Multi-Sectional Capacitor for High-Frequency Decoupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Decoupling capacitors embedded in PCBs or IC substrates face increased impedance and reduced decoupling performance at higher frequencies, making it difficult to stabilize power supply and broaden decoupling bandwidth in electronic devices with high signal transmission speeds.
Innovation Solution
A capacitive device with multiple conductive step sections of different heights and insulating regions, including slots on the electrodes, which allows for tunable capacitance and improved decoupling performance by optimizing the capacitive structure and enhancing the capacitive properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If decoupling capacitors are embedded in PCBs or IC substrates, then the decoupling performance is improved at low frequencies, but the impedance increases and decoupling performance deteriorates at high frequencies
Solution Approach 1:
The capacitor structure is divided into multiple conductive sections with different heights, creating multiple capacitive regions. This segmentation allows each region to contribute to different frequency ranges, effectively broadening the overall decoupling bandwidth while maintaining low impedance across a wider frequency spectrum.
Solution Approach 2:
The patent introduces vertical dimensionality by creating conductive sections at different heights within the substrate. This multi-level structure adds a vertical dimension to the traditional planar capacitor design, enabling improved electromagnetic field distribution and reduced impedance at high frequencies.
2Speed
If signal transmission speed is increased in ICs, then the processing capability is improved, but power noises and ground bounces increase causing interference
Solution Approach 1:
The embedded decoupling capacitors are positioned and configured in advance within the PCB or IC substrate to proactively counteract power noises and ground bounces before they can interfere with high-speed signal transmission. The capacitors are strategically placed near power/ground pins to provide immediate local decoupling.
Solution Approach 2:
The decoupling capacitors act as intermediary elements between the power delivery network and the high-speed digital circuits. They provide a localized energy reservoir that mediates the interaction between power supply fluctuations and sensitive high-speed signal paths, isolating the harmful effects.
3Ease of manufacture
If traditional SMD capacitors are used, then the implementation is simple, but parasitic inductances increase at high frequencies
Solution Approach 1:
The capacitor structure is nested within the PCB or IC substrate itself, with conductive sections formed at different vertical levels. This nested configuration minimizes the current loop area and reduces parasitic inductance by embedding the capacitor structure within the existing substrate layers rather than using external SMD components.
Solution Approach 2:
The patent transitions from a two-dimensional SMD capacitor layout to a three-dimensional embedded structure with conductive sections at multiple heights. This vertical stacking reduces the effective current loop area and minimizes parasitic inductance while maintaining ease of manufacture through standard PCB fabrication processes.
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 capacitive device effectively reduces impedance and broadens the decoupling bandwidth, stabilizing power supply and improving noise reduction in high-frequency electronic systems.
Implementation Method 1
capacitor device having multi-sectional conductors... A capacitive device includes a first electrode and a second electrode below the first electrode and spaced apart from the first electrode
Implementation Method 2
an insulating region between the first electrode and the second electrode
Data Source
AI summary
A capacitive device is provided. The capacitive device includes a first electrode and a second electrode below the first electrode and spaced apart from the first electrode, wherein at least one of the first electrode and the second electrode includes a plurality of conductive step sections, the plurality of conductive step sections having different heights. The capacitive device also includes an insulating region between the first electrode and the second electrode; and at least one slot formed on one of the first electrode and the second electrode.