Composite Electronic Component Integrating Common Mode Filter and Capacitor Array
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Solution Overview
Problem
The increasing number of common mode filters and multilayer ceramic capacitors in electronic devices necessitates a larger component disposition area, limiting miniaturization and increasing manufacturing costs, especially in LCD connectors with differential transmission schemes.
Innovation Solution
A composite electronic component is developed by coupling a common mode filter with a multilayer ceramic capacitor array, using a conductive adhesive, where the multilayer ceramic capacitor array includes dielectric layers and internal electrodes, and dummy dielectric layers with different compositions to reduce noise and component size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of common mode filters and multilayer ceramic capacitors is increased to improve noise removal and signal filtering performance, then the filtering effectiveness is improved, but the component disposition area increases
Solution Approach 1:
The patent combines a common mode filter and multiple multilayer ceramic capacitors into a single integrated composite electronic component. The common mode filter includes a choke coil with first and second windings, while multilayer ceramic capacitors are coupled to external electrodes on both side surfaces of the filter body, creating a unified structure that provides both filtering and capacitance functions in one component.
Solution Approach 2:
The composite electronic component serves multiple functions simultaneously: the common mode filter portion removes common mode noise from differential signals, while the integrated multilayer ceramic capacitors provide differential mode filtering and signal coupling. This multi-functional design eliminates the need for separate discrete components.
2Reliability
If multiple discrete components are used to achieve required filtering and noise removal functions, then the functional performance is improved, but the manufacturing cost increases
Solution Approach 1:
The patent integrates multiple discrete components (common mode filter and multiple multilayer ceramic capacitors) into a single composite electronic component with a unified structure. The capacitors are coupled to external electrodes on both side surfaces of the filter body, creating one manufacturable unit that replaces multiple separate components.
Solution Approach 2:
The patent employs different dielectric materials with distinct compositions in the multilayer ceramic capacitor structure, including functional dielectric layers and dummy dielectric layers with different properties. This material differentiation enables optimized electrical characteristics while maintaining a unified component structure.
3Area of stationary object
If a compact component structure is used to reduce mounting area, then the device miniaturization is improved, but the noise removal effectiveness may be compromised
Solution Approach 1:
The patent utilizes three-dimensional spatial arrangement by placing external electrodes on both side surfaces of the common mode filter body. The multilayer ceramic capacitors are coupled to these side surface electrodes, effectively using the vertical and lateral dimensions to pack multiple functional elements into a compact footprint without compromising the horizontal winding structure needed for noise filtering.
Solution Approach 2:
The patent embeds multilayer ceramic capacitors within the overall structure of the composite electronic component, with capacitors coupled to external electrodes that are part of the filter body. The capacitors are positioned in the space adjacent to the filter windings, creating a nested arrangement where multiple functional elements occupy overlapping spatial volumes.
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 significantly reduces the mounting area in LCD connectors, decreases acoustic noise, and lowers manufacturing costs by integrating multiple components into a single unit, while maintaining effective signal attenuation across a wide frequency band.
Implementation Method 1
the common mode filter including a common mode choke coil
Implementation Method 2
the multilayer ceramic capacitor array including a plurality of dielectric layers; first to fourth external electrodes disposed on both side surfaces of the common mode filter and electrically connected to the common mode choke coil
Implementation Method 3
The common mode filter and the multilayer ceramic capacitor array may be coupled to each other by a conductive adhesive
Data Source
AI summary
A composite electronic component includes a composite body in which a common mode filter and a multilayer ceramic capacitor array are coupled to each other, the common mode filter including a first body in which a common mode choke coil is disposed, and the multilayer ceramic capacitor array including a second body in which a plurality of dielectric layers are stacked.