MLCC External Electrode Resin Composition for Low ESR and Strength
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Solution Overview
Problem
Multilayer ceramic capacitors (MLCCs) face challenges in achieving high reliability and strength characteristics, particularly in miniature electronic devices and automotive applications, where existing dual-layer electrode structures with conductive resin layers are insufficient to meet increasing industry standards.
Innovation Solution
A multilayer electronic component design incorporating a body with dielectric layers and internal electrodes, featuring external electrodes with a conductive metal, epoxy resin, and acrylic resin in the conductive resin layer to enhance flexural strength and reduce equivalent series resistance (ESR).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dual-layer structure with conductive resin layer is used, then reliability is improved, but flexural strength is insufficient
Solution Approach 1:
The patent applies composite materials by combining epoxy resin and acrylic resin in the conductive resin layer. This composite approach leverages the complementary properties of both resins: epoxy resin provides strong adhesion and mechanical strength, while acrylic resin enhances flexibility and impact resistance. The combination resolves the contradiction by achieving both high reliability and improved flexural strength that neither material could provide alone.
Solution Approach 2:
The patent employs parameter changes by adjusting the compositional parameters of the conductive resin layer, specifically the ratio and types of resin materials. By modifying the resin composition parameters (epoxy and acrylic resin combination), the patent optimizes both reliability and flexural strength characteristics, transforming the material properties to meet dual requirements.
2Reliability
If conductive resin layer is applied to electrode layer, then penetration of plating solution is prevented, but equivalent series resistance (ESR) increases
Solution Approach 1:
The patent applies parameter changes by optimizing the thickness and composition parameters of the conductive resin layer. By carefully controlling the resin layer parameters (composition ratio of epoxy and acrylic resins, layer thickness), the patent achieves adequate protection against plating solution penetration while minimizing the increase in ESR, thus balancing protection and electrical performance.
Data Source
AI summary
A multilayer electronic component includes a body including first and second surfaces opposing each other in a first direction, third and fourth surfaces connected to the first and second surfaces and opposing each other in a second direction, and fifth and sixth surfaces connected to the first to fourth surfaces and opposing each other in a third direction and including a dielectric layer and internal electrodes alternately disposed with the dielectric layer interposed therebetween in the first direction, and external electrodes disposed on the third and fourth surfaces, wherein the external electrodes include an electrode layer disposed on the body and a conductive resin layer disposed on the electrode layer, and the conductive resin layer includes a conductive metal, an epoxy resin, and an acrylic resin.