
Implementation Method 2
an insulating layer provided on the thin-film electrode portion of the capacitor
Data Source
AI summary
RC architectures are provided that include a substrate provided with a capacitor having a thin-film top electrode portion at a surface of the substrate on one side thereof. The resistance provided in series with the capacitor is controlled by providing a contact plate, spaced from the thin-film top electrode portion, and a set of plural bridging contacts extending between, and electrically interconnecting, the thin-film top electrode portion and the contact plate. Different resistance values can be set by appropriate selection of the number of bridging contacts. The capacitor can be a three-dimensional capacitor and contacts are then provided on respective first and second sides of the substrate, which face each other in the thickness direction of the substrate.