Coil Component Electrode Layout for Smaller Mounting Footprint
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Solution Overview
Problem
Conventional coil components face challenges in achieving compactness and reducing the effective mounting area, leading to increased thickness and mounting surface area when external electrodes are applied, which can result in inefficiencies in electronic device miniaturization.
Innovation Solution
A coil component design featuring a body with a coil portion, spaced external electrodes, and multiple insulating layers that cover edges and surfaces, ensuring the electrodes are separated from the edges and vertex regions, thereby reducing the overall size and effective mounting area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external electrodes are formed by applying conductive paste to both end surfaces, then electrical connection is achieved, but overall thickness of the coil component increases
Solution Approach 1:
The external electrodes are repositioned from the end surfaces to the side surfaces of the magnetic body. This dimensional relocation allows the electrodes to extend along the length direction rather than increasing thickness, achieving electrical connection without compromising the compact thickness of the component.
Solution Approach 2:
The electrode structure is divided into multiple segments: internal electrodes formed within the coil winding, external electrodes formed on side surfaces, and insulating layers separating them. This segmentation allows each component to perform its function optimally while maintaining overall compactness.
2Reliability
If coupling member extends from component in width and length direction, then mounting connection is achieved, but effective mounting area is increased
Solution Approach 1:
The external electrodes are positioned on the side surfaces of the magnetic body, utilizing the vertical dimension and side surface area rather than requiring extensive width and length. This allows mounting connection through the coupling member while minimizing the effective mounting area footprint on the substrate.
Solution Approach 2:
The insulating layers are selectively applied to specific regions: first and second insulating layers on opposite side surfaces, and third and fourth insulating layers on opposite end surfaces. This localized insulation approach ensures electrical isolation where needed while maintaining compact electrode placement for efficient mounting.
Data Source
AI summary
A coil component includes a body, a coil portion disposed inside the body, a first external electrode and a second external electrode spaced apart from each other on one surface of the body and connected to the coil portion, a first insulating layer and a second insulating layer respectively connected to the one surface of the body, respectively disposed to side surfaces of the body to extend upwardly of the one surface of the body, and a third insulating layer and a fourth insulating layer respectively connected to the one surface of the body, respectively disposed on end surfaces of the body and each extending upwardly of the one surface of the body. A portion of each of the first and second external electrodes, exposed from the first to fourth insulating layers, is spaced apart from each of a plurality of edges of the one surface of the body.