Multilayer Capacitor With Segmented GND Electrodes
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Solution Overview
Problem
Conventional multilayer capacitors mounted on circuit boards experience noise interference between the power supply side and the IC side, as voltage variations on one side can affect the other, due to the configuration of signal and GND electrodes.
Innovation Solution
A multilayer capacitor design with signal and GND electrodes laminated with dielectric layers, where the signal electrodes are connected to both sides of the capacitor element body and the GND electrodes are arranged perpendicular to the longitudinal direction, allowing signal current to flow perpendicularly and creating a time difference for GND electrode interaction, effectively functioning as two capacitors to isolate noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional multilayer capacitor configuration is used with single GND electrode connection, then device complexity is reduced, but noise interference occurs between power supply side and IC side
Solution Approach 1:
The GND electrode layer is divided into first and second GND electrodes that are spaced apart in the direction perpendicular to the longitudinal direction. This segmentation creates separate noise filtering paths for power supply side and IC side, preventing noise interference between the two sides while maintaining effective noise suppression functionality.
Solution Approach 2:
The capacitor is designed to function as two capacitors in parallel by utilizing the spatial arrangement of the first and second GND electrodes. This creates apparent power-supply-side capacitor and apparent IC-side capacitor that operate independently in different spatial zones, effectively separating noise filtering functions along the longitudinal direction.
2Reliability
If signal electrode is led to both side faces along longitudinal direction, then noise filtering performance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The signal electrode layer is divided into multiple signal electrodes, each led to different side faces along the longitudinal direction. This segmentation allows each signal electrode to connect to corresponding terminal electrodes on specific sides, improving noise filtering performance while distributing the manufacturing precision requirements across multiple simpler connection points.
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 configuration allows for the removal of noise without interference between the power supply and IC sides, reducing the influence of voltage variations on either side, by functioning as two capacitors in parallel, thereby suppressing noise independently on each side.
Implementation Method 1
a capacitor element body of a nearly rectangular parallelepiped shape in which a signal electrode layer and a GND electrode layer are laminated with a dielectric layer in between
Data Source
AI summary
A multilayer capacitor has a capacitor element body of a nearly rectangular parallelepiped shape in which a signal electrode layer and a GND electrode layer are laminated with a dielectric layer in between, and signal terminal electrodes and GND terminal electrodes each set of which is provided on either of two side faces along the longitudinal direction of the capacitor element body. A signal electrode is led to each of the two side faces along the longitudinal direction of the capacitor element body and connected to the signal terminal electrodes. First GND electrode and second GND electrode are arranged alongside as spaced in a direction perpendicular to the longitudinal direction of the capacitor element body. The first GND electrode is led to one side along the longitudinal direction of the capacitor element body and connected to the GND terminal electrode. The second GND electrode is led to the other side along the longitudinal direction of the capacitor element body and connected to the GND terminal electrode.