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

VSEngineering Contradiction Analysis

1Reliability

If an ESD element is added to protect against electrostatic discharge, then ESD resistance is improved, but the mounting area increases

Engineering Contradiction:
ImproveESD resistanceVSAvoidmounting area
Core Design Contradiction:
ReliabilityVSArea of stationary object

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.

Inventive Principle:
Principle #5Merging (Combining)

2Area of stationary object

If the component structure is simplified to reduce mounting area, then mounting area is reduced, but mechanical strength deteriorates

Engineering Contradiction:
Improvemounting areaVSAvoidmechanical strength
Core Design Contradiction:
Area of stationary objectVSStrength

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.

Inventive Principle:
Principle #40Composite materials

3Reliability

If passive components are designed for high reliability against thermal and electrical stress, then reliability is improved, but device complexity increases

Engineering Contradiction:
Improvethermal and electrical stabilityVSAvoidcomponent structure
Core Design Contradiction:
ReliabilityVSDevice complexity

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.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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

Methodology Applied
Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

a protective layer disposed to cover the discharge portion

Methodology Applied
Scientific EffectProtective coating: Coatings

Implementation Method 3

conductive resin layers for enhanced reliability and noise reduction

Methodology Applied
Scientific EffectVibration damping: Damping

Data Source

PatentUS20190035553A1Composite electronic component and board having the same
Publication Date: 2019.01.31 SAMSUNG ELECTRO MECHANICS CO LTD
  • US20190035553A1 patent drawing
  • US20190035553A1 patent drawing
  • US20190035553A1 patent drawing

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.