Multilayer Coil Component Electrode Cavity for Plating Containment
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Solution Overview
Problem
Existing multilayer coil components face challenges in size and profile reduction due to the risk of plating extension, which is difficult to manage with conventional insulation coatings.
Innovation Solution
A multilayer coil component design featuring an insulating layer with cavities for the outer electrode, preventing plating extension by positioning the electrode within the cavities and using a resin material with higher insulation resistance, along with specific plating layers like Cu, Ni-Sn, or Ni-Au, to enhance electrical insulation and reduce component size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an insulation coating is applied to the upper surface and lower surface to ensure insulation performance, then insulation resistance is improved, but size reduction and profile reduction become difficult
Solution Approach 1:
The patent extracts the insulation function from a separate coating layer and integrates it into the element assembly structure itself by forming an insulating layer within cavities. This eliminates the need for additional external insulation coatings, thereby maintaining insulation performance while reducing overall component size and profile.
Solution Approach 2:
The outer electrode is nested within the cavity of the insulating layer, which is itself integrated into the element assembly. This nested configuration allows the insulation function to be embedded within the structural components rather than requiring separate external layers, achieving size reduction while maintaining insulation performance.
2Reliability
If plating is extended to ensure electrical connection, then electrical conductivity is improved, but plating extension occurs which complicates manufacturing
Solution Approach 1:
The patent applies plating locally only to the bottom surface electrode within the cavity region where electrical connection is needed, rather than extending plating across the entire component surface. This localized approach ensures adequate electrical conductivity at critical interfaces while preventing unnecessary plating extension that would complicate manufacturing and increase costs.
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 effectively suppresses plating extension, enabling size and profile reductions while maintaining electrical performance, thus improving the compactness and reliability of the coil component.
Implementation Method 1
The insulating layer has a cavity, and the outer electrode is disposed in the cavity
Implementation Method 2
the insulating layer is a resin material having larger insulation resistance than the element assembly
Data Source
AI summary
A coil component that is a multilayer coil component includes an element assembly containing a magnetic material, a coil embedded in the element assembly, an outer electrode electrically coupled to the coil and disposed on a bottom surface of the element assembly, and an insulating layer disposed on the bottom surface of the element assembly. The insulating layer has a cavity, and the outer electrode is disposed in the cavity.