Composite Electronic Component Integrating ESD Protection and Capacitance
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Solution Overview
Problem
Electronic control units (ECUs) in vehicles face challenges with reliability and durability due to severe temperature changes, mechanical stress, and electromagnetic interference, requiring passive components with enhanced thermal and electrical stability and reduced size for mounting.
Innovation Solution
A composite electronic component comprising a multilayer capacitor, an electrostatic discharge (ESD) protecting element, and conductive resin layers, which improves ESD absorption, mechanical strength, and reduces mounting area, featuring a discharge portion with conductive polymer and an epoxy-based protective layer, and conductive resin layers for enhanced reliability and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an ESD element is added to protect against electrostatic discharge, then ESD resistance is improved, but the mounting area increases
Solution Approach 1:
The patent combines the ESD protecting element with the multilayer capacitor into a single composite electronic component. The ESD element and capacitor share a common body structure and are electrically connected through internal electrodes, allowing both ESD protection and capacitance functions to be achieved within one component footprint, thereby improving ESD resistance without increasing the mounting area on the circuit board.
2Area of stationary object
If the component structure is simplified to reduce mounting area, then mounting area is reduced, but mechanical strength deteriorates
Solution Approach 1:
The patent employs a composite structure where the ESD protecting element and multilayer capacitor are integrated within a single body. The body comprises multiple dielectric layers and internal electrodes that provide both electrical functionality and mechanical reinforcement. This composite architecture achieves space efficiency while maintaining robust mechanical strength through the multi-layer construction and interlocking electrode structures.
3Reliability
If passive components are designed for high reliability against thermal and electrical stress, then reliability is improved, but device complexity increases
Solution Approach 1:
The composite electronic component performs multiple functions within a single device: it provides capacitance for power filtering and decoupling, ESD protection for electrical stress resistance, and thermal management for stability under thermal stress. The integrated body structure with multiple dielectric layers and internal electrodes simultaneously achieves all these functions, improving reliability against thermal and electrical stress while avoiding the need for separate components that would increase device complexity.
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 enhances ESD resistance and mechanical strength while reducing the component's mounting area, improving reliability and stability against thermal and mechanical stress, and acoustic noise, suitable for high-speed data applications like USB 3.0 and HDMI.
Implementation Method 1
a discharge portion disposed on the first surface of the capacitor body to be connected to the first to fourth external electrodes
Implementation Method 2
a protective layer disposed to cover the discharge portion
Implementation Method 3
conductive resin layers for enhanced reliability and noise reduction
Data Source
AI summary
The composite electronic component includes: a multilayer capacitor; an electrostatic discharge (ESD) protecting element; and first to fourth conductive resin layers, The multilayer capacitor includes: a capacitor body including dielectric layers and a plurality of first and second internal electrodes alternately disposed with respective dielectric layers interposed therebetween; first and second external electrodes connected to exposed portions of the first internal electrodes; and third and fourth external electrodes connected to exposed portions of the second internal electrodes. The ESD protecting element includes: a discharge portion disposed on the first surface of the capacitor body to be connected to the first to fourth external electrodes; and a protective layer. The first to fourth conductive resin layers are formed on the first to fourth external electrodes, respectively, and extend to portions of a first surface of the protective layer, respectively.


