Integrated Decoupling Device for CPU Noise Filtering
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Solution Overview
Problem
Conventional solid electrolyte capacitors are inadequate for filtering high-frequency noise in modern CPUs, leading to operational issues due to their limited frequency range and large size, which hinders the development of compact decoupling devices.
Innovation Solution
A decoupling device incorporating a lead frame, a capacitor unit, and a high dielectric organic-inorganic composite material layer, where the composite material is connected in parallel to the capacitor unit, providing both regulated voltages and high-frequency filtering capabilities, and can be designed with multiple layers for varying capacitance needs, with an optional metal layer for electromagnetic shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a normal solid electrolyte capacitor is used, then the device size is small and capacitance is large, but it can merely filter noise with low frequency and generates high frequency noise detrimental to CPU operation
Solution Approach 1:
The patent combines a solid electrolyte capacitor and a ceramic capacitor into a single integrated decoupling device. The solid electrolyte capacitor provides low-frequency noise filtering and voltage regulation, while the ceramic capacitor handles high-frequency noise filtering. This merging of two different capacitor types resolves the contradiction by enabling both low-frequency and high-frequency noise filtering within a single compact device, eliminating the generation of harmful high-frequency noise while maintaining small size and large capacitance characteristics.
Solution Approach 2:
The patent employs a composite structure combining two different capacitor technologies (solid electrolyte and ceramic) with distinct electrical characteristics. The solid electrolyte capacitor offers high capacitance and low ESR for low-frequency operation, while the ceramic capacitor provides low inductance and high self-resonant frequency for high-frequency operation. This composite approach enables the decoupling device to effectively filter across a broad frequency spectrum without generating harmful high-frequency noise.
2Reliability
If an individual tantalum solid electrolyte capacitor and an individual multilayered ceramic capacitor are assembled, then a decoupling device for decoupling within a broadband environment can be formed, but the capacitor assembly occupies significant space
Solution Approach 1:
The patent merges two separate capacitor assemblies into a single integrated decoupling device with shared terminal structure. The solid electrolyte capacitor and ceramic capacitor are electrically connected in parallel and share common anode and cathode terminals, eliminating the need for separate mounting spaces and interconnecting traces. This integration achieves broadband decoupling capability while significantly reducing the overall device volume compared to using individual capacitors.
Solution Approach 2:
The integrated decoupling device performs multiple functions within a single compact structure: low-frequency noise filtering, high-frequency noise filtering, voltage regulation, and broadband decoupling. The shared terminal structure and parallel connection of different capacitor types enable the device to handle a wide frequency spectrum while occupying minimal space, achieving multi-functionality in a compact form factor suitable for modern CPU applications.
3Reliability
If a decoupling device with both low-frequency and high-frequency filtering capabilities is designed, then broadband noise filtering is achieved, but the structure becomes complex
Solution Approach 1:
The patent merges two capacitor units with different filtering characteristics into a single decoupling device with a unified terminal structure. The solid electrolyte capacitor and ceramic capacitor are connected in parallel with shared anode and cathode terminals, creating a simple parallel circuit topology that achieves broadband noise filtering without complex interconnections, control circuits, or multiple mounting structures. This merging approach maintains structural simplicity while delivering enhanced filtering performance across the frequency spectrum.
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 enables a compact, efficient decoupling device with improved high-frequency filtering and reduced electromagnetic interference, allowing for smaller, more effective power circuit components in CPUs.
Implementation Method 1
The high dielectric organic-inorganic composite material layer is connected to the capacitor unit in parallel via the metal layer
Implementation Method 2
a high dielectric organic-inorganic composite material layer is provided
Data Source
AI summary
A decoupling device includes a lead frame, a capacitor unit, a metal layer, and a high dielectric organic-inorganic composite material layer. The lead frame includes a cathode terminal portion and an anode terminal portion. The capacitor unit is disposed on the lead frame. The capacitor unit includes a cathode portion, an anode portion, and an insulation portion located between the cathode portion and the anode portion. The cathode portion is electrically connected to the cathode terminal portion, and the anode portion is electrically connected to the anode terminal portion. The high dielectric organic-inorganic composite material layer is connected to the capacitor unit in parallel via the metal layer.