Three Capacitor Stack for Multi-Frequency Filtering
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Solution Overview
Problem
In power delivery network design, especially for miniaturized systems like small computing devices with large processing cores, there is a need to reduce the size and quantity of capacitors to support system-on-chip (SoC) load requirements while effectively filtering multiple resonant frequencies.
Innovation Solution
A three-in-one capacitor design is implemented, where three capacitors with different capacitances are integrated into a single device, each targeting specific resonant frequencies, replacing the need for separate devices and reducing overall size and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate capacitors are used to filter different resonant frequencies, then filtering effectiveness is improved, but device size and quantity increase
Solution Approach 1:
The patent combines multiple capacitors with different capacitance values into a single integrated device. The capacitor device includes a first capacitor with first and second electrodes, a second capacitor with third and fourth electrodes, and a third capacitor with fifth and sixth electrodes, all sharing a common dielectric layer. This merging approach maintains the ability to filter multiple resonant frequencies while significantly reducing the overall device volume compared to using separate capacitor components.
Solution Approach 2:
The single capacitor device performs multiple functions by incorporating capacitors with different capacitance values (first capacitance value, second capacitance value, and third capacitance value) that target different resonant frequencies. Each capacitor within the device can be independently connected to different power nets, allowing the device to simultaneously address multiple power delivery network requirements and filter various resonant frequencies.
2Reliability
If multiple separate capacitors are used to meet power delivery requirements, then power delivery network performance is improved, but system complexity increases
Solution Approach 1:
The patent integrates multiple capacitor functions into a single device structure, reducing system complexity. The capacitor device includes multiple capacitors with different capacitance values that can be independently connected to different power nets, maintaining the ability to meet complex power delivery requirements while simplifying the overall system architecture by eliminating the need for multiple separate capacitor components and their associated interconnections.
3Volume of stationary object
If capacitor size is reduced to support miniaturization, then solution size is reduced, but filtering capability may be compromised
Solution Approach 1:
The patent transitions from a planar arrangement of separate capacitor components to a three-dimensional stacked configuration. Multiple capacitors are arranged in different layers within a single device, with dielectric layers and electrode structures organized vertically. This dimensional change allows the device to maintain adequate filtering capability through multiple capacitance values while achieving significant miniaturization of the overall solution size.
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 solution allows for efficient filtering of multiple resonant frequencies in a compact form, enhancing power delivery network performance and miniaturization, thereby supporting the miniaturization of solution sizes in small computing devices.
Implementation Method 1
a first capacitor stack that includes a first plurality of layers of reference electrodes interleaved with first capacitor electrodes, wherein, a respective layer of dielectric material is included in between each of the reference electrodes and the first capacitor electrodes
Data Source
AI summary
A three capacitor stack and associated methods are shown. An exemplary capacitor device may include a first capacitor stack that includes a first plurality of layers of reference electrodes interleaved with first capacitor electrodes, a second capacitor stack on the first capacitor stack that includes a second plurality of layers of reference electrodes interleaved with second capacitor electrodes, and a third capacitor stack on the second capacitor stack that includes a reference electrode and a third capacitor electrode. A respective layer of dielectric material is formed between the reference electrodes and the first capacitor electrodes, the second capacitor electrodes, and the third capacitor electrode.